SeallessCentrifugal Pump

Type SLM NV

2

Sufficient pressure is maintainedwith all internal re-circulation inorder to be able to safelycontrol liquids which are beingprocessed close to boiling point.

Flushing System

self-venting and fully drainable. In connection withberings with dry runningcapability it is made of zirconium oxide.

Isolation Shell

Hydraulic measures reduceaxial thrust for the complete per-formance range.

Thrust Bearing Load

Double bearing made of SSiC.Counter centered combinationsensure the universal use with different temperatures.

Journal Bearings

Hub fastened with screws.Short-circuit body withmechanical rub ring.

additional heating throughjacket heating with direct heattransfer to the isolation shell.

Bearing LanternSLM NVA revolution in pumpconstructionThis new pump manufactured toDIN EN 22858 is much more thanjust another modification to a well

pumps.

With the SLM NV Klaus Union ispresenting a completely newpump manufactured to the higheststandards and designed to offeryou the best and most economicsolution to your pumpingproblems.

Our considerable experience inthe Chemical and Petrochemicalindustry handling aggressive, toxicand explosive fluids under themost severe safety conditions hastaught us that maximum flexibilityis of prime importance. Optimuminterchangeability of parts andaccessories coupled to short deli-very times can be guaranteed.

Only a completely new pumptype can solve these problems.Klaus Union has the best precon-ditions for this business:More than 40 years experiencein development, construction,production and application ofmagnet drive pumps.

Also for the new pump type SLM

The sealex system eliminates the

the motor torque is transmitted to

the absence of any mechanicalcontact.

The „V“ of the pump type SLMNV means „variable“ as a resultof the modular construction.These are the criticaldevelopment purposes: As fewparts as possible should be usedand they should where possiblebe multi-functional. So a volumeproduction with marketableprices is promoted with essential

The new SLM NV turns designvariations into standard designs.Individual demands of the custo-mers can be realized in shorttime with reduced storage.

Become acquainted with thisrevolution in pump construction!

established range of centrifugalNV sealex this universal success-ful safety system with magnet

need for shaft passages since

drive is used.

the perfectly sealed chambers in

tions and accessories.advantages for all design varia-

Magnet Drive

3

Reduces the heat transfer to thebearing support (or motor in thecase of close coupled pumps)where high operating temperatures are required.

Thermal Barrier Prevents liquid from entering theatmosphere in the unlikely eventof isolation shell failure.

Secondary Sealing

with mechanical rub ring.

Magnet Carrier

Grease lubrication with grease distributor andregreasing facility. Oil lubrication for high operating temperatures incorporates a thermal barrierand secondary sealing.

Bearing Support

Subject to alterations

4

SLM NV acc. to DIN EN 22858In the following is a selection out ofmany variations:

� SLM NVN Basic design · grease lubrication ·from -120°C up to +250°C

� SLM NVO Oil lubrication · thermal barrier ·secondary sealing · heated bearinglantern · from -120°C up to +300°C

� SLM NVS dry running capability · grease lubrication · thermal barrier · secondary sealing

� Modular Combination System Due to the variable modular system,each combination variation is possible. All parts are conforming to each other! Each combination can be made individually according to your requirements.

� SLM NVBBasic design · close coupled · from -120°C up to +160°C

� SLM NVBclose coupled · heated bearing lan-tern · thermal barrier · secondarysealing · from -120°C up to +250°C

� SLM NVBclose coupled · fully heated ·thermal barrier ·secondary sealing

� SLM SVS SLM SVBSide channel pump · close coupled · fully heated ·

thermal barrier · secondary heating

SLM NVThe modularconcept makeseverythingpossibleThis is a new and revolutionarydesign:

The modular system allows eachcustomer to „put together“ thepump that meets his particular special requirements.

To meet this need a wide range ofmodules and safety components

developed and designed to

provide maximum flexibility and the perfect solution to your particular pumping application.

The new SLM NV modular concept offers maximum flexibility:

Grease or oil lubrication, close coupled, secondary sealing, thermalbarrier, dry running capability, heating and cooling arrangements,centreline mounting and evenpumps to ANSI and API standards.

The illustrations show a fewexamples – but only some out of

Call us about your particular application or problems and we will show you what the best solution will look like.

� �

�

� �

�

coordinate with each other to

the many variations available.

selfpriming · from -120°C up to +250°CSide channel pump · process type · 1-8 stages ·

are available. All parts have been

5

Rub Ring ProtectionIn the event of journal bearing orball bearing failure, the rub ringsprevent immediate damage to the

conjunction with an input power

drive motor. (LC Controller)

Replacement of Anti-friction Bearings and Secondary Sealingwithout Draining of PumpBy splitting the bearing bracket intobearing lantern and bearing support,wear parts (anti-friciton bearings and radial lip seals) can bereplaced without costly disassemblyand draining of the pump. Thesame applies to the replacement of the motor in case of a close coupled pump.

Temperature SensorThe internal recirculation can bemonitored by measuring the tempe-rature of the isolation shell.

Load Detector (LC)This monitors the shaft power andtrips the pump if it detects under-load caused by cavitation, flow interruption or desynchronisation of the magnetic drive or overloaddue to mechanical contact of the rub rings.

SLM GVSMulti-stage casing pump · process type · 1-4 stages ·from -120°C up to +250°C

� SLM GVOMulti-stage casing pump · process type ·

fully heated · thermal barrier · secondary sealing ·

oil lubrication · from -120°C up to +300°C

�

�

�

SLM NVSystematicdesign withsafety in mindKlaus Union has taken full advantage of over 40 yearsexperience in the design andmanufacture of magnetic drivepumps.

We fully appreciate the highsafety requirements demanded bythe markets we serve and this isalways reflected in the designand construction of the pumpsand monitoring systems.

The design and concept of thiscompletely new pump takes fulladvantage of our experience anduses well proven techniques andtechnology.

Subject to alterations

Diff

eren

tial h

ead

m

n = 1450 min-1

Capacity m3/h

Diff

eren

tial h

ead

m

n = 2900 min-1

Capacity m3/h

isolation shell from either the inside

effective they must be used in

monitoring arrangement on the

or outside. For the rub rings to be

6

With the new design system theaxial loads on the thrust bearingsare significantly reduced acrossthe entire operating range of thepump.

0 50 100 150 200 250 300 350 400 450

T [˚C]

T [˚C]

160

140

120

100

80

60

40

20

0

0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,60

0,2

0,4

0,6

0,8

1,0

0 0,2 0,4 0,6 0,8 1,0 1,2 1,4 1,60

0,2

0,4

0,6

0,8

1,0

1,2

1,4

Q/Q [-]optQ/Q [-]opt

[%]Qopt

QT [-].g.Hopt

p - p1 2

Q/Qopt [-]0 0,2 0,4 0,6 0,8 1,0 1,2 1,4

1,0

0,8

0,6

0,4

0,2

0

Q/Qopt =1

4

3

2

65

1

FaxFax, Q=0

[-]

The thermal barrier protects thebearing support from high liquidor heating chamber temperatures.It works like an air coolerproviding a large surface area for the dissipation of heat by convection. For the first time thethermal barrier permits the use ofclose coupled pumps at high operating temperatures.

In case of damages it protects thebearing support (with close coupledpumps the motor equally) from thepump liquid and prevents the liquidfrom exhausting to the atmosphere.

This completely new design ofwear resistant journal bearingmanufactured in SSiC is used universally across the range. Thedifferent coefficients of expansionof the materials used are compensated for both axially andradially by a counter centringdesign. The operating range ofthe new bearing cartridge is from-120°C up to +300°C.

The internal recirculation ensuresthat adequate pressure is maintained at all times permittingthe safe use of the pump even onliquids close to their boiling point.The flush flow is taken from an area with reduced solids and isseparated into two distinct flowpaths. Flush flow QT1 dissipatesthe frictional heat generated by the

T2

dissipates the heat generated byeddy current losses in the isolationshell. This flushing system provides

and pressure even when the pumpis misused.

ThermalBarrier

SecondarySealing

JournalBearing

FlushingSystem

ThrustBearing Load

QT1

QT2

Ball Bearing Temperature

with thermal barrier

without thermal barrier

Product

20°C up to 120°C 120°C up to 250°C

Differential PressureInternal RecirculationCapacity

Axial Thrust

Temperature Range: Temperature Range:

journal bearing. Flush flow Q

an almost constant flush flow rate

7

Due to the cartridge with anti-friction bearings made of siliconnitride and a non-metallic isolationshell made of zirconium oxide orplastics, this pump can beconsidered a pump with dryrunning capability.

The pump with dry running capability is equipped with secondary sealing.

Dry runningcapability

●

●�

●� ●�

●� ●�

QT1

QT2

p1

p2

Subject to alterations

subj

ect t

o al

tera

tions

02.

05.1

06 e

Pumps

Chemical centrifugal pumps acc.DIN EN 22858

Multistage casing pumps

Horizontal and vertical propellerpumps

Bottom flange propeller pumps

Vertical centrifugal pumps(Nobox system)

Submerged pumps

Double-suction chemical pumps

Special designs

ProductionProgrammeValvesGlobe valves with stuffing box

Globe valves bellow sealed

Check valves

Gate valves

Swing check valves

Strainers

Sight glasses

Bottom valves

Relief valves

Control valves

High pressure valves

Valves for cryogenics

Valves with electric orpneumatic drive

Our Service:Very close tocustomers –all over theworldThis most unique drive system,a wide range of products inbest quality as well as manyyears of experience have madeKLAUS UNION a worldwideleading supplier of pumps withmagnet drives and valves.All over the world we arerepresented with our owncompanies, sales offices andagencies. All over the world weare offering complete servicesfrom perfect proposals andadvice up to technical after-sales service.

Klaus UnionGmbH & Co. KG

Blumenfeldstr. 18D-44795 Bochum

P.O. Box 101349D-44713 Bochum

Phone 0049 (234) 45 95-0Fax 0049 (234) 43 23 87

Internet: http://www.klaus-union.deE-Mail: info@klaus-union.de

ProductionProgrammePumps

drives

Chemical centrifugal pumps acc.to DIN EN 22858

Chemical centrifugal pumps inclose coupled design

Multistage casing pumps

Side channel pumps

Vertical centrifugal pumps

Submerged pumps

Self-priming spiral casing pumps

Screw pumps

Special designs

SLM agitator drives

Plastic chemical pumps acc. toDIN EN 22858

SLM-CIP (cleaning in place)for food andpharmaceutical industry

pumps acc. to API 685

SLM-Pumps with magnet

Oil refinery centrifugal