características técnicas bombas mark iii

Bulletin P-10-501a (E)

TechnicalInformationand DesignCharacteristics

Durco Mark IIIAlloy Pumps

• ANSI Standard• Sealmatic• Unitized Self-Priming• Recessed Impeller• Lo-Flo

MKIII TECH BULLETIN - 1 12/5/02 11:00 AM Page 2 Dan K. Snelson RED Manuals-2:TECHNICAL BULLETINS:MKIII TECH P-10-501:

2

Mark III ANSI Standard Pump Page 4

Power Ends 5Shafts & Sleeves 6Shaft Materials & Data 7Shafts & Bearings 8Deflection Graphs 9Isocorrosion Graphs 10SealSentry™ 11-14DurcoShield™ 15Impellers 16-17Lo-Flo™ 18Casing Options 19DurcoShield™ 15Ultralign™ 20Low/High Temperature 21BaseLine™ 22-27

PerformanceCurves 8Interchangeability 29Pressure/Temperature

Ratings 30Suction Pressure

Ratings 31General Data 32Minimum Flow 33Fastener Standards 33Group I Parts 34Group II & III Parts 35Pump/Baseplate

Dimensions 36Materials 37How To Specify 38

Mark IIISealmatic Pages 39-43

MARK III PUMP &ENHANCEMENTS

TECHNICAL DATA

SEALMATIC

Heavy-dutychemical servicepumps are pre-ferred aroundthe globe.

Exclusivefeatures improvepump reliabilityand extendmean timebetween plannedmaintenance(MTBPM).

Durco pumpsare among theindustry leadersin hydrauliccoverage andefficiency.

Dynamicallysealed pumpeliminates theneed forconventionalmechanical seals.

Pumps deliveredworldwide are

manufactured inFlowserve facilitiescertified either to ISO9001 or to ISO 9002.

LLOY

D’S

REG

ISTER QUALITY

CO

MP

AN

Y

IS O 9001

Quality System Certificate

DurcoMark III ANSI ProcessPumps


3

Mark IIISelf-Priming Pages 44-48Priming Tanks 49-51

SELF-PRIMING

Mark IIIRecessedImpeller Pages 52-55

RECESSEDIMPELLER

Power Monitor Pages 56-57

POWER MONITOR

Good PumpPractice Pages 58-59

GOODPUMP PRACTICE

Located out of thesump. Reducescosts of verticalpump optionsand simplifiesmaintenance.

Vortex actionassures trouble-free pumping oflarge diametersolids andslurries. Alsoselected for shearsensitive media.

Protects pumpsfrom costlydamage due toimproper opera-tion at both highand low horse-power loadpoints.

Observing theseseven principlesof “Good PumpPractice” cansignificantlyextend MTBPM.


FLOWSERVE CORPORATIONDAYTON, OHIO, U.S.A.

ANSI 3 PUMPEQUIP NO.SIZEALLOYSEALSEAL CODECAPRPMPOTMPSERIAL NO.

BASETYPE

TDHMDP

SG VCE 01/94

4

Baseplate size

Seal type ormodel

TDH

Maximum design pressure(at 100°F)

Specific gravity

Viscosity

Date assembled

Location where built

How To IdentifyDurco Mark IIIProcess PumpsAn example of thenameplate used onthe Mark III pump is shown below. Thisnameplate is alwaysmounted on the MarkIII bearing housing.

Customer’sequipment number

Pump size

Alloy

Sealmanufacturer

Seal code

Capacity

RPM

Customer’spurchase order

TemperatureSerialnumber

Unique FeaturesExtend MTBPM

Improved pump reliabil-ity and extended MTBPMare achieved with exclu-sive features including:• Optional ANSI 3A™

power end (See page 5)• SealSentry™ seal

chambers featuring theFML model with flowmodifiers and largetapered bore (Seepage 11)

• The unique reversevane impeller (Seepage 16)

• Ultralign™ with C-Plusprecision motor andpump shaft alignment(See page 20)

• BaseLine family of pre-engineered baseplates(See page 22)

DurcoMark III ANSI Standard


5

ANSI 3A™ power end isso advanced it carries athree-year MTBPMguarantee.• Certified clean room

assembly• Inpro/Seal’s “VBX”

non-contact VaporBlock Bearing Isolatorkeeps lubricants in andcontaminants out

• Magnetic drain plugcollects metalliccontaminants

• Top vent replacedwith plug

A Choice of Power Ends

Standard Mark IIIApower ends feature:• Double row angular

contact outboard/single row, deepgroove inboard bear-ings for excellent axialand radial load support

• Double lip oil seals• Top mounted vent

and oil filler• Trico oiler• Large one inch

(25 mm) diameterreflective sight glass

• Micrometer adjust-ment (See page 8)

• Optional oil slinger

Lubrication options:• Synthetic lubricants

can allow up to threeyears between oilchanges

• Oil mist systems• Shielded and grease

lubricated bearings(two-year MTBPMguarantee)

Note: Adherence toproper installation,operation and main-tenance program isnecessary for three-yearMTBPM guarantee.

Optional swing-away bearing housing foot

Optional finnedoil cooler

All Durco power endsfeature:• Metal-to-metal con-

struction to assure atrue running andconcentric shaft,thereby extendingbearing and mechan-ical seal life

• Ductile iron frameadapter meetingASME B.73.1 criteria

ANSI PUMP & ENHANCEM

ENTS

DurcoMark III ANSI StandardPower Ends


6

Durco shafts andsleeves are

designed to improvepump reliability.

SHAFT MATERIALCHOICESStandard: investmentcast or high alloy barstock available in a widerange of materials, in-cluding proprietary DC8and SD77 wet ends.

DC8 and SD77 offersuperior corrosion resis-tance and hardness tominimize shaft fret corro-sion and maximize shaftwet end performance.• DC8 – a cobalt base

alloy with chromiumand molybdenum

• SD77 – or Superchlor®

is a high silicon ironalloy

Flowserve recommends theuse of solid shafts rather thanshaft sleeves to reduce theharmful effects of deflectionand vibration. Shaft sleevesmay simplify maintenancebut solid shafts reduce it.

➅ Run-out of <0.001 in (0.03 mm)at mechanical seal allows sealfaces to run true.

➆ Critical surfaces ground to a sur-face finish of 16µ in (0.4 micron)ensure the secondary sealingability of mechanical seals.

➇ Steel power ends handle higherhorsepower loads thanstainless.

➈ Minimally radiused edgesensure full contact withimpeller for reduced run-out.

➀ Radiused “sled-runner” keywaysimprove strength at this stresspoint.

➁ Offset keyways aid shaft balance.➂ Alloy identification on every shaft

and sleeve ensures that the rightparts go in every time.

➃ Large radii fillets add strength.➄ Accurate machining under

bearings ensures perfectbearing fits without vibrationor hot running.

SHAFT CHOICES

Composite: a steel shaftend-to-end with an inte-gral sleeve of DC8, SD77high silicon iron, ceramic(alumina or zirconia)

Friction-Welded: a steelpower end friction weldedto a solid alloy wet end

Solid: steel end-to-end orstainless alloy end-to-end

Hook Sleeve: a steel shaftend-to-end or a steelpower end friction-weldedto a stainless wet endaccommodating a hooksleeve

DurcoMark III Shafts &Sleeves


7

Flowserve Alloy Identification – Shafts*

Shafts Symbol Alloy (power end/wet end) Brinell Hardness

Composite BBC8 (1144 Steel/DC8) 300BB77 (1144 Steel/SD77 Hi Si Iron) 520BBC3 (High purity ceramic [alumina]) –BBSZ (1144 Steel/Ceramic [zirconia]) –

Friction Welded ZH (Steel/316SS)* 160ZC20 (steel/C20) 130EHB (304SS/Hast B)® 230EHC (304SS/Hast C)® 220C450 (Steel/450SS)**

Solid BB (1144 Steel)* 200E (304 SS) 155H (316 SS)* 160

HB (Hast B)® 230HC (Hast C)® 220

4140 (4140 Steel)**Also available in hook shaft **Group I T-Line only

Flowserve Alloy Identification – Sleeves*Symbol Alloy Brinell Hardness

DC2 Chlorimet 2 (Hast B) 230DC3 Chlorimet 3 (Hast C) 220DC8 Cobalt-based, proprietary 300DM Monel® 150DNI Nickel® 130D4 316 SS 160D20 Durimet 20 130H 316 SS 160TI Titanium 200

TIP Titanium, Palladium stabilized 200ZR Zirconium 200

*Other alloys available upon request® Hastelloy is a registered trademark of Haynes International, Inc. ® Monel is a registered trademark of International Nickel Co. Inc.

Special Shaft andSleeve Alloys

There are three impor-tant considerations inthe selection of a suit-able shaft material for apump application: 1) corrosion resistance,2) wear resistance, and3) shock resistance –both thermal andmechanical. To meet these criteria,Flowserve’s exclusiveDC8 alloy wasdeveloped specifically asa shaft sleeve material.

Exclusive Durco DC8Composite Shaft

Shaft is machined as anintegral unit after DC8 alloyis permanently affixed. Singlemachining tolerance meansbetter concentricity and lowerrunout.

DC8 is an idealsleeve materialbecause of itsoptimum com-bination of strength(tensile strength of60,000 psi), hard-ness (Brinell of 300),and corrosion resis-tance (superior toAlloy 20 in manycases).

Fully contained PTFEencased silicone “O” ringprotects shaft thread.

Group IShaft

Group IIShaft

Group IIIShaft

Durco shafts and sleevesare clearly marked with thematerial symbol.


ENTS

*1.1250 Ø (28.575 mm)1.1245 Ø (28.562 mm)

1.875 Ø (47.62 mm)1.873 Ø (47.57 mm)

1.375 Ø (34.93 mm)1.373 Ø (34.88 mm)

*6 x 4-10 pump shaft coupling end 1.5000 Ø (38.100 mm)1.4995 Ø (38.087 mm)

2.375 Ø (60.32 mm)2.374 Ø (60.30 mm)

.8750 Ø (22.225 mm)

.8745 Ø (22.212 mm)

2.625 Ø (66.68 mm)2.623 Ø (66.62 mm)


The Heart of thePump: Shaft and

Bearing Design

Flowserve offers thelargest shaft and bearingcomponents available instandard ANSI pumps.The following compari-son of a Durco Group IIpower end with that of amajor competitor demon-strates the benefits ofheavy-duty design.

Bearings (see Table 1)Greater load handlingrating means extendedMTBPM.

Extended bearing lifecomparison is the ratioof the load ratings to thethird power, or:

I.B.=13,400 3

=1.59 (+59%)11,900

O.B.=19,200 3

=1.61(+61%)16,400

Shafts (see Table 2)Solid shafts are recom-mended over shaftsleeves because theyreduce the harmfuleffects of deflection andvibration. While shaftsleeves may simplifymaintenance, solidshafts reduce it.

Proper selection ofwet end materials of con-struction and mechanicalseal design offset posi-tive features of the shaftsleeve option.

8

Group II Overhang Solid Shaft Deflection Shaft DeflectionLength Diameter Index w/sleeve Index

Flowserve 711/16 in 17/8 in 37 11/2 in 90(189 mm) (48 mm) (38 mm)

MajorCompetitor 83/8 in 13/4 in 63 11/2 in 116

(213 mm) (45 mm) (38 mm)

Table 2Deflection Comparison

Group II I.B. Dynamic O.B. DynamicBearing Load Rating Bearing Load Rating

Flowserve 6310 13,400 lb 5310 19,200 lb(6,078 kg) (8,709 kg)

MajorCompetitor 6309 11,900 lb 5309 16,400 lb

(5,398 kg) (7,439 kg)

Table 1Bearing Comparison

43-252% greater stiffness,indicated by lower indexnumbers, results in longerMTBPM.

Durco bearings aredesigned to last up to61% longer.

Unique ExternalMicrometer ImpellerAdjustment

It reduces maintenancetime and, most impor-tantly, is preciselyaccurate.

Simply loosen the set-screws. Using a wrenchrotate the bearing carriercounterclockwise untilthe impeller lightlytouches the rearcover plate.

Select the impeller setting. Each notch on the carrierring represents exactly0.004 in (0.10 mm) ofclearance. For an impellersetting of 0.020 in (0.5 mm) count fivenotches counterclockwise.

Move the bearing carrierclockwise the selectednumber of notches. Tightenthe setscrews and checkthe impeller clearancewith the feeler gage.The formula I=L3/D4

offers an index ofdeflection to comparepump designs where:I = index of deflectionL = length of shaft

overhang frombearing

D= rigid shaft diameter

Note: The DeflectionIndex provides anapproximate comparisonof shaft stiffness. Adetailed analysis shouldbe made to determineactual shaft deflection.

DurcoMark III Heavy-DutyShaft andBearings


9

The following shaftdeflection curves

are based on the maxi-mum size reverse vaneimpeller pumping 1.0specific gravity liquid.Shaft deflection variesdirectly with specificgravity and by thesquare of the pumpspeed. The graphs showthat as flow is increasedto BEP, the deflectiondecreases. The measure-ment given is deflectionat the face of the sealchamber.

Flowserve recommends theuse of solid shafts rather thanshaft sleeves to reduce theharmful effects of deflectionand vibration. Shaft sleevesmay simplify maintenancebut solid shafts reduce it.

Group I & II3500 RPM

Group I & II1750 RPM

Group III


ENTS

SC

AL

EC

HA

NG

E

DurcoMark III DeflectionGraphs


10

For Standard Shaft and Wet-End MaterialsNote: Various materials areacceptable in the areas underthe curves as indicated.

PUMP SHAFT/SLEEVE ISOCORROSION CHART

% HCI* IF NO OXIDIZING CONTAMINANTS

TE

MP

ER

AT

UR

E °

F

140

120

100

80

60

240

220

200

180

160

TE

MP

ER

AT

UR

E °

C

16

60

49

38

27

71

116

104

93

82

10 20 30 40

HYDROCHLORIC ACID

ZONES FOR CORROSION RATESLESS THAN 10 MILS PER YEAR

BOILING CURVE

CERAMICDC2*Zr*

SD77*

SD77SD51


% H2S04

TE

MP

ER

AT

UR

E °

F

600

500

400

300

200

100

0

TE

MP

ER

AT

UR

E °

C

316

260

204

149

93

38

10 20 30 40 50 60 70 80 90 100

SULFURIC ACID


BOILING CURVE

SD77SD51

D20DC8

SD77SD51


% NAOH

TE

MP

ER

AT

UR

E °

F

DC8

600

500

400

300

200

100

0

TE

MP

ER

AT

UR

E °

C

316

260

204

149

93

38

10 20 30 40 50 60 70 80 90 100

D20SD51SD77

D4

DC8D20D4

DC8D20

SODIUM HYDROXIDE


BOILING CURVE


% HNO3

TE

MP

ER

AT

UR

E °

F

250

200

150

100

50

TE

MP

ER

AT

UR

E °

C

10

121

93

66

38

10 20 30 40 50 60 70 80 90 100

NITRIC ACID


BOILING CURVE

SD51SD77

D20D4

SD77SD51

D20D4

SD51SD77

DC8

D20D4

DC8

ISOCorrosionGraphs


11

Advanced FMSealSentry Design

Technology• Self-Flushing• Self-Venting• Self-Draining

Seal life is extended dueto superior purging ofheat, solids and vapors.Single seals can oftenbe selected where dualseals or external flushand throat bushing com-binations had been used,such as on solids, slurryand liquor services. Flushplans 11, 32, 52, 53, etc.can be eliminated. Costsare reduced. Pumpreliability is increased.

Maximizing seal lifeinvolves proper selectionof the seal chamber andseal and gland combina-tion. Generally, the sealfaces should be locateddirectly in the flush path.

Winner of the Vaaler Awardfor design innovation.

For SealSentry videoand proof of perfor-mance contact the localFlowserve sales office.

The FM (Flow Modifiers) seriesfeatures an enlarged, taperedbore with cast-in flow modifiers.

Flow Modifiers ExtendMechanical Seal MTBPM• Flow modifiers redirect

flow from circumfer-ential to axial

• Balanced flow with lowpressure drop in thechamber helps keepsolids in suspension,minimizing erosivecharacteristics ofthe process

• A mechanical sealcreates a centrifugingaction away from itsparts and into thereturning flow pathof the process liquid

• Solids and slurry mergein the returning flowpath and are flushedout of the seal chamber


ENTS

SealSentryFM SeriesSealChambers


12

Durco superiorself-flushing seal

chambers will:• Extend seal MTBPM• Improve pump

reliability• Reduce costs

The SealSentry FM provides improved internal sealchamber flush, with better solids handling, superior heatdissipation and vapor purging. These features extendmechanical seal life in both single, internal and the processside seal of dual seals.

For best performance, select seals and glands that locatethe process side seal faces directly in the flush path.

On most applications the FM self-flush can eliminate the need for an external flush such as ANSI Plans 11 and 32.

SealSentry FM – Opportunities Results and Comments

Save on capital, power, and perhaps evaporation costs and improvesystem reliability while extending seal MTBPM.

On most applications, a bypass line such as ANSI Plan 11, which can besubject to failure, can be eliminated. Save on capital and power costsand improve system reliability while extending seal MTBPM.

However, a bypass flush is recommended when negative suctionpressures or self-priming pumps are applied.

Note: Single external seals are discouraged particularly if solids, slurry, or liquor may be present, regardless of flush mechanism.

When a dual seal is required, such as toxic or environmental applications, seal life will be extended with SealSentry’s improved self-flush. Longer seal MTBPM means cost savings.

On most other applications, single seals without a bypass flush may beapplied. Save on capital, avoid product contamination, and improvesystem reliability.

On some applications, single seals with a quench may be preferred.Save on capital cost, reduce contamination, and improve systemreliability while extending seal MTBPM.

When extremely abrasive and high concentration slurries exist, dualseals that isolate the seal chamber may be preferred.

Dual Seals are often specified on solids, slurry, and liquorservices due to difficulties in properly flushing single seals.External flush on these dual seals adequately lubricatesinternal/external seal faces, but seal life can be reduced byprocess build up and temperature rise on the internal sideseal. This is caused by poor process circulation.SealSentry FM improves internal process seal flush and

allows consideration of single seals with potentially no otherflush required.Note: Abrasive services require careful consideration of theconcentration and hardness of the abrasive. Pump and sealmetallurgy, speed, and seal selection should be reviewedwith the manufacturer.

SealSentry FM Series Seal Chamber


13

FML(Preferred seal chamber design for nearly all applications)

FMS

FMI

CBL

CBS

Oversized, tapered borewith 8 specially shapedand evenly spaced cast-in flow modifiers.Designed for seals withlarge gland bolt andgasket circles.

Same chamber design as FML but accom-modates seals withsmall gland bolt andgasket circles.

Same chamber designas FMS, but includes acast-in integral gland.

Oversized, cylindrical step bore design forseals with large glandbolt and gasket circles.

Cylindrical bore design for packing arrange-ments and conventionalseals with small glandbolt and gasket circles.

• Single internal cartridge seals• Dual internal/external cartridge seals• Single internal component seals with flexibly

mounted seats*• Dual internal “true” tandem cartridge sealsNote: Bypass flush to internal seal normally notrequired. Barrier fluid or external flush may apply todual seals (Plans 52, 53, etc.).

Same seal and flush plan recommendations as forFML. Single seals with all types of seat mountingconfigurations can be installed. FMS design is pro-vided for the convenience of customers with sealstandards that include small glands. This design isFlowserve’s secondary recommendation to theFML.*

• Single internal, flexibly mounted seals. Usessleeve for seal setting and fast installation

• “Sanitary-type” applications. Less prone tobacteria build up

Note: Bypass flush is normally not required.

• Dual internal component seals. Isolates the sealchamber from the process. Allows less expensiveseal materials. Recommended in tough slurryapplications

Note: Use External Flush Plan 54. Others (i.e., Plans52, 53) not recommended without close tolerancepumping mechanism.

• Single internal component or cartridge seals whenapplied with a throat bushing. Usually selected toincrease stuffing box pressure above the vaporpressure to avoid cavitation, etc.

Note: Applied with Plan 11, etc.

• Dual internal component seals. Isolates the sealchamber from the process. Allows less expensiveseal materials. Recommended in tough slurryapplications. Allows for thermal convection typeflush plans; however, pumping ring devices arerecommended

Note: External Flush Plans 52, 53, 54

• Single internal component or cartridge seals whenapplied with a throat bushing. Usually selected toincrease stuffing box pressure above the vaporpressure to avoid cavitation, etc.

• Usually preferred over the CBL when jacketing isselected for increased effectiveness in cooling orheating

Note: Applied with Plan 11, etc.

*All seal selections perform best when the faces arelocated directly within the flush path, particularly ifsolids, liquors, or slurries are present. Component sealswith clamped seat gland designs locate the seal facesreasonably well. Flexibly mounted seat glands shouldinclude the vent and drain option to better locate theseal faces. The FML is always the first-choice chamberfor maximum self-flush path benefits.


ENTSSealSentryTypes andRecommenda-tions


14

DurcoMark III SealChamberDimensions

E

Aφ

DJ* F

B

C

G1

Aφ DJ*

B G1

C

F

K

G2

Standard Group I, II & III CBL Standard Group I, II & III FML

K

HH

Aφ

D1

F

B G

E

C

Standard Group I, II & III CBS

11

Aφ

F

B G

C

Standard Group I, II & III FMS

J1*

H1

D2

K1

H2

K2

J2*

11

Aφ

Standard Group I, II & III FMI

E

H

G

CFML/CBL A B Drilled D E F G1 G2 H J* K

No. Size B.C.

MARK III GROUP I 13/8 33/8 4 3/8-16 4 211/32 2 3/16 27/8 21/8 3/4 Annulus 25/32 29/32

MARK III GROUP II 17/8 41/8 4 1/2-13 5 35/8 2 3/16 35/8 25/8 7/8 Annulus 31/8 21/4

MARK III GROUP III 25/8 51/8 4 1/2-13 6 327/32 3 3/16 45/8 35/8 1 Annulus 33/8 35/16

*Face of seal chamber to end of optional shaft sleeve

FMI A E G H

MARK III GROUP I 13/8 23/8 21/8 3/4 Annulus

MARK III GROUP II 17/8 213/16 25/8 7/8 Annulus

MARK III GROUP III 25/8 33/8 35/8 1 AnnulusNOTE: All dimensions are for reference.

- Not to be used for seal or gland construction

CFMS/CBS A B Drilled D1 D2 E F G H1 H2 J1* J2* K1 K2

No. Size B.C.

MARK III GROUP I 13/8 25/8 4 3/8-16 31/4 25/32 25/32 23/16 3/16 21/8 3/8 Annulus 3/4 Annulus 115/16 115/16 215/32 215/32

MARK III GROUP II 17/8 31/8 4 3/8-16 33/4 3 3 25/8 3/16 25/8 3/8 Annulus 7/8 Annulus 21/2 21/2 27/8 27/8

MARK III GROUP III 25/8 41/4 4 1/2-13 51/2 319/32 327/32 31/4 3/16 35/8 1/2 Annulus 1 Annulus 31/8 33/8 39/16 35/16

*Face of seal chamber to end of optional shaft sleeve


15


ENTS

DurcoShield ™

PumpSafetyAccessory

Its transparency permits visualinspection of the seal area.

Optionally available in PVDF.

Applications from -70°F(-57°C) to 300°F (149°C).

Available for Mark II, Mark IIIand Chemstar® pumps.

This splash and shaftguard is a one-piece

shield that envelopes theopen areas between thebearing housing andthe casing. • Fluid spray from a

malfunctioning seal is deflected by the shield

• Provides protectionfrom the rotating shaftin the area of themechanical seal asrequired by safetyregulations of manycountries, including theUSA’s OSHA Section29 CFR 1910

DurcoShield is easy to install or toremove. Simply spread the shieldapart... fit around the bearing housing adapter... and snap intoplace. The spring-like tensionholds the shield firmly in place.

Protection from the potential dangers of:• Process fluid spray• Rotating shaft and seal components

This deviceis not a containmentsystem, nor aseal backup system. It is alimited protectiondevice. It will reduce,but not eliminate, theprobability of injury.

PATENT PENDING

Contact your local Flowserve representative today forcomplete information.

Slots or holes to accommodateseal support piping/tubing can beeasily located and drilled or cut.


16

Durco reverse vaneimpellers deliver

unequalled efficiencyand performance. Thisexclusive impeller designextends bearing andseal life.

• Low, predictable sealchamber pressureand thrust loadsresulting from backvane pumping actionand balance holes

• Low required NPSH,lowest overall of anystandard pump

• Rear cover plate wearsurface as the flow pathexits the rear of theimpeller, placing abra-sive wear on the rearcover rather than themore expensive casing

• In shop impelleradjustment with theonly impeller designthat takes full advantageof the back pull outfeature. Since the criti-cal running clearanceis set between the rearof the impeller and therear cover plate, bothimpeller and mechan-ical seal settings can bedone in the shop, “onthe bench,” instead ofunder adverse fieldconditions

• Repeatable perfor-mance assurance withthe only impeller designthat offers repeatabilityin seal chamber pres-sure and bearingthrust loads

Exclusive reverse vane impellerwith balance holes offersimportant performance enhancing,maintenance reducing advantages.

Front vane open style impelleris fully interchangeable with thereverse vane impeller. Excellentchoice for stringy and certainapplications requiring high shear

against the casing.

Note: Recessed impellerpumps offer excellentsolids handling capa-bilities. See pages 52-55for details.

In-shop impelleradjustment…practicalas well as productive!

Rear coverwear surfaceversus casingmeans lowerreplacementparts costs.

Low predictable sealchamber pressuremeans longer seal life.

Clearance is set to therear cover in the shop –not to the casing whichis left in the piping.

Lowest overallrequired NPSH ofany standard pump.

For Low Flow and/or HighHead Applications see page 18.

Clearacover iwith cain the p

Rear coverwear surfaceversus casingmeans betterreplacementparts costs.

ImpellerOptions


17

Only a Durco reverse vaneimpeller offers repeatableperformance after wearand impeller adjustment.

Performance Life Cycle:Durco Reverse VaneImpeller with Balance Holes Effects of Wear• Thrust loads decrease as

seal chamber gap widens• Chamber pressure

increases as gap widensEffects of ImpellerAdjustment to Seal Chamber• Original pressures and

loads re-established afteradjustment

• Repeatable MTBPM cyclelife

Reverse Vane Impeller

An impeller cannot beadjusted to two locations.

Seal and bearing life arereduced due to increasedloads after wear andmaintenance adjustment.

Performance Life Cycle:Front Vane Open StyleImpeller with PumpOut Vanes Effects of Wear• Thrust loads increase as

seal chamber gap widens• Chamber pressure

increases as gap widensEffects of ImpellerAdjustment to Casing• Chamber pressures and

bearing loads increaseafter each adjustment

• Non-repeatable MTBPMcycle life

Front VaneOpen Style Impeller

The reverse vaneimpeller has only oneset of pumping vanesand one critical toler-ance location – betweenthe impeller and rearcover – to establish:• Performance• Efficiencies• Seal chamber pressures

(i.e., mechanical sealMTBPM)

• Thrust/axial loads(i.e., bearing life)

Since an impeller canonly be set in onedirection, the reversevane impeller hasinherent advantages.

The front vane openstyle impeller has two sets of pumpingvanes and two criticaltolerance locations:• The front vane of the

impeller clearance tothe casing establishes:– performance– efficiencies

• The impeller pump outvanes clearance to therear cover establishes:– seal chamber

pressures andseal life

– thrust loads andbearing life

Only OneToleranceImpeller VanesTo Cover

PumpPerformanceVanes

PumpOutVanes

ReverseVaneImpellerAdjustment

FrontVaneImpellerAdjustment

Diminished Performance

Effects of Wear & Impeller Re-Adjustment

Thrust

Seal Chamber Pressure

Original Axial Thrust

Original Chamber Pressure

Cycles Reduce

Seal

Cha

mbe

r Pr

essu

re/A

xial

Thr

ust

Consistent, Like-New RepeatablePerformance

Effects of Wear & Impeller Re-Adjustment

Thrust

Seal Chamber Pressure

Original Axial Thrust

Original Chamber Pressure

Cycles Repeat

Seal

Cha

mbe

r Pr

essu

re/A

xial

Thr

ust


ENTS

Reverse VaneImpeller andRepeatablePerformance


100%

75%

50%

25%

0%0 100 200

0 25 50Lo-Flo

StandardFlow

Improved Pump Reliability with

Extended MTBPM at Low Flow Rates

Flowserve extends itsANSI pump design forhigh head/low flow rates.

• 1K1.5 x 1LF-4...introduced in 1984

• 1K1.5 x 1LF-8...New• 2K2 x 1LF-10...New• 2K3 x 1.5LF-13...NewOffered in a wideselection of metallurgy.

Low flow applications• Flows to 220 gpm

(50 m3/h)• Heads to 985 ft

(300 m)• Pressures to 450 psi

(3100 kPa)• Temperatures to

700˚F (370˚C)

(See compositeperformance curvepage 28)

Circular concentric casing and radial vaneimpeller with…“aunique twist.”

Extend MTBPM overstandard pumps

• Radial loads arereduced up to 90%at low flows

• Shaft vibration isreduced up to 50%(See graph)

• Bearing life isextended

• Mechanical seal life isextended

EXPANDINGVOLUTE CASING

CIRCULARCONCENTRICCASING

Durco superiorimpeller designprovides:

• Minimal thrust loads

• Reduced NPSHrequirements

• Low seal chamber pressures

• Standard Mark IIIAor ANSI 3A™ powerends

• Broader applications range

• Longer seal and bearing life

Conforms to standard ANSIdimensions

Standard Mark IIIpower end maximizes interchangeability

Perc

ent

of m

axim

um v

ibra

tion

of t

he s

tand

ard

pum

p

gpm

m3/h

SHAFT VIBRATION

18

DurcoMark III Lo-Flo™

Pumps


19

Item Part Typical Size

I Casing Drain 3/4 in (19 mm)-10, 1/2 in (13 mm) NPT, 3/4 in (19 mm) NPT

II Suction Nozzle Gage Connection 1/4 in (6 mm) NPT

III Discharge Nozzle Gage Connection 1/4 in (6 mm) NPT

IV Connection for Line to Seal Chamber 1/4 in (6 mm) NPT

V Connection for Line to Seal Chamber 1/4 in (6 mm) NPT

VI Flush Connection for Mechanical Seal 1/4 in (6 mm) NPT

VII Bottom Tap in Seal Chamber 1/4 in (6 mm) NPT

Centerline mounted casingsmay be used to reduce loadscaused by thermal expansion.Jacketed feet with inlet/outletcoolant ports further assureeffective temperature control.

Optional Connections

Standard casings havefully machined wet face.

Flange optionsinclude: 150 lb flat flanges(standard); 300 lb flat flanges;and raised face flanges.

Durco casing flanges arefinished in accordance withthe ASME/ANSI B16.5standard which, insummary, says that thesurface must have aserrated finish having from24 to 40 grooves per inch(25 mm), and the surfacefinish must have a 125µ into 500µ in roughness.

Jacketed casings for temper-ature control. Integral jacketedcasing is shown here. Alsoavailable: Bolt-on aluminumjackets; and thermonized heattransfer tubes.

Flange DrillingStandard Class 150 Optional Class 300

Size Hole Size B.C. Hole Size B.C.in (mm) No. in (mm) in (mm) No. in (mm) in (mm)

1 (25) 4 5/8 (16) 3-1/8 (79) 4 3/4 (19) 3-1/2 (89)1-1/2 (40) 4 5/8 (16) 3-7/8 (98) 4 7/8 (22) 4-1/2 (114)

2 (50) 4 3/4 (19) 4-3/4 (121) 8 3/4 (19) 5 (127)3 (80) 4 3/4 (19) 6 (152) 8 7/8 (22) 6-5/8 (168)4 (100) 8 3/4 (19) 7-1/2 (190) 8 7/8 (22) 7-7/8 (200)6 (150) 8 7/8 (22) 9-1/2 (241) 12 7/8 (22) 10-5/8 (270)8 (200) 8 7/8 (22) 11-3/4 (298) 12 1 (25) 13 (330)10 (250) 12 1 (25) 14-1/4 (362) 16 1-1/8 (29) 15-1/4 (387)

Class 150 smooth flat face is standard.Class 300 smooth flat face and Class 150and Class 300 raised faces are available.

TAP VI(AVAIL. GR II 10 &13'',GR III)

TAP V (1/4 NPT.STD.)

TAP VII

TAP III

TAP II

TAP IV(OPP.)SIDE)

TAP I

TAPIV


ENTS

DurcoMark III CasingOptions

Pressure/Temperature RatingFor Cast Jackets on Pump – Casing, Cover, and Stuffing Box

JACKET – TEMPERATURE °F

Hydrostatic Test Pressure is150% of Rated Pressure at-20 to 100°F

JAC

KE

T P

RE

SS

UR

E –

P.S

.I.G

.


20

DurcoMark IIIPump/MotorShaftAlignment

U ltralign™ C-flangeadapter with the

C-Plus precision align-ment option deliversfast, repeatable, pre-cisely accurate pump/motor shaft alignment.

Standard Footed Motors• Special machine-cut C-Face

of assembled unit ensuresshaft perpendicularity

• Motor is cantilevered, orfree hung. (Footed designprovides support duringshipping.)

• Tested and proven through405TC frame to 100 hp(75 kW), to ensure rigidassembly and freedom fromexcessive vibration anddeflection

C-Flange Adapter• Parallel shaft alignment of

0.007 in (0.18 mm) nominalas governed by tolerancestackups

• Angular shaft alignmentwithin 0.001 in/in(0.001 mm/mm)

Rigid Coupling Guard SidePlates Exceed ASME B15.1Requirements And PermitsVisual Indication Of Rotation

Motor And BearingHousing Foot MountingTo Base Is Not RequiredOr Recommended• Reduces soft foot potential• Helps eliminate alignment

distortion caused byfulcrum effect of soft footbolting to the base

• Optimizes the ability ofthe C-Flange design tomove the motor with thepump shaft, maintainingalignment

Flowserve’s Unique C-PlusPrecision Alignment Systemwith Four-Point MotorAdjustmentTo achieve the best processpump and motor MTBPMrequires shaft alignments ofless than 0.002 in (0.05 mm).But the stackup tolerances ofeven the most perfectly craftedC-Flange adapted pump andmotor package can oftenproduce misalignments up to0.015 in (0.38 mm). Flowserve’sunique C-Plus precision align-ment system routinely deliversshaft alignments below 0.002 in (0.05mm) in less than thirty minutes.

Adjustable Rigid FootMount• Assures accurate

alignment to thebaseplate and piping

• Designed to supportall normal loads

MotorAdapter

MotorMountingStudNut

SpacerRing

Jam NutMotorAdjuster


With special attentionto materials and

component options MarkIII pumps can be used tohandle liquids ranging intemperature from as lowas -200°F (-129°C) to ashigh as 700°F (371°C).

It is always essentialthat the pressure andtemperature of the appli-cation never exceed thepressure/temperaturelimits of the pump. Theselimits may be found in thechart on page 30 of thisbulletin.

Operation at either low or high temperaturescould require modificationof the standard pumpdesign to provide strengthof materials for pressurecontainment and resis-tance to thermal shock, a method for cooling orheating pump components,mechanical seal protec-tion, special gaskets, and/or maintenance of pump/motor shaft alignment.

The Ultralign C-flangemotor adapter is recom-mended on any applicationwith temperature fluctua-tions of more than 100°F(38°C).

Low TemperatureApplicationsSpecial recommendationsfor temperatures < -20°F(-29°C)Casing: Stainless steelalloys with jacketing.Seal Chamber: Stainlesssteel with jacketing. Seal-Sentry designs with cus-tomized seal and flushplan as required by theapplication.Shaft and Sleeve: Stainlesssteel alloy with optionalreplaceable alloy sleeves.Friction welded 1144/ 316(ZH) is recommended.Gaskets: Temperature/liquid compatible.Coupling: Flexiblemember spacer-type.Power End: Stainless steelbearing housing and adap-ter. ANSI 3A with syntheticlubricant recommended.

DurcoMark IIISpecificationsFor LowAnd HighTemperature Services

Centerline mounted casing

Jacketed casing

Jacketed SealSentry sealchambers

Cooling coil oiltemperature control

Ultralign C-flange motoradapter (See page 18)

Jacketed standard bore(CBS) is recommendedwhen cooling the sealchamber is the objective.

Jacketed FM chamber ispreferred when protectionof the process tempera-ture is important.

High TemperatureModificationsSpecial recommendationsfor temperatures >300°F(149°C)Casing: For heat transferliquids, recommend using300 lb flanges. Tempera-tures >300°F (149°C)require Grafoil® impellerand casing gaskets. IfUltralign heavy-duty rigiddesign C-flange adapter isnot used and tempera-ture is >350°F (177°C),then centerline mountingof the casing with coolingof mounting legs is recom-mended. If Ultralign isused, centerline mountingis not recommended untiltemperature exceeds500°F (260°C).Rear Cover: For tempera-tures >350°F (177°C)jacketing is recommended.In addition, CBL or CBSwith throat bushing isrecommended to allowcooling jacket to bemore effective.Shaft: Friction welded1144/316 (ZH) isrecommended.Bearing housing: ANSI3A power end is recom-mended. For tempera-tures >350°F (177°C)oil cooling system isrecommended. Fortemperatures >500°F(260°C), stainless steelbearing housings arerequired on Group 1pumps and stainless steeladapters are required onGroup 2 and 3 pumps.Baseplate: Rigid rein-forced base with stilt/spring mounting.Motor mounting:Ultralign C-flange adapteris recommended onGroups 1 and 2. Hotalignment is alwaysrecommended.

® Grafoil is a registered trade-mark of Union CarbideCorporation

21


ENTS


22

DurcoMark IIIBaseLine™

BaseplateSystem

Baseplate Rigidity Test –Twist Mode

A

D

E

BC

0 100 200(45) (91)

Load - lb (kg)

Defle

ctio

n –

inch

(mm

)

Type A 0.022 in (0.56 mm)

Type B 0.004 in (0.01 mm)

Type C 0.003 in (0.08 mm)

Type D 0.016 in (0.41 mm)

Type E 0.005 in (0.13 mm)

Maximum Parallel ShaftDeflection At Applied Force

Baseplates ProvideThe Backbone forExtended MTBPMThe test stand providedthree corner support ofthe ungrouted baseplates.The addition of weightson the unsupportedfourth corner causedbaseplate distortion.This distortion resultedin measurable shaftmovement that cancause problems withfield installations andnegatively affect MTBPM.

The twist test is ameans of comparingrigid baseplate designs.Correctly installed rigidbaseplates should notexperience these twisteffects. For more infor-mation about the resultsof baseplate testingcontact the localFlowserve salesrepresentative.

Flowserve offers a family of five (5)

types of pre-engineeredbaseplate designs toextend MTBPM andreduce costs.

Reducing internal stressand vibration extendsMTBPM of pump/motorpackages.Pump users specify rigidbaseplate designs to:• Provide torsional

lateral and longitudinalrigidity

• Improve vibrationdampening throughgreater mass anddesign stiffness

• Protect against transitdamage

• Resist twisting duringinstallation

• Maintain designed-inshaft alignment

• Reduce installation andshaft alignment time

• Reduce diaphragmingor separation fromgrout

• Improve pump/motor/seal MTBPM

• Reduce total life cyclepump/motor/seal costs

BaseLine can handlethe stress. Rigid designbegins with thick plateconstruction.Metal baseplate sizes:• 139 to 258 feature

1/2 in (13 mm) steelplate construction

• 264 to 280 feature5/8 in (16 mm) steelplate construction

• 368 to 398 feature3/4 in (19 mm) steelplate construction

Polybase baseplates are constructed of 3 in (76 mm) to 4 in (102 mm)solid polymer concrete.Baseplate Types B, C, Dand E are reinforced withadded structural supportfor improved rigidity.

Baseplates A through Eare shown on pages 24through 27.

0.070 (1.78)

0.060 (1.52)

0.050 (1.27)

0.040 (1.02)

0.030 (0.08)

0.020 (0.51)

0.010 (0.25)

0.000 (0.00)


23

Most Commonly Requested Baseplate Features

Durco Baseplate DimensionsSpecify (new) ANSI B73.1M-1991 dimensions to avoid costly confusion between manufacturer and designer.

*13 in (330 mm) wide sizes are 35/8 in (92 mm) thick, 26 in (660 mm) wide sizes are 41/4 in (108 m) thick, while remaining sizes are 4 in (102 mm) thick.

Durco ANSI Durco ANSI Polybase*

Pump Min./ Overall Anchor Pump Min./ Overall AnchorSize Base Max. Dimensions Bolt C Size Base Max. Dimensions Bolt C

Group No. NEMA LxW LxW Group No. NEMA LxW LxWFrame inches (mm) inches (mm) Frame inches (mm) inches (mm)

1K 139 143T 39 x 15 361/2 x 9 1K 139 143T 39 x 13 361/2 x 9184T (991 x 381) (927 x 229) 184T (991 x 330) (927 x 229)

148 256T 48 x 18 451/2 x 12 148 256T 48 x 16 451/2 x 12(1219 x 457) (1156 x 305) (1219 x 406) (1156 x 305)

153 326T 53 x 21 501/2 x 15 153 326T 53 x 19 501/2 x 15(1346 x 533) (1283 x 381) (1346 x 483) (1283 x 381)

2K 245 184T 45 x 15 421/2 x 9 2K 245 184T 45 x 13 421/2 x 9(1143 x 381) (1080 x 229) (1143 x 330) (1040 x 229)

252 215T 52 x 18 491/2 x 12 252 215T 52 x 16 491/2 x 12(1321 x 457) (1257 x 305) (1321 x 406) (1257 x 305)

258 286T 58 x 21 551/2 x 15 258 286T 58 x 19 551/2 x 15(1473 x 533) (1410 x 381) (1473 x 483) (1410 x 381)

264 365T 64 x 22 611/2 x 15 264 365T 64 x 22 611/2 x 15(1626 x 559) (1562 x 381) (1626 x 559) (1562 x 381)

268 405TS 68 x 26 651/2 x 19 268 405TS 68 x 26 651/2 x 19(1727 x 660) (1664 x 483) (1727 x 660) (1664 x 483)

280 449TS 80 x 26 771/2 x 19 280 449TS 80 x 26 771/2 x 19(2032 x 660) (1969 x 483) (2032 x 660) (1969 x 483)

3K 368 286T 68 x 26 651/2 x 19 3K 368 286T 68 x 26 651/2 x 19(1727 x 660) (1664 x 483) (1727 x 660) (1664 x 483)

380 405T 80 x 26 771/2 x 19 380 405T 80 x 26 771/2 x 19(2032 x 660) (1969 x 483) (2032 x 660) (1969 x 483)

398 449T 98 x 26 951/2 x 19 398 449T 98 x 26 951/2 x 19(2489 x 660) (2426 x 483) (2489 x 660) (2426 x 483)

Item Standard Options Type A Type B Type C Type D Type D Type ENo. Gp I & II Gp III with Rim

1 Machined coplanar mounting surfaces to 0.002 in/ft O O O O O O Y(0.17 mm/m) with 125µ in (3.2 micron) finish

2 Added structural (cross member) support N N Y Y Y Y Y3 Added torsional support with end caps NR Y Y D O O Y4 Tapped holes for four (4) motor adjuster bolts O O O Y O O Y5 Four (4) - SS transverse jack bolts - motor adjusters O O O Y O O Y6 Sloped surface to an integral drain 1 in (25 mm) N N C N N N Y7 Integral sloped drip rim around base N N N N N Y Y8 4 in (102 mm) diameter grout holes -

max. 30 in (762 mm) run to vent Y Y Y N Y Y Y9 1/2 in (13 mm) vent holes at corner of each chamber NR O NR NA Y Y Y

10 Lower surface shaped to anchor in grout N N N NA Y Y Y11 Integral lifting eyes at four (4) corners O Y O O Y Y Y12 Tapped leveling holes four (4) corners O O N S Y Y Y13 Continuous seam weld construction NA Y NA O Y Y Y14 Welded raised lip around grout hole(s) NR NR NR NA NR NR O15 Stilt mounting options with floor cups NR NR O Y D D D16 Spring mounted load designs NA NA O O D D D17 Catch basin (304SS or other materials) O O O O O NR Y18 Option for eight (8) total motor adjusters D D O D D D D19 Dimensions to ANSI B73.1M-1991 Y Y Y Y Y Y Y

Y =Standard N =Not available NR=Not recommended D=Needs design timeO=Optional NA=Not applicable C =Sloped catch basin with 1 inch (25 mm) drain (option) S =Stilts for leveling

See pages 24-27 for BaseLine model descriptions

BaseLine™ANSI PUM

P & ENHANCEMENTS


24


BaseplateSystem

Type A

Standard Baseplate,Foundation or StiltMounted

1/2 in (13 mm) platethrough #258 size5/8 in (16 mm) platethrough #280• Designed for grout

installation with 4 in(102 mm) diameterhole

• Stilt mounting recom-mended only on mini-mal stress installations

• Stilt cross bars 1 in(25 mm) thick locatedat ends, mountedthrough anchor boltholes

• Not available withspring load Style Dstilts

Group III• 3/4 in (19 mm) top

plate constructionall sizes

• Side plate and rein-forcement members1/2 in (13 mm)

• Designed for groutinstallations with4 in (102 mm)diameter holes

BaseplateOptionsOptional SteelMounting BlocksBelow 25/8 in (67 mm)In HeightSolid machined steelbar. Polybloc™ unitsare Flowserve’sstandard (page 25).

Optional MountingBox 25/8 in (67 mm)And Above In Height3/8 in (10 mm) min.seam welded plate.Mounting blocks areoptional.

Drip Rim Pump EndOnly Type A and CFor full rim use Type Dwith drain rim.

304SS Catch BasinType A, C, and D.

Traditional MotorAdjuster Jack BoltsTo align shafts to criticaltolerances with minimaldisturbance of indicators.See Flowserve’s newstandard motor adjuster –8-Point™ Adjuster (page 25).

Centering Nut – FactoryPre-Alignment ProcedureAll assemblies are pre-aligned at the factory usingcentering nuts which arereplaced with fastener nutsfor shipment. This allowsthe maximum movementof the motor in the field toavoid bolt binding duringfinal shaft alignment efforts.


25

DurcoSolidPolymerConcretePolybase™

8-Point™Adjuster• Allows precise

motor adjust-ment to reducealignment time

• Used withrecessed bloc-lock device

• Can be used tohelp lock motorin place oncealignment isestablished

Polybloc™ – MotorMounting Block• Flatter and more

repeatable heighttolerances than steel

• Corrosion resistant• Superior vibration

dampening• Full foot support (no

overhang)• Shown with optional

Bloc-lock and fastenersupport

• Available for alternateequipment applications

Polybase• Low installed cost• Superior vibration

dampening• Corrosion resistant• Superior resistance to

twisting ordiaphragming

• Designed to be flat• Available with or with-

out catch basin orgrout holes

• Inserts can be locatedto mount alternateequipment configura-tion requirements

Solid cast reinforcedpolymer constructionmakes Polybase ex-tremely strong andrigid. It easily handlespump and motorloads without flexingproblems commonlyassociated with castiron or FRP baseplates.

Its excellent corro-sion resistant propertiesenable it to outperformand outlast typical castiron or even steelbaseplates.

• Polybase is availablewith or without catchbasin or grout holes

• Inserts can be locatedto accommodatevarious pump/motortype configurations

• Polybloc is availablefor alternate equip-ment applications

Type B

Foundation or Stilt Mounted

Featuring Durco SolidPolymer ConcretePolybase™ and Polybloc™Adjustment System

Vibration DampingComparisonThe extraordinary vibrationdamping characteristics ofpolymer concrete signif-icantly reduce wear andtear on pumps, seals andmotors. Greater dampeningcharacteristics mean easiervibration analysis duringpreventive maintenance.

Vibration damping of polymerconcrete versus cast iron.

Cast Iron0.125 Sec.

Polymer Concrete0.125 Sec.

© John F. Kane, Composites Institute,The Society of the Plastics Industry, Inc.


ENTS

Motor Foot

Adjuster Bracket

TransverseJack Bolt(Axial JackBolt is at 90°,not shown)

Shim Allowance

Jam Nut

Polybloc

Baseplate

All-ThreadMounting Stud


26

Type C

Reinforced Baseplate,Stilt Mounted• Reinforced with 1/2 in

(13 mm) bottom plate• Gussets add strength

and dampen vibration• Standard with four (4)

tapped holes for motoradjuster jack bolts

• Designed without grouthole for maximumstrength

• Stilts located undercenter of pump andcenter of motor

Group IIIGroup III has similar profile toStandard Type A baseplate.Note the addition of extensivestructural support and theadded features that are stan-dard with the Type C design.

Group III has similar profile toStandard Type A baseplate.Note the addition of extensivestructural support and theadded features that are stan-dard with the Type D design.

Type D

Reinforced Baseplate,Foundation Mounted• End caps are a

recommended optionto add stiffness

• I-beam adds torsionalrigidity and anchorsgrout

• Bottom allows com-plete grout contact

Reinforced Baseplate with DrainRim• Drain rim is sloped to

1 in (25 mm) drain

Special Support of Sizes 268 and 280• Cross bracing provided• Cross bars added• Additional gussets


BaseplateSystem


27

Type E

“Ten Point” Heavy-Duty Foundation• Ten major features are

standard (See chartpage 23)

• Extensive doublereinforcement

Style

AFor Types A, B, and

C Baseplate3/4 in (19 mm) rod;

35/8 in (92 mm) to 9 in (229 mm) height

Group III = 1 in(25 mm) rod

Style

CFor Types A, B, and C Baseplate2 in (51 mm) pipe withcross bracing>161/2 in (419 mm)height

Style

DWith Spring Load For Types B and CBaseplate91/2 in (241 mm) to 111/2 in (292 mm) height

Style

BFor Types A, B, and

C Baseplate2 in (51 mm) pipe;

9 in (229 mm) to 161/2 in (419 mm)

height

Stilt with FloorCup Options

Optional PTFESlide Plate(adds 115/32 in (38mm) to height)

Group III has similarprofile to Standard Type A baseplate. Notethe addition of extensivestructural support andthe added features thatare standard with theType E design.

API 610 Comments• Sometimes specified

for rigidity and specialfeatures

• Types B, D, and Emeet the intent of API610 rigidity

• Type E offers all designcriteria except grouthole is 4 in (102 mm)

Grouted BaseplateInstallations• Better dissipation of

vibration• Better resistance to

torsional stress• Best design if piping

designed and installedfree of stress loads

• Pipe loads stress pumpand cause greater mis-alignment with themotor shaft, etc.

Rigid Stilt MountedInstallations• Better relief of pipe

load stress• Pump moves to point

of least resistance• Lowest installation

cost– Base must supplyadded rigidity– Vibration levels arehigher than in groutedinstallations

diameter vs. 19 in2

(123 cm2) and our ventholes limit to 30 in(762 mm) maximumrun vs. 18 in (458mm). Raised liparound grout hole isan option

Benefits of EpoxyGrout• Better corrosion

resistance• Less shrinkage• Better bond to prop-

erly prepared base• Better long-term life

cycle costs• Superior vibration

dampening

• Bottom allows com-plete grout contact andgrout anchoring


ENTS


28

m

320

280

240

200

160

120

80

40

0

ft1120

1040

960

880

800

720

640

560

480

400

320

240

160

80

0

TD

H –

350

0 R

PM

(60

Hz)

m

80

60

40

20

0

ft300

250

200

150

100

50

0

TDH

– 1

750

RP

M (6

0 H

z)

Mark III Standard Mark III Standard Group I11/2x1LF-4

11/2x1-6

3x11/2-6

3x2-6

11/2x1LF-8

11/2x1-8

3x11/2-8

Mark III Standard Group II3x2-8

4x3-8

2x1LF-10

2x1-10A

3x11/2-10A

3x2-10A

4x3-10

4x3-10H

6x4-10

6x4-10H

3x11/2LF-13

3x11/2-13

3x2-13

4x3-13

4x3-13HH

6x4-13A

Mark III Standard Group III8x6-14A

10x8-14

6x4-16

8x6-16A

10x8-16

10x8-16H

10x8-17*

*Max. speed 1450 RPM

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

1

23 4

987

6

5

10

1112

1314

16

21

19

20

18

1

2 34

9876

5

10

11 12 13

14

1516

17

21

22

23

26

2427 25 28

29

19 20

18 SC

ALE

CH

AN

GE

FLOW – 2900 RPM (50 Hz)0 20 40 60 80 100 120 140 160 180 200 220 240 260 m3/h

0 200 400 600 800 1000 gpm ft

750

600

450

300

150

0

m

200

150

100

50

0T

DH

– 2

900

RP

M (

50 H

z)0 200 400 600 800 1000 1200 1400 gpm

0 50 100 150 200 250 300 m3/hFLOW – 3500 RPM (60 Hz)

FLOW – 1450 RPM (50 Hz)0 50 100 150 190 500 800 1100 1400 m3/h

0 200 400 600 800 2300 3800 5300 6800 gpmft

200

150

100

50

0

m60

50

40

30

20

10

0

TDH

– 1

450

RP

M (5

0 H

z)

0 200 400 600 800 1000 2800 4600 6400 8200 gpm

0 50 100 150 200 227 400 800 1200 1600 m3/hFLOW – 1750 RPM (60 Hz)

PerformanceCurves


Mark III Standard Group III

The thirty (30) pumpsin the Mark III family

are built with only threedifferent power frames.SealSentry provides achoice of five (5)different seal chamberoptions to best meetcustomers’ specificneeds.

29

Interchange-ability

Mark III Standard Group I

Mark III Standard Group II

• •• • •• • •

• • • • •• •

• • •• • •

PO

WE

R E

ND

RE

AR

CO

VE

RS

RE

VE

RS

E V

AN

EIM

PE

LLE

RS

FR

ON

T V

AN

E

OP

EN

ST

YLE

IMP

ELL

ER

S

CA

SIN

GS

• • •• • • • •• •

• • •• • •• • •

• • • • • •• • •• • •• • •

• •• • •• • •

• • • • •• •• • •

PO

WE

R E

ND

RE

AR

CO

VE

RS

AD

AP

TE

RS

RE

VE

RS

E V

AN

EIM

PE

LLE

RS

FR

ON

T V

AN

EO

PE

N S

TY

LEIM

PE

LLE

RS

CA

SIN

GS

11/2X1LF-4

11/2X1-6

3X11/2-6

3X2-6

11/2X1LF-8

11/2X1-8

3X11/2-8

3X2-8

4X3-8

2X1LF-10

2X1-10A

3X11/2-10A

3X2-10A

4X3-10

4X3-10H

6X4-10

6X4-10H

3X11/2LF-13

3X11/2-13

3X2-13

4X3-13

4X3-13HH

6X4-13A

• • •• • • • •• • •• • •• • • • • •• • •

• • • •

PO

WE

R E

ND

RE

AR

CO

VE

RS

AD

AP

TE

RS

RE

VE

RS

E V

AN

EIM

PE

LLE

RS

FR

ON

T V

AN

EO

PE

N S

TY

LEIM

PE

LLE

RS

CA

SIN

GS

8X6-14A

10X8-14

6X4-16

8X6-16A

10X8-16

10X8-16H

10X8-17

OR

OR

OR

TECHNICAL DATA


PressureTemperatureRatings

30

300

250

200

150

100

50

2000

1750

1500

1250

1000

750

500

250

-50 0 50 100 150 200 250 300 350

-100 0 100 200 300 400 500 600 700

DS CD4M TIDC2 TIPDC3 ZR

D4D4L

D2D2L

DCI

DINC

D20

DNI

DM

CLASS 150 MARK III PUMPSBASED ON ANSI B16.5

GROUP I & IICLASS 300 MARK III PUMPSBASED ON ANSI B16.5GROUP IIICLASS 300 MARK III PUMPSLIMITED TO CLASS 150RATINGS

CD4MUPPER LIMIT

DCIUPPER LIMIT

DSDCI LOW TEMPERTURELIMIT

-50 0 50 100 150 200 250 300 350

-100 0 100 200 300 400 500 600 700

350

300

250

200

150

100

2250

2000

1750

1500

1250

1000

750

500

D20 DC3CD4M DMD4 DSD4L DINCD2 TID2L TIPDC2 ZR

DNI

CD4MUPPER LIMIT

DSLOWTEMPERATURELIMIT

TEMPERATURE – °CM

AX

. DIS

CH

AR

GE

PR

ES

SU

RE

– lb

f/in

2M

AX

. DIS

CH

AR

GE

PR

ES

SU

RE

– lb

f/in

2

MA

X. D

ISC

HA

RG

E P

RE

SS

UR

E –

kP

aM

AX

. DIS

CH

AR

GE

PR

ES

SU

RE

– k

Pa

TEMPERATURE – °F

TEMPERATURE – °C

TEMPERATURE – °F


31

TECHNICAL DATA

SuctionPressureRatings

Curves shown are forstandard double rowoutboard bearings.Duplex angular contactbearings normally willallow higher suctionpressures. ContactEngineering for moreinformation.


32

Min. Max. Sphere ImpellerCasing Thru Imp. Eye Area

Pump Pump Thickness Rev. Vane Open Rev. Vane OpenGroup Size in (mm) in (mm) in (mm) in2 (cm2) in2 (cm2)

1K11/2x1LF-4 3/8 (10) N/A 1/4 (9) N/A 0.80 (5)1K11/2x1-6 3/8 (10) 3/8 (10) 13/32 (10) 3.1 (20) 3.6 (23)1K3x11/2-6 3/8 (10) 7/16 (11) 7/16 (11) 4.4 (28) 4.4 (28)

GP I 1K3x2-6 3/8 (10) 7/16 (11) 3/8 (10) 5.6 (36) 7.0 (45)1K11/2x1LF-8 3/8 (10) N/A 1/4 (9) N/A 2.4 (15)1K11/2x1-8 3/8 (10) 11/32 (9) 15/32 (12) 3.1 (20) 3.7 (24)1K3x11/2-8 7/16 (11) 9/16 (14) 13/32 (10) 5.5 (36) 5.3 (34)

2K3x2-8 7/16 (11) 17/32 (14) 9/16 (14) 6.8 (44) 7.0 (45)2K4x3-8 7/16 (11) 1/2 (13) 1/2 (13) 12.4 (80) 12 (77)

2K2x1LF-10 7/16 (11) N/A 13/16 (21) N/A 2.4 (15)2K2x1-10A 7/16 (11) 13/32 (10) 5/16 (8) 3.5 (23) 4.1 (26)

2K3x11/2-10A 7/16 (11) 15/32 (12) 15/32 (12) 5.5 (35) 5.6 (36)2K3x2-10A 7/16 (11) 17/32 (14) 7/16 (11) 6.4 (41) 6.4 (41)2K4x3-10 1/2 (13) 21/32 (17) 9/16 (14) 13.2 (85) 12 (77)

GP II 2K4x3-10H 1/2 (13) 25/32 (20) 11/16 (18) 13.2 (85) 10.3 (66)2K6x4-10 1/2 (13) 11/16 (18) 5/8 (16) 19.6 (127) 19.6 (127)

2K6x4-10H 1/2 (13) 9/16 (14) 5/8 (16) 22 (142) 26.5 (171)2K3x11/2LF-13 7/16 (11) N/A 5/16 (8) N/A 4.9 (32)2K3x11/2-13 7/16 (11) 19/32 (15) 3/8 (10) 7.5 (48) 6.1 (39)

2K3x2-13 7/16 (11) 13/32 (10) 13/32 (10) 7.5 (48) 7.9 (51)2K4x3-13 7/16 (11) 11/16 (18) 11/16 (18) 15.2 (98) 12.5 (81)

2K4x3-13HH 7/16 (11) 11/16 (18) N/A 15.2 (98) N/A2K6x4-13A 7/16 (11) 11/32 (26) 1 (25) 29 (187) 29.1 (188)3K8x6-14A 1/2 (13) 15/8 (41) 11/4 (32) 45.3 (292) 44.7 (288)3K10x8-14 5/8 (16) 11/2 (38) 11/4 (32) 63.6 (410) 59.6 (385)3K6x4-16 5/8 (16) 13/16 (30) 11/16 (27) 26.7 (172) 26.7 (172)

GP III 3K8x6-16A 9/16 (14) 11/4 (32) 11/4 (32) 45.3 (292) 41.8 (270)3K10x8-16 9/16 (14) 19/16 (40) 11/4 (32) 63.6 (410) 64.4 (415)

3K10x8-16H 1/2 (13) 15/8 (41) 11/4 (32) 78.5 (506) 78.7 (508)3K10x8-17 9/16 (14) 19/16 (40) N/A 71.8 (515) N/A

Mechanical Properties

Durco Durco ACI Equivalent Wrought ASTM Tensile Strength, Yield Point Min. % Nominal HardnessDesignation Symbol Designation Designation Specifications* min., psi MPa min., psi MPa Elongation (Brinell)Ductile Iron DCI None None A395 60,000 414 40,000 276 18 143-187Carbon Steel DS None Carbon Steel A216 Gr. WCB 70,000 483 36,000 248 22 150Durco CF-8 D2 CF-8 304 A744 & A351, Gr. CF-8 70,000 483 30,000 207 35 150Durco CF-3 D2L CF-3 304L A744 & A351, Gr. CF-3 70,000 483 30,000 207 35 150

Durco CF-8M D4 CF-8M 316 A744 & A351, Gr. CF-8M 70,000 483 30,000 207 30 154Durco CF-3M D4L CF-3M 316L A744 & A351, Gr. CF-3M 70,000 483 30,000 207 30 154Durcomet 100 CD4M CD-4MCu Ferralium A744 & A351, Gr. CD-4MCu 100,000 690 70,000 483 16 224

Durimet 20 D20 CN-7M Alloy 20 A744 & A351, Gr. CN-7M 62,000 428 25,000 172 35 133Durco CY-40 DINC CY-40 Inconel 600 A494, Gr. CY-40 70,000 483 28,000 193 30 147Durco M-35 DMM M-35-1 Monel 400 A494, Gr. M-35-1 65,000 448 25,000 172 25 130

Nickel DNI CZ-100 Nickel 200 A494, Gr. CZ-100 50,000 345 18,000 124 10 118Chlorimet 2 DC2 N-7M Hastelloy B A494, Gr. N-7M 76,000 525 40,000 276 20 180Chlorimet 3 DC3 CW-6M Hastelloy C-276 A494, Gr. CW-6M 72,000 497 40,000 276 25 180Durco DC-8 DC8 None None None 300

Titanium Ti None Titanium B367, Gr. C-3 65,000 448 55,000 380 15 200Titanium-Pd Ti-Pd None Titanium-Pd B367, Gr. C-8A 65,000 448 55,000 380 15 200Zirconium Zr None Zirconium B752, Gr. 702C or 705C 55,000 380 40,000 276 12 190

Max. Temp. Max. Temp. Max.Coros. Min. w/o with Max. Allow. Horsepower Shaft BearingAllow. Temp. Cooling Cooling 1150 1750 3500 End Play Size

in (mm) °F (°C) °F (°C) °F (°C) hp (kw) hp (kw) hp (kw) in (mm) (SKF)1/8 (3) -20 (-29) 500 (260) 500 (260) 13 (10) 20 (15) 40 (30) 0.001 (0.03) (I.B.)

to -350 to 700 to 700 6207C3(-212) (350) (350) (O.B.)with with with 5306AC3

modif. modif. modif.

1/8 (3) -20 (-29) 350 (175) 500 (260) 50 (38) 75 (56) 150 (112) 0.001 (0.03) (I.B.)to -350 to 700 6310C3(-212) (350) (O.B.)with with 5310AC3

modif. modif.

1/8 (3) -20 (-29) 350 (175) 500 (260) 210 (157) 325 (242) – 0.001 (0.03) (I.B.)to -350 to 700 6314C3(-212) (350) (O.B.)with with 5314AC3

modif. modif.

6x4-10 maximum 175 hp (130 kW)

*Whenever an ASTM specification is cited, the Durco alloy will conform to the chemical and mechanical requirements of the latest edition of the specification.

DurcoMark IIIGeneralTechnicalData


* In some cases, the 3K6x4-16 can be used at lower than 50% of BEP, by making animpeller modification. Contact Dayton Engineering if there is a need to use this pump at alower flow.

Flowserve Definition:Minimum contin-

uous stable flow is thelowest flow at which thepump can operate andstill conform to the bear-ing life, shaft deflectionand bearing housingvibration limits of ANSI/ASME B73.1M-1991.

Minimum continuousthermal flow is thelowest flow at whichthe pump can operateand still maintain thepumped liquid temper-ature below that whichwill have an adverseeffect on the pump orseal performance, oron the quality of thepumped liquid.

The minimum flow forDurco Mark III standardpumps is 10% of BEP,except those listed intable at left.

DurcoMark IIIMinimumFlow &FastenersMinimum Continuous Flow

60 Hz 50 HzMin. Flow Min. Flow

Pump Size RPM (% of BEP) RPM (% of BEP)

1K3X2-6 3500 25% 2900 21%2K3X2-8 3500 25% 2900 21%2K4X3-8 3500 25% 2900 21%2K3X2-10 3500 33% 2900 28%2K4X3-10 3500 33% 2900 28%2K6X4-10 3500 50% 2900 42%2K3X2-13 3500 50% 2900 42%2K4X3-13 3500 50% 2900 42%2K6X4-13HH 1750 50% 1450 42%2K6X4-13 1750 50% 1450 42%ALL GROUP 3 PUMPS* 1750 50% 1450 42%ALL OTHER SIZES ANY 10% ANY 10%LO-FLO PUMPS Governed by minimum thermal flow only

Flowserve Standards for Pressure Containing Fasteners

Pump Alloy Type of Fastener New Alloy Code Description

Alloy/Non-metallic Casing Fastener B7TF* ASTM A193 Grade B7 (AISI 4140, 4142,4145, 4140H, 4142H, or 4145H steelw/PTFE coating & Zinc rich primer)

Casing Nut SRTF* ASTM A194 Grade 2H (Carbon Steelw/PTFE coating & Zinc rich primer)

Gland Fastener B81 ASTM A193 Grade B8 class 1 (304stainless steel)

Gland Nut E8 ASTM A194 Grade 8 (304 stainless steel)

Cover/Repeller Cover B7TF* same as aboveFastener (Sealmatic)

High Silicon Iron HSI Pump Fasteners In general, same materials as alloy pump(HSI) fasteners listed above

Stuffing Box Yoke B81 same as aboveFastener (HSI)

Stuffing Box Yoke E8 same as aboveNut (HSI)

Carbon Steel or Casing Fastener B7* ASTM A193 Grade B7 (AISI 4140, 4142,Ductile Cast Iron 4145, 4140H, 4142H, OR 4145H steel)(DS/DCI) Casing Nut SR2H* ASTM A194 Grade 2H (Carbon Steel)

Gland Fastener B81 same as above

Gland Nut E8 same as above

Cover/Repeller Cover B7* same as aboveFastener (Sealmatic)

Mag Drive Shell/Holder Fastener B7TF* same as above

Shell/Ring Fastener B7TF* same as above

TECHNICAL DATA

*For temperatures < -20°F (-29°C), fastener alloy must be B8C2, which is ASTM A193 Grade B8 class 2 (304, 304N, 305, 321, 347 stainlesssteel). Nut alloy must be E8.

33


34

DurcoPump PartsGroup I

ITEM DESCRIPTION

100 CASING

103 IMPELLER

104 IMPELLER GASKET

105 SHAFT

106 REAR COVER PLATE

107 REAR COVER GASKET

108 BEARING HOUSING ADAPTER N/A

109 BEARING HOUSING FOOT

109A SHIM

110 GLAND - PACKING OPT.

111 STUD - GLAND

111A HEXNUT - GLAND

112 PACKING SEAL CAGE HALVES OPT.

113 PACKING OPT.

114 DEFLECTOR INBOARD OPT.

115 STUD - CASING

115A HEXNUT - CASING

118 OIL SEAL INBOARD

119 BEARING HOUSING

120 BEARING INBOARD

121 BEARING OUTBOARD

122 OIL SLINGER OPT.

124 LOCKNUT - BEARING

125 LOCKWASHER - BEARING

129 OIL SEAL OUTBOARD

130 KEY - SHAFT/COUPLING

131 O-RING - ADAPTER N/A

133 TRICO OILER (Not Shown)

134 BEARING HOUSING DRAIN PLUG

135 BEARING HOUSING VENT PLUG

136 CAPSCREW - FOOT

139 CAPSCREW - BEARING HOUSING N/A

140 CAPSCREW - COVER/ADAPTER

153 MECHANICAL SEAL

177 HOOK SLEEVE OPT.

190 GLAND - MECHANICAL SEAL

190G GLAND GASKET

200 SIGHT GAGE - BEARING HOUSING

201 BEARING CARRIER

201A SET SCREW - BEARING CARRIER

201B O-RING - BEARING CARRIER

201C BEARING CARRIER RETAINER

201D CLAMP RING BEARING HOUSING OPT.

201E SOC-CAPSCREW CLAMP OPT.

Option for duplex angularcontact bearings


35

DurcoPump PartsGroup II and Group III

ITEM DESCRIPTION

100 CASING

103 IMPELLER

104 IMPELLER GASKET

105 SHAFT



108 BEARING HOUSING ADAPTER


109A SHIM


111 STUD - GLAND

111A HEXNUT - GLAND


113 PACKING OPT.


115 STUD - CASING



119 BEARING HOUSING

120 BEARING INBOARD







131 O-RING - ADAPTER




136 CAPSCREW - FOOT

139 CAPSCREW - BEARING HOUSING


153 MECHANICAL SEAL



190G GLAND GASKET


201 BEARING CARRIER




201D CLAMP RING BEARING HOUSING*201E SOC-CAPSCREW CLAMP*

Group II bearingretainer (201C) shown

TECHNICAL DATA

*OPTIONAL GROUP II

Group III double rowbearing retainer



36

Pump andBaseplateDimensions

Baseplate Mounting Dimensions

Max. HA *HD1▲ *HD2▲ **HGPump Motor Weight in (mm) HB in (mm) in (mm) HE HF in (mm) HHGroup Baseplate Frame lb (kg) Metal Poly. in (mm) Metal Poly. Metal Poly. in (mm) in (mm) Metal Poly. in (mm)

139 184T 111 (50) 15 (381) 13 (330) 39 (991) 9 (229) 87/8 (226) 103/4 (273) 105/8 (269) 41/2 (114) 361/2 (927) 33/4 (95) 35/8 (92)

148215T

163 (74) 18 (457) 16 (406) 48 (1219)91/2 (241) 93/8 (238)

111/8 (283) 11 (280) 6 (152) 451/2 (1156) 41/8 (105) 4 (102)GP I 256T 101/2 (267) 103/8 (264)1K

153286T

212 (96) 21 (533) 19 (483) 53 (1346)117/8 (302) 111/8 (283) 117/8 (302) 111/8 (283)

71/2 (191) 501/2 (1283) 43/4 (121) 4 (102)3/4 (19)

326TS 127/8 (327) 121/8 (308) 127/8 (327) 121/8 (308)245 184T 129 (59) 15 (381) 13 (330) 45 (1143) 12 (305) 117/8 (302) 133/4 (349) 135/8 (346) 41/2 (114) 421/2 (1080) 33/4 (95) 35/8 (92)252 215T 177 (80) 18 (457) 16 (406) 52 (1321) 123/8 (319) 121/4 (312) 141/8 (359) 14 (355) 6 (152) 491/2 (1257) 41/8 (105) 4 (102)258 286T 234 (106) 21 (533) 19 (483) 58 (1473) 13 (330) 121/4 (312) 143/4 (375) 14 (355) 551/2 (1410) 4 (102)

GP II264

326T328 (149) 22 (559) 22 (559) 64 (1626)

13 (330) 121/4 (312)143/4 (375) 14 (355)

71/2 (191)611/2 (1562)2K

365T 137/8 (352) 131/8 (334) 43/4 (121) 4 (102)268 405TS 409 (186) 68 (1727) 147/8 (378) 143/8 (365) 147/8 (378) 143/8 (365) 651/2 (1664) 41/4 (108)

1 (25)280 449TS 481 (218) 80 (2032) 157/8 (403) 153/8 (391) 157/8 (403) 153/8 (391) 771/2 (1969) 41/4 (108)

GP III368 286T 470 (213) 26 (660) 26 (660) 68 (1727) 91/2 (241) 651/2 (1664) 121/8 (308) 41/4 (108)

3K380 405T 601 (273) 80 (2032) 191/4 (489) 19 (483) 771/2 (1969) 91/8 (232) 41/4 (108)398 449T 746 (338) 98 (2489) 951/2 (2426) 81/8 (206) 41/4 (108)

Pump DimensionsSize USuction X Pump V

Pump ANSI Discharge Weight X O D E1 E2 CP F H Dia. Keyway Min. YGroup Desig. Max. Imp. Dia. lb (kg) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)

1K11/2x1LF-4 103 (47) 61/2 (165) 113/4 (298) 51/4 (133) 3 (76) 0 171/2 (445) 71/4 (184) 5/8 (16) 7/8 3/16 x 3/32 2 3/16 (56) 4 (102)AA 1K11/2x1-6 97 (44) (22.23) (4.76x2.38) 2 (51)AB 1K3x11/2-6 112 (51)

GP I A10 1K3x2-6 116 (53)1K 1K11/2x1LF-8 103 (47) 2 3/16 (56)

AA 1K11/2x1-8 103 (47) 2 (51)1K3x11/2-8 124 (56) 71/2 (190.5) 141/2 (368) 7 (177.8)

A60 2K3x2-8 200 (90) 91/2 (242) 173/4 (450) 81/4 (210) 47/8 (124) 35/8 (92) 231/2 (597) 121/2 (318) 5/8 (16) 11/8 1/4X1/8 2 5/8 (67) 4 (102)A70 2K4x3-8 227 (103) 11 (280) 191/4 (490) (28.58) (6.35X3.18)

2K2x1LF-10 210 (95) 81/2 (216) 163/4 (425) 23/4 (70)A05 2K2x1-10A 210 (95) 81/2 (216) 163/4 (425) 2 5/8 (67)A50 2K3x11/2-10A 220 (100) 81/2 (216) 163/4 (425)A60 2K3x2-10A 226 (103) 91/2 (242) 173/4 (450)A70 2K4x3-10 225 (101) 11 (280) 191/4 (490)

GP II A70 2K4x3-10H 249 (112) 121/2 (318) 221/2 (572) 10 (254)2K A80 2K6x4-10 290 (130) 131/2 (343) 231/2 (597) 11/2 3/8 x3/16

A80 2K6x4-10H 328 (149) 131/2 (343) 231/2 (597) (38.1) (9.5x4.76)

2K3x11/2LF-13 250 (112) 101/2 (266) 201/2 (520) (11/8) (1/4x1/8) 23/4 (70)A20 2K3x11/2-13 250 (112) 101/2 (266) 201/2 (520) (28.58) (6.35x3.18) 2 5/8 (67)A30 2K3x2-13 258 (116) 111/2 (292) 211/2 (546)A40 2K4x3-13 281 (126) 121/2 (318) 221/2 (572)A40 2K4x3-13HH 281 (126) 121/2 (318) 221/2 (572)A80 2K6x4-13A 324 (145) 131/2 (343) 231/2 (597)A90 3K8x6-14A 680 (306) 16 (406) 301/2 (775) 141/2 (368) 8 (203.2) 41/2 (114.3) 337/8 (860) 183/4 (476) 7/8 (22) 23/8 5/8x5/16 4 (102) 6 (152)A100 3K10x8-14 899 (408) 18 (457) 321/2 (826) (60.33) (15.88x7.94)

3K6x4-16 641 (291) 16 (406) 301/2 (775)

GP III A110 3K8x6-16A 832 (377) 18 (457) 321/2 (826)3K A120 3K10x8-16 917 (416) 19 (483) 331/2 (851)

A120 3K10x8-16H 992 (450) 19 (483) 331/2 (851)3K10x8-17 835 (379) 20 (508) 341/2(876)

*GPI – HD2 applies to 3x11/2-8 only. ▲ Includes spacer under pump, as necessary. ** “HG” Dimensions applied to the lower pad height. With some basesGPII – HD1 applies to 3x2-8, 4x3-8, 2x1-10A, 3x11/2-10A, 3x2-10A, and 4x3-10. this will occur at pump end and with others at motor end.

HD2 applies to 4x3-10H, 6x4-10, 6x4-10H, 3x11/2-13, 3x2-13, 4x3-13, 4x3-13HH, and 6x4-13A.GPIII – HD1 applies to all GP3 sizes.

Group I


37

AlloyMaterials

Flowserve’s foundriesare widely regarded

as among the best inthe world pouring alloys from commonaustenitic stainlesssteels to light reactivealloys such as titanium.All wet end Durco cast-ings carry a limitedlifetime guarantee.

Attesting to theworld class quality ofits castings, Flowservewas the first high alloyfoundry in the UnitedStates of America tohave earned approvalby Germany’s Tech-nischer ÜberwachungsVerein (TUV).

Durco Alloy MaterialsEquivalent

Durco Durco ACI Wrought ASTMDesignation Symbol Designation Designation Specifications*

Ductile Iron DCI None None A395Carbon Steel DS None Carbon Steel A216 Gr. WCBDurco CF-8M D4 CF-8M 316 A744, Gr. CF-8MDurcomet 100 CD4M CD-4MCu Ferralium® 255 A744, Gr. CD-4MCuDurimet 20 D20 CN-7M Alloy 20 A744, Gr. CN-7MDurcomet 5 DV None None NoneDurco CY-40 DINC CY-40 Inconel® 600 A494, Gr. CY-40Durco M-35 DM M-35-1 Monel® 400 A494, Gr. M-35-1Nickel DNI CZ-100 Nickel 200 A494, Gr. CZ-100Chlorimet 2 DC2 N-7M Hastelloy® B-2 A494, Gr. N-7MChlorimet 3 DC3 CW-6M Hastelloy® C-276 A494, Gr. CW-6MDuriron® D None None A518, Gr. 1Durichlor 51® D51 None None A518, Gr. 2Superchlor® SD77 None None NoneDurco DC-8 DC8 None None NoneTitanium Ti None Titanium B367, Gr. C-3Titanium-Pd Ti-Pd None Titanium-Pd B367, Gr. C-8AZirconium Zr None Zirconium B752, Gr. 702C*Durco alloys conform to the chemical and mechanical requirements of the latest edition of the ASTM specification.® Duriron, Durichlor 51 and Superchlor are registered trademarks of Flowserve Corporation.® Ferralium is a registered trademark of Langley Alloys® Hastelloy is a registered trademark of Haynes International, Inc.® Inconel and Monel are registered trademarks of International Nickel Co. Inc.

TECHNICAL DATA


38

Flowserve Suggeststhe Following

Specifications When Purchasing ANSI Pumps:Design: Shall be of ahorizontal, end suction,single stage, centerlinedischarge, “back pull-out”construction, meetingthe design criteria of theASME (ANSI) B73.1Mstandard.General: All wetted partsshall be permanentlymarked with the materialof construction. Castparts shall have a condi-tional lifetime castingguarantee. Stainless steelparts shall be cast to theASTM A744 standard.Casing: Shall have afully machined wet faceand shall be capable ofbeing foot or centerlinemounted. Flange finishesshall conform to ASME/ANSI B16.5 and shall beavailable in 150 or 300lb, flat or raised faces.Casing and rear coverplate shall have 1/8 in(3 mm) corrosionallowance.Impeller: Shall be thereverse vane design, andshall be open on the backand shrouded on thefront. The impeller clear-ance shall be set againstthe rear cover, not thecasing, allowing all set-tings to be done in themaintenance shop,without the casing. Theimpeller shall maintainlow seal chamber pres-sures, which shall bepublished on the pumpperformance curve, andshall be repeatable aftermaintenance. Theimpeller clearance shallbe set externally. Theimpeller-to-shaft connec-tion shall be a metal-to-metal fit. A silicon O-ringencapsulated in PTFEshall be used to protectthe impeller threads.Impeller shall bebalanced to ISO 1940Grade 6.3 criteria.Shaft: Shall be of solidconstruction to maximize

strength and rigidity. Theshaft shall consist of asteel power end frictionwelded to an alloy wetend. Shaft deflection shallnot exceed 0.002 in (0.05mm). The shaft key slotshall be designed with amachined radius “sledrunner” edge to providemaximum strength atthe coupling. Critical sur-faces shall be ground to±0.0002 in (0.005 mm),maximum roughness atthe seal chamber shallbe 16µin (0.40µm).Rear Cover: Shall besuitable for acceptingvarious seal designs fromall major seal manufac-turers. Cylindrical borestandard, cylindrical boreoversize, and taperedoptions shall be avail-able. Tapered optionsshall include eight evenlyspaced, tapered andsloped flow modifyingdevices integrally castinto the seal chamber.The flow modifiers shallfacilitate movement ofsolids, vapors, and heataway from the mechan-ical seal. The taperedseal chambers shall bedesigned to be self-flushing. For optimumperformance the sealand gland shall beselected to locate theseal faces directly in theflush path. Integrally castjackets shall be available.Bearings: Shall be large,heavy-duty, ball bearings.The inboard bearingshall be a single row,deep groove. The out-board shall be doublerow angular contact,deep groove. An optionalduplex angular contactoutboard bearing shallbe available for highthrust load applications.Both bearings shall belocated by a shoulder onthe shaft. The inboardbearing shall float in thebearing housing, whilethe outboard bearingshall be locked in placein the bearing carrier.The bearings shall ex-

DurcoMark IIIHow ToSpecifyProcessPumps

ceed B10 life of 17,500hours and allow less than0.001 in (0.025 mm)end play.Bearing Housing: Shallbe sealed to preventcontamination of thelubricant. The oil fill holeat the top of the housingshall be plugged. Novented constant leveloiler shall be used. Thehousing shall be sealedwith Inpro VBX bearingisolators. A magneticdrain plug shall be used.A large easy to read oneinch NPT sight glass shallbe used. The impellerclearance shall be set bythe micrometer adjust-ment method. Thismethod shall cause theshaft and impeller tomove axially. Indicatorsshall be cast into thebearing carrier whichrepresent 0.004 in(0.102 mm) of axialimpeller travel. Thisallows accurate impellerclearance to be estab-lished externally withoutthe use of measurementdevices. The bearingcarrier threads shall beprotected by two O-rings.

Coupling Guard: Shallconform to ASME B15.1and shall be of the“clamshell” design. Itshall extend from themotor to the bearinghousing, but shall notbe attached to either.The guard shall bebolted to the baseplate.Baseplate: Shall be of areinforced rigid designand shall conform tothe dimension require-ments of ASME B73.1M.


39

DurcoMark IIISealmatic

Dynamically sealing repeller eliminates

the need for conven-tional mechanical seals.Advanced static sealoptions are available.Dimensionally inter-changeable with allANSI pumps.

The SealmaticPrincipleThis pump does not leakwhile running becausethe Sealmatic designutilizes a repeller, adynamic sealing device,to evacuate liquid fromthe seal chamber. Thisis accomplished by crea-tion of a liquid interfaceseal in the repellerchamber that preventsleakage along the shaftduring operation. Forsealing while the pumpis stopped, three typesof sealing arrangementsare offered for maximumapplication flexibility:Checkmatic end face lipseal arrangement; dry-running end face sealdesigns; and the packedstuffing box design.

The Sealmatic designis also available withunitized self-priming andrecessed impeller pumps.

This family ofrepellers allows theSealmatic to be used inapplications having awide range of suctionpressures. Hydraulicperformance conformsto the Standard Mark IIIreverse vane impellercurves.

Applications• Tough sealing appli-

cations where a flushis impractical

• Evaporator service• Continuously running

pumps

Dynamicallysealing repeller

A choiceof sealingarrangements

Liquid/airinterface

Repeller

Stopped Running

Repellerchamber

MARK III SEALM

ATIC


40

SealmaticPerformanceCurves

FLOW – 2900 RPM (50 Hz)0 20 40 60 80 100 120 140 160 180 200 220 240 260 m3/h

0 200 400 600 800 1000 gpmm

240

200

160

120

80

40

0

ft900

800

700

600

500

400

300

200

100

0

TDH

– 3

500

RP

M (6

0 H

z)

ft

600

500

400

300

200

100

0

m

150

100

50

0

TDH

– 2

900

RP

M (5

0 H

z)

0 200 400 600 800 1000 1200 1400 gpm

0 40 80 120 160 200 240 280 m3/hFLOW – 3500 RPM (60 Hz)

3X1.5M-13

3X2M-13

4X3M-13

4X3M-10

3X2M-10A

3X1.5M-10A

2X1M-10A 6X4M-10

m

80

60

40

20

0

ft300

250

200

150

100

50

0

TDH

– 1

750

RP

M (6

0 H

z) SC

ALE

CH

AN

GE

FLOW – 1450 RPM (50 Hz)0 50 100 150 190 500 800 1100 1400 m3/h

0 200 400 600 800 2300 3800 5300 6800 gpmft

200

150

100

50

0

m60

50

40

30

20

10

0

TDH

– 1

450

RP

M (5

0 H

z)

0 200 400 600 800 1000 2800 4600 6400 8200 gpm

0 50 100 150 200 227 400 800 1200 1600 m3/hFLOW – 1750 RPM (60 Hz)

6X4M-13A

6X4M-16

8X6M-16A

8X6M-14A

10X8M-14

10X8M-16

10X8M-16H

4X3M-13

4X3M-10H

6X4M-10

6X4M-10H

4X3M-10

3X2M-133X1.5M-13

2X1M-10A

3X1.5M-10A

3X2M-10A


41

Checkmatic® Seal Design• Individual elastomeric lip seals run in light contact

against the radial faces of a standard mechanicalseal seat

• Lip seals turn with the shaft so the seat, not theshaft or sleeve, is the wear part

• Teflon1 (PFA) encapsulated silicon rubber O-ringshelp secure the lip seals to the shaft

• Lip seals available in Viton1, EPDM and Fluoraz2

Dry-Running End Face Seal Design• State-of-the-art technology utilizing various seals

such as the John Crane 28LD seal designed to runcompletely dry

• Positive sealing during shutdown• Easy installation• Also available in double cartridge design, typically

used with a nitrogen barrier

Packed Stuffing Box Design• Self-lubricating, flexible graphite packing• Simple, trouble-free design• Recommended use of DC8 shafts or DC8 sleeves

for abrasion and corrosion resistance

1 Registered trademark of E.I. duPont Company2 Registered trademark of Green, Tweed and Company

MARK III SEALM

ATICSealmaticShaft SealDesigns


42


Max. HA HD1 HD2 *HGPump Motor Weight in (mm) HB in (mm) in (mm) HE HF in (mm) HHGroup Baseplate Frame lb (kg) Metal Poly. in (mm) Metal Poly. Metal Poly. in (mm) in (mm) Metal Poly. in (mm)

245 184T 129 (59) 15 (381) 13 (330) 45 (1143) 12 (305) 117/8 (302) 133/4 (349) 135/8 (346) 41/2 (114) 421/2 (1080) 33/4 (95) 35/8 (92) 3/4 (19)252 215T 177 (80) 18 (457) 16 (406) 52 (1321) 123/8 (314) 121/4 (312) 141/8 (359) 14 (355) 6 (152) 491/2 (1257) 41/8 (105) 4 (102) 3/4 (19)258 286T 234 (106) 21 (533) 19 (483) 58 (1473) 13 (330) 121/4 (312) 143/4 (375) 14 (355) 551/2 (1410) 4 (102)

GP II264

326T328 (149) 22 (559) 22 (559) 64 (1626)

13 (330) 121/4 (312)143/4 (375) 14 (355)

71/2 (191)611/2 (1562)2K

365T 137/8 (352) 131/8 (333) 43/4 (121)4 (102)

268 405TS 409 (186) 68 (1727) 147/8 (378) 143/8 (365) 147/8 (378) 143/8 (365) 651/2 (1664) 41/4 (108)1 (25)

280 449TS 481 (218) 80 (2032) 157/8 (403) 153/8 (391) 157/8 (403) 153/8 (391) 771/2 (1969) 41/4 (108)

GP III368 286T 470 (213) 26 (660) 26 (660) 68 (1727) 91/2 (241) 651/2 (1664) 121/8 (308) 41/4 (108)

3K380 405T 601 (273) 80 (2032) 191/4 (489) 19 (483) 771/2 (1969) 91/8 (232) 41/4 (108)398 449T 746 (338) 98 (2489) 951/2 (2426) 81/8 (206) 41/4 (108)

Pump DimensionsUSuction Discharge Pump V

Size Size Weight X O D E1 E2 CP F H Dia. Keyway Min. YPump in (mm) in (mm) lb (kg) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)

2K2x1M-10A 2 (50) 1 (25) 210 (94) 81/2 (216) 163/4 (425) 81/4 (210) 47/8 (124) 35/8 (92) 231/2 (597) 121/2 (318) 5/8 (16) 11/8 1/4X1/8 2 5/8 (67) 4 (102)2K3x11/2M-10A 3 (76) 11/2 (38) 220 (100) 81/2 (216) 163/4 (425) (28.58) (6.35X3.18)

2K3x2M-10A 3 (76) 2 (50) 226 (103) 91/2 (242) 173/4 (450)2K4x3M-10 4 (102) 3 (76) 225 (101) 11 (280) 191/4 (490)

2K4x3M-10H 4 (102) 3 (76) 249 (112) 121/2 (318) 221/2 (572) 10 (254)2K6x4M-10 6 (152) 4 (102) 290 (130) 131/2 (343) 231/2 (597) 11/2 3/8 x3/16

2K6x4M-10H 6 (152) 4 (102) 328 (149) 131/2 (343) 231/2 (597) (38.1) (9.5x4.76)

2K3x11/2M-13 3 (76) 11/2 (38) 250 (112) 101/2 (266) 201/2 (520) (11/8) (1/4x1/8)

2K3x2M-13 3 (76) 2 (50) 258 (116) 111/2 (292) 211/2 (546) (28.58) (6.35x3.18)

2K4x3M-13 4 (102) 3 (76) 281 (126) 121/2 (318) 221/2 (572)2K6x4M-13A 6 (152) 4 (102) 324 (145) 131/2 (343) 231/2 (597)3K8x6M-14A 8 (203) 6 (152) 680 (306) 16 (406) 301/2 (775) 141/2 (368) 8 (203.2) 41/2 (114.3) 337/8 (860) 183/4 (476) 7/8 (22) 23/8 5/8x5/16 4 (102) 6 (152)3K10x8M-14 10 (254) 8 (203) 899 (408) 18 (457) 321/2 (826) (60.33) (15.88x7.94)

3K6x4M-16 6 (152) 4 (102) 641 (291) 16 (406) 301/2 (775)3K8x6M-16A 8 (203) 6 (152) 832 (377) 18 (457) 321/2 (826)3K10x8M-16 10 (254) 8 (203) 917 (416) 19 (483) 331/2 (851)

3K10x8M-16H 10 (254) 8 (203) 992 (450) 19 (483) 331/2 (851)

HD1 for the following pumps: 2x1M-10A, 3x11/2M-10A, 3x2M-10A, 4x3M-10 * “HG” Dimensions applied to the upper pad height. With some basesHD2 for the following pumps: 4x3M-10H, 6x4M-10, 6x4M-10H, 3x11/2M-13, 3x2M-13, 4x3M-13, 6x4M-13A this will occur at pump end and with others at motor end.

SealmaticDimensions


43

SealmaticPartsGroup II and Group III

ITEM DESCRIPTION

100 CASING

103 IMPELLER

104 IMPELLER GASKET

105 SHAFT





109A SHIM


111 STUD - GLAND

111A HEXNUT - GLAND


113 PACKING OPT.


115 STUD - CASING



119 BEARING HOUSING

120 BEARING INBOARD











136 CAPSCREW - FOOT



153 MECHANICAL SEAL


180 COVER - REPELLER

181 REPELLER


190G GLAND GASKET


201 BEARING CARRIER




201D CLAMP RING BEARING HOUSING*201E SOC-CAPSCREW CLAMP*330 MECHANICAL SEAL

Group III double rowbearing retainer

Group II bearing retainer (201C) shown


MARK III SEALM

ATIC

*OPTIONAL GROUP II


44

Costs less to buy,install and service

than submersiblepumps. Utilizes thesame power end, shaft,seal chamber and im-peller as the StandardANSI Pump. Only thecasing is special.

Priming Cycle Cutaway Illustrations1. Sump Filling, PumpStoppedThe casing is shown with theinitial prime liquid, which per-manently stays in the casing.This serves as the primingliquid necessary to entrain theair contained in the suction line.2. Pump Start-UpAs the impeller spins, thepriming liquid entrains air fromthe suction pipe and is pumpedinto the air separator/priming

Applications• Sump Service• Tank Car Unloading• Duplex Pumping Lift

Stations• Flyash Pond Transfer• Waste Acid Transfer• Waste Treatment

Lagoon Service

tank portion of the casing. Inthis chamber the air separatesfrom the priming liquid andvents out the discharge whilethe priming liquid flowsthrough the bypass slot in thebottom of the casing and backinto the impeller eye. As thepriming liquid circulates, it re-entrains more air, creating apartial vacuum in the suctionline. The sump liquid is thenpushed upward by atmosphericpressure.3. Priming AchievementAfter the priming cycle hasevacuated all of the air from thesuction pipe, the sump liquidfloods the volute, air separatorand priming chamber, andpumping out of the discharge

pipe begins. The Unitized Self-Priming is fully primed and nowoperates exactly as a standardflooded-suction Durco pump.4. Sump Empty, PumpStoppedWhen the pump stops, theliquid in the discharge pipingflows back through the pump,leaving the priming chamberfilled with sufficient liquid forthe next priming cycle. Exceptfor the first fillup of the prim-ing chamber and an occasional“topping off” in dry climates,the Durco Unitized Self-Primingis automatic and trouble-free.

UnitizedSelf-Priming

➀

➁

➂

➃


45

UnitizedSelf-PrimingPerformanceCurves

3 X 2US-10

3 X 2US-10

2 X 1.5US-10A

3 X 2US-10

2 X 1.5US-10A

6 X 4US-13A4 X 3US-13

3 X 2US-13

4 X 3US-10H

3 X 2US-10

2 X 1.5US-10A3 X 2US-13

4 X 3US-136 X 4US-13A

4 X 2US-10H

DURCO MARK IIIUNITIZED SELF-PRIMING3500 RPM PUMPS

320 400 480 560240160800

40

80

120

160

200

240

280

320

360

400

440

0

0 20 40 60 80 100 120 140 160

0

20

40

60

80

100

120

T.D.HIN

FEET

T.D.H INMETERS

CAPACITY CUBIC METERS PER HOUR

CAPACITY U S GALLONS PER MINUTE


400 600 800 10003002001000

20

40

60

80

100

120

140

160

180

200

0

0 20 40 60 80 100 140 180 220

0

10

20

30

40

50

60

T.D.HIN

FEET

T.D.H INMETERS

260 300

1200




40 50 60 703020100

20

40

60

80

100

0

0 100 200 300 400

0

50

100

150

200

250

300

T.D.HIN

FEET

350

80 90 100CAPACITY CUBIC METERS PER HOUR



80 100 120 1406040200

10

20

30

40

50

0

0 100 200 300 400 500 600 800 1200

0

20

40

60

80

100

140

160

120

200 250 300CAPACITY CUBIC METERS PER HOUR



400 500 600 7003002001000

10

20

30

40

50

60

70

80

90

100

0

0 20 40 60 80 100 120 140 160

0

5

10

15

20

25

30

T.D.HIN

FEET

T.D.H INMETERS

180 200

800



3 X 2US-13

3 X 2US-10

1.5 X 1US-6/60

4 X 3US-10H

4 X 3US-13

6 X 4US-13A

SCALECHANGE

2 X 1.5US-10A

1.5 X 1.5US-82

2X1.5US-10A

SCALECHANGE

1.5 X 1US-6

T.D.HIN

FEET

T.D.H INMETERS

T.D.H INMETERS

1.5 X 1US-6

1.5 X 1.5US-82

1.5X1.5US-82

1.5 X 1.5US-82

MARK III SELF-PRIM

ING

60 Cycle

50 Cycle


16801150

x 18 sec = 26 seconds,

or 8 seconds longer priming time.

When a self-primingpump primes, a signifi-cant volume of air isevacuated from the suc-tion line. A self-primingpump will not workunless there is a way forthe air to be vented.Flowserve suggests that avent line be run from thedischarge as shown onthe diagram below.

46

Individual pump curvesfound in Bulletin

P-12-102 contain graphsof both hydraulic per-formance and primingtime. Once a pump hasbeen selected based onspeed, efficiency, flowand head, priming timesmay be determined fromthese graphs. As pumpperformance varies withRPM and impeller diam-eter, priming times alsochange. Factors such asstatic suction lift distance,specific gravity and suc-tion pipe size also havea direct bearing uponpriming times.

Static Suction Lift – Thehigher the lift, the greaterthe amount of air in thesuction pipe to evacuateand the longer thepriming time. Exampleillustrated: A 3x2US-13pump with a 13 in (330mm) impeller liftingwater 10 ft (3 m) wouldtake 18 seconds (GraphA). A lift of 15 ft (4.6 m)would take 30 seconds.

Specific Gravity – Asspecific gravity increases,priming times also in-crease. For example: Apump previously lifting10 ft (3 m) of water (1.0sp.Gr.) is now pumpinga liquid with a specificgravity of 1.4. The 10 ft(3 m) actual lift x 1.4sp.gr. becomes an effec-tive lift of 14 ft (4.3 m),for a priming time of 26seconds. To be conserva-tive for specific gravitieslower than 1.0, use 1.0in the equation. Thepractical limit of a self-priming pump is 20 ft(6.1 m), divide thisamount by specific grav-ity to determine theactual lift limit. Forexample: 20 ft (6.1 m) ÷1.4 = 14.3 ft (4.4 m)maximum possible lift.

Suction Pipe Size – Theself-priming pump primesby evacuating the air inthe suction piping. Thepriming time curves arebased on the volume ofair contained in a pipe

Graph CS = Minimum Submergence, m

0.6 1.2 1.8 2.4 3.0 3.6 4.2 4.8

16 293

12 220

8 146

4 73

0 2 4 6 8 10 12 14 16S = Minimum Submergence, ft

length equal to theactual static lift shownplus that contained in3 ft (1 m) of horizontalrun into the pump. Thepump example liftingliquid 10 ft (3 m) andhorizontally 3 ft (1 m)contains 1150 cu inches(0.0188 m3) of air in thesuction pipe (Graph B).Extending the pipe’shorizontal run to 9 ft(2.7 m) gives an addi-tional 530 cu in (0.0090m3) of air to evacuatebefore achieving prime.

UnitizedSelf-PrimingTechnicalData

Suct

ion

Pipe

Vel

ocity

, f/s

Suct

ion

Pipe

Vel

ocity

, m/m

in

Graph A Graph B


47

UnitizedSelf-PrimingDimensions

Pump DimensionsUPump V

Weight X O CP D D5 D6 D9 F H Dia. Keyway Min.Pump lb (kg) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)

1J11/2x1US-6 120 (54) 43/4 (121) 121/2 (318) 201/8 (511) 51/4 (133) 4 9/16 (115) 4 9/16 (115) 4 (102) 65/8 (168) 21/2 (64) 7/8 (22) 3/16x3/32 2 3/16 (56)1K11/2x11/2US-8 154 (70) 37/8 (98) 147/8 (378) 201/2 (521) 7 (178) 51/2 (140) 51/2 (140) 5 (127) 7 (178) 4 (102) 7/8 (22) (4.8x2.4)

2K2x11/2US-10A 320 (145) 6 (152) 181/4 (464)289/16 (725) 81/4 (210)

67/8 (175) 67/8 (175)51/4 (133) 9 (229) 4 (102) 11/8 (29) 1/4x1/8 (6x3)

2K3x2US-10 340 (154) 61/2 (165) 183/4 (476) 71/4 (185) 71/4 (185)2K3x2US-13 420 (191) 8 (203) 22 (559) 289/16 (725)

87/8 (225) 87/8 (225)51/4 (133) 9 (229) 4 (102) 23/4 (70)

2K4x3US-10H 430 (195) 71/2 (191) 221/2 (572)309/16 (776)

10 (254)53/4 (146) 11 (279) 5 (127)

11/8 (29) 1/4x1/8 (6x3)2K4x3US-13 520 (236) 81/2 (216) 231/2 (597) 9 9/16 (243) 9 9/16 (243)

2K6x4US-13A 630 (286) 10 (254) 26 (660) 32 (813) 11 (279) 109/16 (268) 109/16 (268) 6 (152) 127/16 (316) 5 (127) 11/8 (29) 1/4x1/8 (6x3)


Max. HA HD1▲ HD2▲ HD3 HGPump Base- Motor Weight in (mm) HB in (mm) in (mm) in (mm) HE HF in (mm) HHGroup plate Frame lb (kg) Metal Poly. in (mm) Metal Poly. Metal Poly. Metal Poly. in (mm) in (mm) Metal Poly. in (mm)

139 184T 111 (50) 15 (381) 13 (330) 39 (991) 9 (229) 87/8 (226) 103/4 (273) 105/8 (269) 41/2 (114) 361/2 (927) 33/4 (95) 35/8 (92)

148215T

163 (74) 18 (457) 16 (406) 48 (1219)91/2 (241) 95/8 (245)

111/8 (283) 111/4 (286) 6 (152) 451/2 (1156) 41/8 (105) 41/4 (108)GP I 256T 101/2 (267) 105/8 (270)1K

153286T

212 (96) 21 (533) 19 (483) 53 (1346)117/8 (302) 113/8 (289) 117/8 (302) 113/8 (289)

71/2 (191) 501/2 (1283) 43/4 (121) 41/4 (108)3/4 (19)

326TS 127/8 (327) 123/8 (314) 127/8 (327) 123/8 (314)245 184T 129 (59) 15 (381) 13 (330) 45 (1143) 12 (305) 117/8 (302) 133/4 (349) 135/8 (346) 143/4 (375) 145/8 (372) 41/2 (114) 421/2 (1080) 33/4 (95) 35/8 (92)252 215T 177 (80) 18 (457) 16 (406) 52 (1321) 123/8 (319) 117/8 (302) 141/8 (359) 135/8 (346) 151/8 (384) 145/8 (372) 6 (152) 491/2 (1257) 41/8 (105) 35/8 (92)258 286T 234 (106) 21 (533) 19 (483) 58 (1473) 13 (330) 121/4 (312) 143/4 (375) 14 (355) 153/4 (400) 15 (381) 551/2 (1410)

GP II264

326T328 (149) 22 (559) 22 (559) 64 (1626)

13 (330) 121/2 (318)143/4 (375) 141/4 (362) 153/4 (400) 15 (381)

71/2 (191)611/2 (1562)2K

365T 137/8 (352) 133/8 (340) 43/4 (121) 41/4 (108) 1 (25)268 405TS 409 (186)

26 (660) 26 (660)68 (1727) 147/8 (378) 143/8 (365) 147/8 (378) 143/8 (365) 153/4 (400) 15 (381)

91/2 (241)651/2 (1664)

280 449TS 481 (218) 80 (2032) 157/8 (403) 153/8 (391) 157/8 (403) 153/8 (391) 157/8 (403) 151/8 (384) 771/2 (1969)

GPI – HD1 applies to 1J11/2x1US-6 ▲ Includes spacer under pump, as necessary.HD2 applies to 1K11/2x11/2US-82

GPII – HD1 applies to 2L2x11/2US-10A and 2K3x2US-10HD2 applies to 2K3x2US-13, 2K4x3US-13 and 2K4x3US-10HHD3 applies to 6x4US-13A

MARK III SELF-PRIM

ING


48

ITEM DESCRIPTION

100 CASING

103 IMPELLER

104 IMPELLER GASKET

105 SHAFT



108 BEARING HOUSING ADAPTER*109 BEARING HOUSING FOOT

109A SHIM


111 STUD - GLAND

111A HEXNUT - GLAND


113 PACKING OPT.


115 STUD - CASING



119 BEARING HOUSING

120 BEARING INBOARD







131 O-RING - ADAPTER*133 TRICO OILER (Not Shown)



136 CAPSCREW - FOOT

139 CAPSCREW - BEARING HOUSING*140 CAPSCREW - COVER/ADAPTER

153 MECHANICAL SEAL



190G GLAND GASKET


201 BEARING CARRIER







Group II shown. Seepage 32 for Group Ipumping unit details.

* GROUP II ONLY.

UnitizedSelf-PrimingPartsGroup I and Group II


49

DurcoPre-EngineeredPrimingTanks

MARK III SELF-PRIM

ING

Combine DurcoPriming Tanks with

most standard pumpsto create simple andreliable self-primingsystems.

Benefits:• Allows the pump to

sit high and dry. Easyaccess for mainte-nance. No need fortroublesome verticalsump pumps orelaborate hoisting equipment.

• Zero priming timereduces stress onseals and bearingsthat occurs duringpriming cycle withself-priming pumpdesigns.

• Air bleed line frompump dischargecommon with self-priming pump is notrequired.

Applications:• Sump pump service• Tank car unloading• Flows to 6,000 gpm

(1,364 m3/h) Special designs to25,000 gpm (5,682 m3/h)

Common Pump Types:• Standard ANSI/ISO• Sealless Pumps• Recessed Impeller/

vortex type pumpsSolids to 4 in (100 mm)

• Low flow / high head• Non-metallic

Materials of Construction• Carbon Steel• 316SS• FRP• Others on request

Also available: the original unitized self-priming pump

Capacities to 1,400 gpm (318 m3/h), Heads to 170 ft(52 m)


50

Selection Criteria1. Select priming tank

with maximum designcapacity equal to orgreater than themaximum processflow rate from Table 3.

2. Determine NPSHa forthe pump, includinghead loss thru primingtank from Table 1.

3. Confirm from Table 3that suction lift requireddoes not exceed tankcapabilities.

4. Select pump to assureNPSHr of pump is lessthan NPSHa of system.Good Pump Practicerecommends the dif-ference be 5 ft (2 m)or 20%, whichever isgreater.

Design/InstallationCriteria1. Provide suction pipe

prior to the primingtank the same size astank inlet and outlet.Pipe length from thetank to the liquid levelshould be limited to20 ft (6 m). This pro-vides the maximumvolume of air the tankwill prime. A change inpipe dimensions mustnot result in greater airvolume to be primed.NPSH and submergencefactors must also beconsidered.

2. Provide 10 diametersof straight suction pipeto pump inlet wherepossible. Suction pipebetween the primingtank and pump maybe reduced (eccentricreducer) to matchpump suction size.

3. Install a low levelswitch in the sump toensure that the mini-mum submergence ismaintained. The mini-mum submergencedepends on the fluidvelocity at the pipeinlet. That fluid veloci-ty varies with the inlet

2 4 6 8 10 12 14 16 ft.6 1.2 1.8 2.4 3.0 3.7 4.3 4.9 m

S = Min. Submergence

Ft/s m/s2

16 4.9

12 3.7

8 2.4

4 1.2

Sucti

on P

ipe Ve

locity

Table 2: SubmergenceTable 2: Submergence

DurcoPre-EngineeredPrimingTanks

Table 1: Priming Tank Head Loss CurvesFlow – m3/h

0 6 11 34 57 85 114 170 227 341 454 681 908 1136 1363

0 25 50 150 250 375 500 750 1000 1500 2000 3000 4000 5000 6000Flow – gpm

876543210

2.42.11.81.51.20.90.60.30

Head

Loss

– ft

Head Loss – m

Denotes scale change

➀

➆➅➄

➃➂➁

Curve 1 GB 50/GBM11Curve 2 GB 250/GBM57Curve 3 GB 500/GBM114Curve 4 GB1000/GBM227

Curve 5 GB 2000/GBM454Curve 6 GB 4000/GBM908Curve 7 GB 6000/GBM1363

Table 1: Priming Tank Head Loss Curves

diameter. If the liquidlevel in the sumpallows air into thesuction pipe, the tankwill lose prime andthe pump will emptythe tank of liquid. SeeSubmergence Table 2.

4. Provide a check valveon discharge pipe toavoid siphon problems.

5. Seal all pipe connec-tions and the pump toprevent air ingress andloss of prime.

6. Anchor the primingtank to the foundationthrough holes in padson bottom of tank legs.See certified dimen-sion prints for size and locations.

7. Provide proper pipingsupport.

Suct

ion

Pipe

Inle

t Vel

ocity

Hea

d Lo

ss –

m

Hea

d Lo

ss –

ft

Flow – gpm

Flow – m3/h

Denotes scale change


51

MARK III SELF-PRIM

ING

Check Valve(Required)

DischargeIsolationValve

SuctionIsolationValve

1/2 in (15 mm)NPT TankOverfill Port

1 in (25 mm) NPTTank Fill Port

AnchorPads

▲

▲

▲

▼

▼

▼

▼

▲

▼

▼

12 in (300 mm) minimum liquid levelto pipe inlet

(see submergence)

▲

▼

AMaximum

20 ft (6 m) maximum piping length(see design/installation notes 1 and 2)

F min3F

▼

▼

▼

▼

F

E

▼

▼ B

C

D

Low levelswitch recommended to avoidair enteringthe pipe inlet,causing loss of prime

High levelswitch

Table 3: Pre-Engineered Priming Tank Dimensional DataA B C D E F

Tank Model* Maximum Flow Maximum Lift** Tank Diameter Tank Height Flange Height Inlet/Outlet Width Piping Diametergpm (m3/h) ft (m) in (mm) in (mm) in (mm) in (mm) in (mm)

GB50 (GBM11) 50 (11) 17 (5.2) 24 (650) 43 (1100) 14 (360) 30 (770) 11/ 2 (40)GB250 (GBM57) 250 (57) 17 (5.2) 30 (800) 54 (1360) 18 (460) 38 (970) 3 (80)GB500 (GBM114) 500 (114) 17 (5.2) 36 (950) 61 (1540) 19 (490) 44 (1120) 4 (100)GB1000 (GBM227) 1000 (227) 17 (5.2) 42 (1100) 69 (1740) 23 (590) 50 (1270) 6 (150)GB2000 (GBM454) 2000 (454) 17 (5.2) 48 (1300) 87 (2200) 30 (770) 60 (1530) 8 (200)GB4000 (GBM908) 4000 (908) 13 (4.0) 54 (1400) 88 (2240) 38 (970) 66 (1680) 10 (250)GB6000 (GBM1363) 6000 (1363) 13 (4.0) 60 (1600) 102 (2600) 47 (1200) 76 (1930) 12 (300)

* GB - ANSI Flanges -U.S. customaryGBM - DIN Flanges -S.I. (metric)

All dimensions are approximateand for illustration purposes only.For exact dimensions request certified dimensional prints.

** Divide by specific gravity foreach application. Engineereddesigns can provide greaterlift capabilities.

Operating Criteria1. Ensure maximum test

pressure limited to14.7 psig (100 kPa).Priming tanks operatein vacuum conditionsand are designed as“containment vessels”.

2. Remove the tank fillplug to vent tank whileinitially filling the sump.This avoids an air pock-et in submerged pipe.

3. Fill priming tank withpump discharge isolationvalve closed and pumpsuction isolation valveopen. A tank fill port andan overfill port are pro-vided to assure properfilling and operation.

4. Apply suitable sealant tofill port and overfill portplugs and replace priorto operating.

NOTICE: Internal chamber designis proprietary technology and critical to successful operation


52

Trouble-free pump-ing of solid, stringy

or fibrous slurries.Delivers efficient opera-tion and low NPSHr.

Vortex Pumping ActionIs Your Best Choice For:• Erosive/Corrosive

Slurries• Degradation Sensitive

Crystals• Shear Sensitive

Liquids• Stringy Solids• Waste Water

Impeller DynamicsThe vortexcreated by thespinning im-peller does thepumping withless than 20%of the mediaactually contact-ing the impeller.Abrasive wear is

minimized and solidsintegrity is main-

tained. Precision-castimpellers ensure peakenergy efficiency andlow NPSH requirements.Rear pump-out vanesare used as necessary toensure low, positive sealchamber pressure and

to expel solids from theseal area, thus maximiz-ing mechanical sealand packing life. Theimpeller is set to therear cover plate – justlike the standard reversevane impeller.

Casing DynamicsThe cylindrical volutedesign combined withthe impeller spinning“out of the flow” mini-mize radial loads on theimpeller. The result islonger seal life as wellas maximized radialbearing life. The circularflow path and tangentialdischarge also con-tribute to maximumpump life.

Applications• Abrasive Waste Water• Biological Sludge• Clarifier Underflow• 5% Coke Slurry• Diatomaceous Earth

Slurry• Floculant Sludge• Latex• Lime Mud Slurry• Organic Slurry• Polymer Slurry• Resin Slurry• Rubber Crumb Slurry• Sodium Hydroxide• Catalyst Slurry

RecessedImpeller


53

RecessedImpellerPerformanceCurves

60 Cycle

50 Cycle

MARK III RECESSED IM

PELLER

0 10

2 x 2R-10(CLAW)

2 x 2R-6

20 30 40 50 60 70 80

0 50 100 150 200 250 300 350

440

T.D.HIN

FEET

400

360

320

280

240

200

160

120

80

40

0

T.D.H INMETERS

120

140

100

80

60

40

20

0



DURCO MARK IIICOMPOSITE GROUP I & IIRECESSED IMPELLER PUMP 3500 R.P.M.

0 40020 40 60 80 100 200 300

0 80 160 240 320 400 800 1200 1600

T.D.HIN

FEET

100

4 X 3R-13

SCALECHANGE

2 X 2R-10 3 X 3R-10

6 X 4R-13

2X2R-6

80

60

40

20

0

T.D.H INMETERS

30

25

20

15

10

5

0




0 50 100 150 200 250 300 350

0 10 20 30 40 50 60 70 80

80

2 X 2R-10(CLAW)

2 X 2R-6

70

60

50

40

30

20

10

0

240

280

200

160

120

80

40

0




0 80 160 240 320 400 480 560 640

0 20 40 60 80 100 120 140 300200 400 500

T.D.HIN

FEET

48

4 X3R-13

3 X 3R-102 X 2R-10

6 X 4R-13

2X2R-6

40

32

24

16

8

0

T.D.H INMETERS

200

160

120

80

40

0




0 20 40 60 80 100 200 300 400

0 100 200 300 400 800 1200 1600 2000

T.D.HIN

FEET

200

4 X 3R-13

6 X 4R-13

3 X 3R-102 X 2R-10

160

120

80

40

0

T.D.H INMETERS

60

50

40

30

20

10

0




0 40 80 120 160 200 240 280

0 160 320 480 640 800 960 1120 1280

T.D.HIN

FEET

4 X 3R-13

6 X 4R-13

50

40

30

20

10

0

T.D.H INMETERS

12

14

10

8

6

4

2

0



DURCO MARK IIICOMPOSITE GROUP IIRECESSED IMPELLER PUMP 860 R.P.M.

0 200 400 600 800 1000 1200 1400 1600

0 40 80 120 160 200 240 280 320 360

4 X 3R-13

6 X 4R-13

24

20

16

12

8

4

0

100

80

60

40

20

0



DURCO MARK IIICOMPOSITE GROUP IIRECESSED IMPELLER PUMP 960 R.P.M.

500

16

1800

1000 1500 2000

SCALECHANGE

SCALECHANGE

2X2R-6

T.D.HIN

FEET T.D.H INMETERS

T.D.HIN

FEET

T.D.H INMETERS


54


Max. HA HD1** HD2** HGPump Motor Weight in (mm) HB in (mm) in (mm) HE HF in (mm) HHGroup Baseplate Frame lb (kg) Metal Poly. in (mm) Metal Poly. Metal Poly. in (mm) in (mm) Metal Poly. in (mm)

139 184T 111 (50) 15 (381) 13 (330) 39 (991) 9 (229) 87/8 (226) 41/2 (114) 361/2 (927) 33/4 (95) 35/8 (92)

148215T

163 (74) 18 (457) 16 (406) 48 (1219)91/2 (241) 95/8 (245)

6 (152) 451/2 (1156) 41/8 (105) 4 (102)GP I 256T 101/2 (267) 105/8 (270)1J

153286T

212 (96) 21 (533) 19 (483) 53 (1346)117/8 (302) 113/8 (289)

71/2 (191) 501/2 (1283) 43/4 (121) 4 (102)3/4 (19)

326TS 127/8 (327) 123/8 (314)245 184T 129 (59) 15 (381) 13 (330) 45 (1143) 12 (305) 117/8 (302) 133/4 (349) 135/8 (346) 41/2 (114) 421/2 (1080) 33/4 (95) 35/8 (92)252 215T 177 (80) 18 (457) 16 (406) 52 (1321) 123/8 (319) 121/8 (308) 141/8 (359) 14 (355) 6 (152) 491/2 (1257) 41/8 (105) 4 (102)258 286T 234 (106) 21 (533) 19 (483) 58 (1473) 13 (330) 121/4 (312) 143/4 (375) 14 (355) 551/2 (1410)

GP II264

326T328 (149) 22 (559) 22 (559) 64 (1626)

13 (330) 121/4 (312)143/4 (375) 14 (355)

71/2 (191)611/2 (1562)

4 (102)2K365T 137/8 (352) 131/8 (334) 43/4 (121)

268 405TS 409 (186) 26 (660) 26 (660) 68 (1727) 147/8 (378) 143/8 (365) 147/8 (378) 143/8 (365) 91/2 (241) 651/2 (1664) 41/4 (108)1 (25)

280 449TS 481 (218) 80 (2032) 157/8 (403) 153/8 (391) 157/8 (403) 153/8 (391) 771/2 (1969)

Pump DimensionsSuction Discharge Pump

Size Size Weight X O C D D5 D6 D9 F CPPump in (mm) in (mm) lb (kg) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm) in (mm)

1J2x2R-6 2 (50) 2 (50) 100 (45) 61/2 (165) 113/4 (298) 23/4 (70) 51/4 (133) 43/8 (109) 43/8 (109) 31/4 (70) 5 9/16 (141) 191/16 (484)2K2x2R-10 2 (50) 2 (50) 260 (118) 81/2 (216) 163/4 (425) 51/4 (133) 81/4 (210) 613/16 (173) 613/16 (173) 31/2 (89) 53/4 (146) 251/4 (641)2K3x3R-10 3 (80) 3 (80) 300 (136) 9 (229) 17 1/4 (438) 51/8 (130) 81/4 (210) 73/16 (182) 73/16 (182) 41/4 (108) 71/2 (190) 27 (680)2K4x3R-13 4 (100) 3 (80) 360 (163) 101/2 (267) 201/2 (521) 65/8 (168) 10 (254) 811/16 (221) 811/16 (221) 41/8 (105) 71/8 (181) 265/8 (676)2K6x4R-13 6 (150) 4 (100) 390 (177) 111/2 (292) 211/2 (546) 65/8 (168) 10 (254) 93/16 (233) 93/16 (233) 43/4 (121) 83/8 (213) 277/8 (708)

HD1 for the following pumps: 2x2R-10, 3X3R-10 *Shaft Extension 11/2 (38) Dia. 3/8 x 3/16 (10 x 5) **Includes spacer under pump, as necessary.HD2 for the following pumps: 4x3R-13, 6X4R-13 Keyway on 4 x 3R-13 and 6 x 4R-13 Pumps

D dimension is from shaft center line to bottom of casing feet. See HD and HG dimensions to determine shims under pump if required.

RecessedImpeller Dimensions


55

RecessedImpellerPartsGroup II

ITEM DESCRIPTION

100 CASING

103 IMPELLER

104 IMPELLER GASKET

105 SHAFT





109A SHIM


111 STUD - GLAND

111A HEXNUT - GLAND


113 PACKING OPT.

113L LIP SEAL


115 STUD - CASING



119 BEARING HOUSING

120 BEARING INBOARD











136 CAPSCREW - FOOT



153 MECHANICAL SEAL



190G GLAND GASKET


201 BEARING CARRIER







Abrasive packing arrangement

MARK III RECESSED IM

PELLER


56

The KW941 PumpPower Monitor

monitors and displaysactual power to thepump offering simul-taneous protection fromunderload and overloadoperating conditions.

The KW941 helps toeliminate costly down-time and expensivepump repairs caused by:• Dry running• Pump overloads• Cavitation• Blocked lines• Closed suction or

discharge valves• Excessive wear or

rubbing

By sensing power andnot just amperes, linearmeasurements are givenwhich help to eliminateunwanted nuisance trips.

Broad application range• Works on all pumps

having steady (non-pulsating) loads: cen-trifugal; gear; turbine;ANSI; API; paper stock;sealed; mag drive; canmotor; self-priming

Easy installation• Simple wiring

procedure• Easily installed on

existing pumpinstallations

Easy setup &calibration• Settings controlled

from front panel pushbuttons; no internaladjustments, dipswitches or potentio-meters

• Large digital displayfor easy viewing andaccurate settings

• One step calibrationcan be performedwithout operatingpump. No need to runpump at off-operatingconditions to calibratepower monitor

• Settings can be viewedor adjusted duringnormal pumpoperation

The KW941 PowerMonitor is easy to installon new or existing pumpinstallations. All connec-tions and controls arelocated at motor starterelectrical enclosure asshown above. Costly in-strumentation wiring tothe pump is eliminated.

Premium features forreliable protection• Push buttons display

horsepower orkilowatts; automaticconversion whenswitching displays

• Adjustable low powerand high power setpoints protect pumpfrom underload andoverload operation.Alarms can be trippedor pumps shut downbefore damage occurs

• Adjustable tripdelay timersfilter out nuisancetrips caused bytemporary powerfluctuations

• Adjustable start up delaytimer is particularlyuseful in unloadingapplications

• Optional 4 to 20 milli-amp analog output.Facilitates remote dis-plays, operator interfaceand output to PLC or DCS

• Two form C relay out-puts for low and highpower trips. Outputs canbe used to shut downpump or trip alarms

• Automatic, manual andremote reset options forversatile operation

Durco KW941 Pump PowerMonitor ™


57

Specifications

DISPLAY/CONTROL MODULE:

Full Scale Range: Adjustable 1 to 150 hp (0.7 to 112 kW). To 600 hp (447 kW) usingcurrent transformer (not included).

Display: 3 digit, 0.6 in (15 mm) high, 7 segment, red LED digital display. Red LEDindicators for display mode, trip delays and trip points.

Enclosure: Polycarbonate, NEMA 4X / IP66 with see-through cover. Four #8 (4 mm)mounting holes. Enclosure can be drilled, sawed or punched on bottom or back forwiring access.

Power: 110 VAC (220/240 VAC optional), 50/60 Hz @ 0.125 amperes. Power isobtained from a control voltage transformer (not supplied) connected between twophases of the three-phase motor power source.

Operating Temperature: -40˚ to 158˚F (-44˚ to 70˚C).

Adjustable Trip Set Points:High Power: When power exceeds the trip point setting, the trip delay is activated.

When the trip delay has timed out, an alarm contact relay will trip.Low Power: When power falls below the trip point setting, the trip delay is

activated. When the trip delay has timed out, an alarm contact relaywill trip.

Adjustable Trip Delay Timers:Delay timers eliminate trips during motor starting and false trips due to temporarypower fluctuations. Individual timers are adjustable from 0-to-999 seconds:

Start-up DelayLower Power Trip DelayHigh Power Trip Delay

Alarm Relay Contacts: Form C relays for low power and high power trip points.Ratings: 5 amps @ 125 VAC

3 amps @ 277 VAC5 amps @ 30 VDC

Analog Output (Optional): 4 to 20 milliamp output proportional to full scale setting. Maximum loop load resistance – 600 ohms.

Trip Reset Options: Automatic: Automatic trip reset may be selected on the display/control module.Manual: Trips may be reset manually on the display/control module.Remote: Trips may be reset remotely using a momentary external

mechanical or solid state switch.

At low loads, motoramperes do notchange much withsmall changes in pumploads. Small signalchanges can cause falsetrips or allow equip-ment to operate belowthe desired minimumoperating point.

At low loads, power islinear. Small changesin pump operatingloads provide greatersignal changes. TheKW941 is more sensi-tive to pump loadchanges and offerseasier setup, more reli-able equipment protec-tion and no false trips.

Durco KW941 Pump PowerMonitor ™

POWER M

ONITOR

Power

Curre

nt

0% Motor Load 100%

Typical Low Flow/

No Flow PumpProtection Zone

Pow

er/C

urre

nt


58

Extending MTBPMBy Reducing

Internal Stress AndVibration In TheProcess Pump System Package

Flowserve is recognizedworldwide as thepremier name in ANSIpump performance. Itstechnologically advancedproduct enhancementshave extended MTBPMto new levels.

By implementingGood Pump Practice,peak operating perfor-mance and economycan be further improved.

Installation• Level pump/base/

motor – free of softfoot conditions

• Provide 10 diametersof straight pipe tosuction inlet. Flow con-ditioning technologymay be an option

• Rigid baseplate design– reinforced stilt orgrout installedbaseplate

• Grout with low shrinkcement; epoxy groutpreferred

• Special cleaning andprimer to bond basewith epoxy-type grout

• Piping design toassure minimal stress(fasteners installedwithout force)

Selection• Sizing with less than

maximum synchronousspeed rpm wherepractical

• Impeller trim from 95 to 60% of maximum with 75% optimal

• Operate from 85%to 110% of BEP

• NPSHa 20% or 5 ft(1.5 m) over NPSHr,whichever is greater

• Consider variablespeed technology formultiple operatingpoint conditions

Balance• Impeller balanced to

0.011oz in/lb (20 gm-mm/kg), after trim-ming. Two-plane spinbalance when outsidediameter to widthratio <6 and singleplane when ≥6

• Coupling balanced toAGMA 8 (AGMA 10over 75 hp (56 kW) )Coupling to be elas-tomer type for softstart

• Offset pump andmotor shaft/couplinghub keyways 180° andcut keys to one-halfunfilled keyway length

These seven generalprinciples apply to sealedand sealless pumps.

GoodPumpPractice


59

Alignment •Use laser or reverse dial

indicator technology.Recommendedtolerances to: parallel0.002 in (0.05 mm) FIM;angular 0.0005 in/in(0.0005 mm/ mm) FIM

•Align before and afterpipe-pump bolt-up

•Specify bolting to fitwithout force to con-nect pump and pipe

•Consider C-flangemotor adapter forpumping temperatures>200°F (93°C) or hotalign after start-up

•Consider C-flangemotor adapter whenpumping temperaturesfluctuate >100˚F (38°C)

•For pumping tempera-tures >350°F (177°C)consider centerlinemounted casing andinclude C-flange adapter>500°F (260°C)

PreventiveMaintenance•Change lubricant at

recommended intervals•Protect lubricant from

contamination•Use sealed or “vapor

block” power endprotection and synthet-ic lubricant to reducerelubrication intervals

•Maintain mechanicalseal flush environment.Eliminate the need forflush with alternate sealand seal chamberdesigns when possible

•Maintain power endand mechanical sealsin a “clean room”

•Predictivemaintenance, vibrationmonitoring andlubricant analysis arestill good practice

Operation• Develop suitable

start-up proceduresand checklists

• Avoid rapid closing ofprocess valves (nowater hammer)

• Use a power monitorfor minimum/ maxi-mum flow protection

• Add minimum flowbypass as required

• Consider soft start forfrequent on-off duty

• Consider variablespeed technology forinherent soft start,reduced RPM andincreased efficiency

• Do not run dry. Checkfor submergence con-ditions, particularlyin batch operation.Select pump/seal typeaccordingly

• Operate spare pumpevery three (3) months

Design/Specifications• Use solid shafts –

Index of Deflection:(I = L3D4) Group I < 75Group II

3500 rpm < 401800 rpm < 65

Group III ≤ 25• Use cartridge seals

designed to reducefretting corrosion andfor proper setting100% of time

• Maintain criticalimpeller settingtolerances to hold lowthrust load and sealchamber pressure

• Specify state of the artseal chamber designsthat offer anti-rotationfeatures to reduceabrasion, vaporization,heat and cavitation atthe mechanical seal

• Pump manufacturerto be responsible for“Total Engineered SealSystem” (TESS)

• Rigid, cast iron motorfoot construction with≥ 182T(S) frame sizes

Note: Some items aremore critical for longerterm installations andbecome economical whenlife cycle cost considera-tions are applied. Forfurther information,contact a Flowservesalesperson.

GOOD PUMP PRACTICE


DurcoMark III ANSI Standard

Mark III ANSI ProcessHeavy-duty chemicalservice pump conformsto ASME B73.1M ANSIStandard design criteriaand dimensions as well as to the design require-ments of ISO 5199.

Guardian® Magnetic Drive ANSIFeatures leading edgesealless pump technologyto meet ANSI Class 150and 300 lb operatingcriteria to 550°F (288°C),meets HI5.1-5.6 1992standards.

NonMetallic ANSIProprietary solid FRPwith optional patentedlining processes offersexcellent strength,corrosion resistance and economy.

Ahlstar® High volume pumpingcapacity to 30,000 gpm(6,818 m3/h) for a widerange of process, plantutility and coolingapplications.

Chemstar® ISOExceeds the design andconstruction requirementsof ISO 5199 for centrifugalpumps Class II, and thedimensional requirementsof ISO 2858, BS5257, DIN 24256 and NFE 44121.Also available inmagnetic drive design.

Chemstar ISO and Mark III ANSI pumpsprovide similar advancedfeatures and customerbenefits for much of thetotal process industries.

TheWorldwidePumpCompany

www.durcopump.comEmail: [email protected]

THE AMERICASFlowserve CorporationRotating Equipment DivisionDayton, Ohio 45401Telephone: 01-937-226-4000Telefax: 01-937-226-4325

EUROPES.A. Durco Europe N.V.A unit of Flowserve CorporationRotating Equipment Division6 rue de GeneveB-1140 BrusselsBelgiumTelephone: 32-2-702-9600Telefax: 32-2-702-9649

ASIA PACIFICDurco-Valtek (Asia Pacific) Pte. Ltd.A unit of Flowserve CorporationRotating Equipment Division543 Yishun IndustrialPark A #03.00Singapore 768765Republic of SingaporeTelephone: 65-755-0095Telefax: 65-755-0579

© Flowserve CorporationMarch 1998

Printed in U.S.A.

Sealless MetallicANSI/ISO

Sealed MetallicANSI/ISO

Sealed & SeallessNonMetallicANSI/ISO/JIS

Flowserve has numerous manufacturing, sales, andservice operations throughoutthe world. Please contact oneof the regional centers todetermine the location of the nearest office.

Or consult your local stocking distributor


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