heavy duty super duplex stainless steel submersible acid
TRANSCRIPT
Heavy Duty Super Duplex Stainless Steel Submersible Acid Resistant Slurry Pumps
Number One for Reliability,Strength & Endurance
www.goodwinafrica.com
5
10
20
30
40
50
60
70
Hea
d in
Met
res
Flow - Cu Metres / Hour
1000 200 300
100NZE
100ANZE®
100HNZB
SDSS SDSS SDSS 100 100 100 NZE ANZE® H NZB
Max solid content 65% 65% 25%
Max specific gravity kg/l 2.8 2.8 1.5
Max particle size 25mm 32mm 12mm
Max slurry temperature 90°C 90°C 90°C
Max flow m3/hr 137 220 160
Max head 33m 38m 60m (pressure bar) (3.3 bar) (3.8 bar) (6 bar)
Max submergence depth 28m 28m 28m
Goodwin Standard SDSS Construction
Material Pitting Resistance (PREn)
Pump Body
25% Cr Super Duplex Typically
A890 Gr 5A / UNS 32750>40
Impeller, Inducer & Wear Plate**
Fasteners
Pump Shaft
Cable Fluorethylene propylene FEP Both chemically and heat resistant
Elastomeric Seals FEP Encapsulated Viton Both chemically and heat resistant
Mechanical Seal Fully Sintered Silicon Carbide
Other Inconel 625 >45
Other PTFE Chemically Inert
** Because material that is chemically resistant to acidic applications are softer than what would be used when pumping slurries, the wear components are coated to give a chemically resistant surface hardness of >47 HRC; equivalent to the hardness found in alloyed white iron components usually found in heavy duty slurry pumps. As Goodwin manufacture these pumps - should there be any specific material requirements that your process requires; if our standard specification is not already exceeding your requirements, we can manufacture out of any alloy that is readably castable and machinable, should your requirement require different materials of construction.
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Goodwin have designed and manufactured Submersible Slurry Pumps for over thirty years.
The original design brief included a formidable list of criteria:• A motor enclosure which eliminated electrical
motor over heating and burnout.
• A motor with reserves of power to enable direct online starting when in settled sump solids.
• Design an integral inducer to break down and re-suspend settled solids.
• Develop a mechanical sealing system which was not subjected to the pumped media pressure.
• Create a cable gland entry and motor configuration which kept the terminal enclosure separate from the motor enclosure.
With our market leading design for dealing with heavy and abrasive slurries, by customer request we have developed a Super Duplex Stainless Steel (SDSS) variant of our internationally successful 100mm Submersible Slurry Pump specifically for acidic applications where there are no reliable alternatives.
Goodwin Pumps are now sold on four continents with centres of excellence for sales and service in Europe, India, China, Brazil, South Africa and Australia.
30
25
20
15
10
Kilo
Wat
ts
20
40
30
50
60
10
70
Effic
ienc
y %
Flow - Metres3 / Hour
50 100 150 200 225
Hea
d in
Met
res
0
10
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15
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10
5
Kilo
Wat
ts
20
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60
10
Effic
ienc
y %
Flow - Metres3 / Hour
25 50 75 100 125 137
Hea
d in
Met
res
0
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40
100
HN
ZB30
kW, 1
450
RPM
(50
Hz)
100
ANZE
®30
kW, 1
450
RPM
(50
Hz)
100
NZE
30kW
, 145
0 R
PM (
50H
z)
% Eff
kW Sg 1.0
H/Q
% Eff
kW Sg 1.0
H/Q
H/Q
% Eff
kW Sg 1.0
Hea
d in
Met
res
Flow - Metres3 / Hour
20
40
30
50
60
10
Effic
ienc
y %
050 100 150 200
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15
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Kilo
Wat
ts
100mm Pump Curves
Electrical Data30kW, 1450RPM - NZE, ANZE® & HNZB 100mm
380 V 58 A 300 A 14 A 100 A
415 V 54 A 280 A 13 A 100 A
525 V 42 A 220 A 10 A 100 A
660 V 33 A 170 A 8 A 80 A
1000 V 22 A 120 A 6 A 50 A
Inrush Full Current No Fuse Load Direct Load Size Volts Current on line Current (HRC)
The Goodwin agitator is much closer to the lower bearing (390mm) and as such the bending moment on the shaft, when it comes into contact with large particles, is much less.
The Goodwin Agitator which was granted a patent sends shock waves down below the pump making settled solids start to flow similar to tapping ones foot on the sand on a beach.
The Goodwin pump motor runs submerged in oil which lubricates the bearings and transmits heat from the stator winding, the hottest part of the motor, to the high mass stator housing that acts as a heat sink.
The Goodwin pump benefits from forced convection cooling by nature of the pumped fluid passing around the motor housing before it leaves the pump. This allows the pump to run all day even if it is only semi submerged without overheating.
This feature assists the break down of large particles in the impeller that might ultimately lead to a blocked pump.
All Goodwin SSDS pump Wet-End components are coated with a Nickel based Super-Alloy coating which is extremely corrosion resistance to oxidising acids, resistant to severe abrasion, metal to metal wear, hot abrasion, impact, and has a low coefficient of friction. This is a standard feature on all Goodwin SDSS pumps.
SUBMERS IBLE SLURRY PUMPF E AT U R E C O M PA R I S O N
The Goodwin pump uses high quality copper end plates and bars in their rotor that are brazed together where the melting point of the braze is 787°C
ROTOR END PLATES AND ROTOR B ARS
The Goodwin mechanical seal is only subjected to the pressure from the submergence depth of the pump which generally is only a few metres of head.
This puts a balanced load on the shaft giving less vibration leading to longer mechanical seal and bearing life.
O IL F I LLED MOTOR HOUS ING
COOLING OF THE MOTOR HOUS ING
MECHANIC AL SEAL PRESSUR ISAT ION
OPEN VANE IMPELLER
HEAVY DUTY WET-END PARTS
TWIN VOLUTE C AS ING
SLURRY PUMP AGITATOR
AGITATOR EFFECTThick section casting for long term corrosion resistance and reliability in acidic conditions.
TH ICK SECT ION C AST ING
Many agitators are much further away from the lower bearing (560mm) and as such there is a high bending moment on the shaft when the agitator comes into contact with large particles giving rise to premature mechanical seal failure and or bent shaft.
Some agitators merely assist solids that they come into contact with to flow towards the pump inlet. They do NOT have the same effect as the Goodwin agitator.
Motors often run in air which is a poor thermal conductor causing overheating and cut out under heavy load and or semi submerged conditions.
Standard pumps have no cooling around the motor housing and as such will overheat when pumping semi submerged. There is an optional extra to have motor cooling which would require a clean water supply.
Closed vane impellers are prone to getting blocked by one or more large particles and they tend to stay blocked.
On closed vane designs, it is not possible to coat the Impeller and the only remedy is to supply high chrome which has less than half the life of a coated Impeller and is more brittle and tends to go out of balance quickly due to chipping.
SUBMERS IBLE SLURRY PUMPF E AT U R E C O M PA R I S O N
Some pumps use aluminium end rings and bars in their rotors which have a lower melting point of 507°C and being die-cast, are susceptible to porosity which can lead to premature rotor failure under severe conditions.
ROTOR END PLATES AND ROTOR B ARS
Mechanical seals can be subject to the pumped pressure especially on a closed head or blocked pump which subjects the mechanical seal to much higher pressures which shortens the seal life.
Pumps with a single volute casing put an uneven load on the shaft increasing vibration which can lead to premature mechanical seal failure.
EXAMPLE OF A TYPICAL SUBMERSIBLE
SLURRY PUMP
OIL F I LLED MOTOR HOUS ING
COOLING OF THE MOTOR HOUS ING
MECHANIC AL SEAL PRESSUR ISAT ION
OPEN VANE IMPELLER
HEAVY DUTY WET-END PARTS
TWIN VOLUTE C AS ING
SLURRY PUMP AGITATOR
AGITATOR EFFECT Normally fabricated from thin plate giving substantially less resistance to corrosion.
TH IN FABR IC ATED WALLS
Pump Power Speed Weight Dimensions mm Outlet Size kW RPM kg Dia. mm A B C SDSS 100NZE 22/30 1450 710 1285 500 318 100mm PN10
SDSS 100ANZE® 30 1450 750 1290 530 318 100mm PN10
SDSS 100HNZB 30 1450 820 1290 660 318 100mm PN10
B
C
A
Weights & Dimensions
The materials of construction shown with solid lines offer good corrosion resistance against both Sulphuric and Hydrochloric Acids, as can be seen in the isocorrosion graphs below.
As this pump can handle slurry – material hardness needs to be taken into consideration as well as the chemical corrosion resistance to provide the best all round solution. Otherwise whilst being corrosion resistant the pump would wear out prematurely by erosion.
140
120
100
80
40
60
20
Tem
pera
ture
°C
0 20 40 60 80 100
H2SO4, weight-%
Boiling Point
AISI 316
A890 4A
ASTM 904L
A890 5A
A89
0 4A
AISI 316
A890 5A
C276
INCONEL 625
A890
6A
120
100
80
40
60
20
Tem
pera
ture
°C
0 1 2 3 4
HCI weight-%
A890 5A
Boiling Point
AISI 316
ASTM 904L
C276INCONEL 625
Isocorrosion diagram in naturally aerated sulphuric acid. The curves represent a corrosion rate of 0.1 mm/year (4 mpy) in a stagnant test solution.
Isocorrosion diagram in naturally aerated hydrochloric acid. The curves represent a corrosion rate of 0.1 mm/year (4 mpy) in stagnant test solution.
Chrome Molybdenum Nitrogen PREn (Typical) Hardness (HB)
Hastelloy C-276** 15 16 - 67.8 180
Inconel 625** 21.5 9 - 51 163
254 SMO 20 6.2 0.2 43.7 147
A890 Gr 5A 25 4.1 0.3 43.3 241
904L 20 4.6 - 35 174
A890 Gr 4A 22 3 0.15 34.3 235
AISI 316 16.5 2 - 23.1 179
AISI 304 17.5 - - 17.5 153
(PRE)n = Cr + 3.3xMo + 16xN ** Would be subject to obtaining an export licence
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200ANZE®150
ANZE®100
ANZE®100
SDSS
200MM - 112kW2725kg
150MM - 90kW1950kg
100MM - 30kW750kg
100MM - 30kW750kg
Dirty Water High Head
100MM - 90kW1990kg
150MM - 150kW2750kg
150DWHH
100DWHH
Submersible Slurry PumpsAcid Resistant
Goodwin Submersible Pumps Africa PTY LtdUnit 1 Bridgeway Business ParkCorner of Sam Green Road & Pinnacle CloseTunney Extension 9Germiston, 1401 South Africa
Tel +27 (0)11 568 9877Email [email protected]
Hendrick Lubisi – Regional Sales engineerTel +27 (82) 886 9128Email [email protected]
Fanie Vermaak – Regional Sales engineerTel +27 (72) 518 1077Email [email protected]
Michael Chokwe – Project Sales engineerTel +27 (76) 564 3101Email [email protected]
Rui Gomes – Sales & Marketing DirectorTel +27 (82) 307 4503Email [email protected]
Tienie Potgieter – Operations DirectorTel +27 (79) 498 0724Email [email protected]
Ian Farquhar - DirectorTel +27 (82) 463 3137Email [email protected]
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© Goodwin International Limited 2017
Western Cape Bonanza FarmBotfontein RoadKraaifonteinStellenbosch FarmsSouth Africa
Giel Vorster – Regional Sales engineerTel +27 (82) 731 4109Email [email protected]