Borehole

Submersible

Pumps

for use in:

Residential

Industrial

Irrigation

Agriculture

WATER PUMPS

Where there’s waterthere’s PENTAX

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www.incledon.co.za

DPI TradingDPI Trading

www.dpitrading.co.za

Where there’s water, there’s Pentax

60

50

40

0

0 10 20 30 40 50 Q l/min

1 2 3

PROUDLY IMPORTED BY

PRODUCT CATALOGUE

Description Submersible multistage centrifugal pumps for 4” wells, particularly suitable for water rising and distribution installations requiring very high pressures and flow rates.

Applications Water plants and systems for residential and industrial use, for continuous or inter-mittent duty operation. Pressurizing systems and irrigation plants.

Design features

Motor coupling flange and discharge head are made in stainless steel (AISI 304). Incorporated non-return check valve. Floating type impellers in Noryl Diffusers in non toxic polycarbonate Shell, pump shaft, coupling, cable shield, suction screen external shell and all screws are in stainless steel. Pump flanges for coupling with motors are made according to NEMA standards.

Operating Conditions Max liquid temperature: 30° C Max Sand content: 150 gram/m³

Identification

4 S (T) 100 / 5A

Number of Stages

max Flow Rate l/min

Three-phase

Series

Well dimension 4”

INTRODUCTIONPentax Electrical Submersible pumps are available either with a Franklin or BT (Tesla) submersible electric motor. The pumps are suitable for both single phase (230V) and 3 phase (400V) electricity applications. Pentax pumps are corrosive resistance, manufactured from stainless steel and high technology synthetic material, with optimal resistance to abrasion.

WATER PUMPS

4” S series/ 50Hz Submersible Multistage Pumps

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PERFORMANCE DATA - MODEL 4S 25

4S 25

TYPE P 2

Q (m3/h – l/min)

DNM

Length Weight 0 0.3 0.6 0.9 1.2 1.5

0 5 10 15 20 25

kW HP H (m) mm Kg

4S 25/10

0.37

0.5

67

63

55

46

33

18 324 3.3

4S 25/13

0.37

0.5

86

78

70

56

42

23 377 3.7

4S 25/19

0.55

0.75

126

118

105

86

60

30 481 4.7

4S 25/26

0.75

1.0

173

160

141

117

81

39 642 5.8

4S 25/38

1.1

1.5

253

234

208

169

117

52 864 8.2

1 1/4”

CODE

133343

133276

133277

133278

136830

WATER PUMPS

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CODE

136831

133279

133280

133281

133282

-

-

-

WATER PUMPS

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PERFORMANCE DATA - MODEL 4S 50

CODE

136832

133283

133284

133267

133268

136833

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PERFORMANCE DATA - MODEL 4S 70

CODE

136834

136835

136836

133269

133270

136163

136164

136202

136837

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PERFORMANCE DATA - MODEL 4S 100

CODE

136838

136839

136171

133172

133205

136206

136183

136840

136841

WATER PUMPS

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PERFORMANCE DATA - MODEL 4S 110

CODE

136842

136189

136197

136198

136199

13620

136843

136844

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PERFORMANCE DATA - MODEL 4S 140

CODE

136845

136846

136847

136848

136849

136201

136850

136851

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PERFORMANCE DATA - MODEL 4S 200

CODE

136853

136854

136855

133856

133857

136858

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PERFORMANCE DATA - MODEL 4S 260

CODE

136859

136860

136861

133862

133863

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PERFORMANCE DATA - MODEL 4S 400

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Typical Submersible Borehole Pump Intstallation

These are maximum lengths of cable in METRES from POWER SOURCE TO MOTOR. Exceeding these lengths will void warranty.

SINGLE-PHASE MOTOR MAXIMUM LENGTH COPPER CABLE

Volts kW 1,5 2,5 4 6 10 16 25 35 50 70 960,25 170 280 450 670 1130 1750 2640 3590 4940 6560 81100,37 120 200 320 480 810 1260 1900 2590 3580 4770 59200,55 80 130 220 320 550 850 1290 1760 2430 3230 40000,75 60 100 170 250 430 670 1010 1380 1910 2550 31601,1 40 70 120 180 300 470 710 980 1360 1850 23201.5 30 60 90 130 230 360 550 760 1 060 1 440 18202,2 20 40 60 90 150 230 350 490 680 920 1 160

THREE-PHASE MOTOR MAXIMUM LENGTH THREE WIRE COPPER CABLE

Volts kW 1,5 2,5 4 6 10 16 25 35 50 70 950,37 810 1350 2160 3240 5500 85300.55 550 920 1480 2230 3780 5860 88900.75 410 680 1090 1640 2780 4330 6570 90101,5 220 370 590 880 1500 2340 3560 4890 6830 92302.2 150 250 400 600 1030 1 600 2440 3350 4680 6340 79903 110 190 310 460 790 1230 1880 2590 3630 4930 6230

3,7 90 150 240 370 630 980 1490 2050 2870 3900 49204 80 140 230 340 590 920 1390 1910 2670 3600 4520

5,5 60 110 170 260 440 690 1060 1450 2030 2750 34607,5 50 80 130 200 340 530 810 1110 1560 2120 268011 50 90 130 230 360 550 750 1060 1 440 182015 70 100 170 270 410 570 800 1 080 1370

18,5 80 140 210 330 450 630 860 109022 70 120 180 280 380 540 740 93030 90 130 210 280 400 540 68037 110 170 230 320 440 550

Maximum

Length in

Metres

Maximum

Length in

Metres

Motor Rating

220 Volt 50

Hz

Metric Cable Size, Square Millimetres

Motor Rating

380 Volt 50

HZ

Metric Cable Size, Square Millimetres

INSULATION AND WINDING RESISTANCE AND MAXIMUM CURRENT

Three phase

New motor out of

borehole

Used motor

in borehole

Main winding

black-yellow

Start winding

red-yellow

Each lead to each

other two leads

0,25 220 1 1 Mohm 0,5 Mohm 10.2 39,7 2,1 2,90.37 220 1 1 Mohm 0,5 Mohm 7,4 21.1 2.4 3,90.56 220 1 1 Mohm 0.5 Mohm 4,4 16,0 4,5 5,80.75 220 1 1 Mohm 0,5 Mohm 3.3 13,9 6,1 7,41,10 220 1 1 Mohm 0,5 Mohm 2,7 7.9 7.7 9.51.5 220 1 1 Mohm 0.5 Mohm 2,0-2,5 5.3-6.5 8,9 12,0

2,25 220 1 1 Mohm 0,5 Mohm 1.2-1.5 3.5-4,3 12,1 190,37 380 3 1 Mohm 0,5 Mohm 56,0 1.2 1.10.56 380 3 1 Mohm 0,5 Mohm 39.6 1.5 1,50,75 380 3 1 Mohm 0.5 Mohm 28,0 1,9 1.91.1 380 3 1 Mohm 0,5 Mohm 19.7 2,8 2,9

1,50 380 3 1 Mohm 0,5 Mohm 12,8 3.7 3.72,25 380 3 1 Mohm 0.5 Mohm 7.8-9,6 4,4 5.53.75 380 3 1 Mohm 0,5 Mohm 4,0-5,0 5,4 8,95,60 380 3 1 Mohm 0,5 Mohm 2,1-2.6 8.2 12,77,50 380 3 1 Mohm 0.5 Mohm 1,5-1.9 10.1 16,311,00 380 3 1 Mohm 0,5 Mohm 1,0-1,3 15.6 2415,00 380 3 1 Mohm 0.5 Mohm 0,8-1,0 16.7 3218.5 380 3 1 Mohm 0,5 Mohm 0,5-0,6 20 39,722 380 3 1 Mohm 0,5 Mohm 0,4-0,5 26,4 4730 380 3 1 Mohm 0.5 Mohm 0,37-0,45 39 64,5

37,00 380 3 1 Mohm 0.5 Mohm 0,22-0,29 44,0 79,5

Max. amp

with pump

Max. amp

pumping

Single phase motors: red-black resistance shoud be sum of black-yellow plus plus red-yellow.

rooi-geel te wees. Three phase motors: current may vary up to 10% from one conductor to another,but should average no higher than above.

Motor kW VoltPhase

Fase

Winding resistance

Insulation resistance Single phase

WATER PUMPS

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Cable Selection for Borehole Submersible Motors

There are no secrets to a successful submersible pump 4. UP-THRUSTINGinstallation. All that is required is the application of a few basic and easy to understand ground rules and some All centrifugal pumps operate best in (approximately) the attention to detail. Lack of knowledge and attempts to middle third of their performance curves. If the system cut corners in order to save costs will inevitably lead to head is too low, the pump will deliver a relatively high flow expensive corrective measures having to be taken at a rate. This drastically increases the velocity of the water later stage. passing through the pump. The vertical speed of the

water creates a strong upward force on the rotating 1. VACUUM BREAKER VALVE ON SURFACE element. This means that both the motor and pump up-

thrust bearings are subjected to constant and abnormally If a non-return valve is used in pipework on the surface, high loads. Poor attention to detail when calculating the and the pump is fitted with a similar valve at its discharge, total head is not the only cause of r.h.s. of the curve a vacuum can build up between the two valves. This operation. Weak boreholes with high static levels and occurs when the lower valve leaks and the top one seals leaking pump non-return valves can create severe up-completely. If the static water level is more than 10 thrusting conditions.metres, the water column inside the pipe separates from the back face of the top valve. When the pump starts, the This situations can be prevented by:velocity of the water in the line is speeded up significantly. This high-speed column of water smashes into the back a) Accurate system designof the sealing mechanism of the top non-return. The b) Fitting a rate of flow control valveresulting shock wave (water hammer) oscillates violently c) Using only good quality non-return valves on thebetween the submersible’s thrust bearing and the top pumpvalve. This shock load can be severe enough to lift a d) If there is a large difference between the static andmulti-ton rising main up to 200mm off its base. dynamic water levels, a smaller than usual rising

main can be used to generate an appropriateThe vacuum breaker ensures that no vacuum can be amount of friction. This increases total head as acreated. In its place, a “plug” of air is introduced into the function of flow, which can prevent the pump fromrising main which acts as a compressible “shock operating too far to the right of the curve.absorber” which opens the top valve before the column of water reaches it. 5. LEVEL MEASUREMENT

Air release valves must be installed at appropriate points In order to accurately measure the depth of water in a in the surface pipework in order to release this air. borehole, a dipper tube of approximately 20mm nominal

bore is strapped to the rising main. The lower end is 2. SURGE PROTECTION placed just above the pump discharge. The other end of

the pipe is terminated above the borehole base plate. For the approved surge arrestors to function The water level can now be measured in two ways:satisfactorily, the earth lead of each arrestor must be earthed to the motor body. If steel rising mains is used, a a) A dip meter probe is inserted in the dipper tube, and itcopper earth strap must be securely bolted to it. The lowered down until a reading is obtained. The dipperearth strap is then earthed to the surge arrestors. A tube prevents false readings due to cascading or topdriven ground rod is not acceptable as an earthing point. filling boreholes.

If a separate earth wire is used, it must be insulated to b) The dipper tube can be connected to a compressorprevent failure due to corrosion. This wire must always and filled with air. If a pressure GAUGE is fitted tobe at least one size larger than the conductors of the the dipper tube (through a tee-piece), the reading willsubmersible power cable. increase to a maximum at which time the pipe is full

of air. The pressure at this point in kPa divided by3. PRESSURE GAUGE 9,81(10 is also good enough ) will give the depth in

metres at which the end of the pipe is under water.This instrument gives invaluable feed-back on total system head, friction loss in the pipe between the valve The water levels in a borehole are the basis of many vital and the outlet and the static head between the valve and calculations used in system design and trouble shooting.the outlet. These values are essential for commissioning, cost effective system operation and trouble shooting.

WATER PUMPS

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Submersible Pump Installation Tips

6) CABLE SIZING 10) COUPLING AND SPINE LUBRICATION

Cable sizes must be sized according to the tables Before joining the pump and motor together, the coupling published by motor manufacturers and as these tables can should be half filled with a good quality waterproof grease. be changed from time to time, it is therefore essential that Because of the close tolerances between the coupling and all values be confirmed with a reputable submersible cable motor shaft splines, the pump and motor shafts must be manufacturer before purchasing. The cable lengths regularly rotated during the assembly process. This allows shown in the charts are from the transformer to the motor excess grease to work its way out of the coupling. The and are designed to operate in a submerged condition. internals of the pump could be damaged or jamming of the

pump could occur if this procedure is not followed.8) NON-RETURN VALVE ON THE PUMP DISCHARGE

11) INDUCER SLEEVEThis is an essential piece of equipment. Leaking or non-existent valves cause shaft breakages, thrust bearing In order to ensure a low motor running temperature, it is failure (up and down) and nuisance tripping. essential that the air/gas bubbles, which build up on the

outside of the motor shell, be removed. A sleeve 9) MOTOR PROTECTION manufactured from plastic of stainless steel must be fitted

over the motor and pump inlet. The lower end is left open The motor must be protected against the following fault while the top end is sealed. This forces the pump to draw conditions: its water past the motor before it can reach the inlet. The

relatively high velocity past the motor provides the kinetic 1) Over-current due to the pump end binding, incorrect energy necessary to remove the bubbles and provide a

motor and pump matching, voltage fluctuations and constant flow of cooler water past the motor.single phasing.

2) Under loading due to low water level.3) Phase imbalance.4) Short circuits.

Electronic devices such as the “black bocs” combines relay protection with microprocessor driven intelligent system management. In addition it has the ability to log the last 160 switch-off events. This feature has proven to be a very effective aid in on site as well as remote troubleshooting.

If power is not available, and has to be provided by a generator, the table gives the minimum rating of the generator in KiloWatts (kW) or Kilo Volt Amperes (kVA)

31

GENERATOR RATINGS FOR SUBMERSIBLE MOTORS

KW HP

0.25 1.2 1.5

0.37 ½ 1.5 1.8

0.56 ¾ 2.0 2.5

0.75 1.0 2.5 3.2

1.10 1½ 3.5 4.4

1.50 2.0 4.0 5.0

2.25 3.0 6.0 7.5

3.75 5.0 9.0 11.2

Motor Size

220V or 380VMin. Generator

Rating kW

Min. Generator

Rating kVAKW HP

5.50 7½ 12.5 15.6

7.50 10.0 15.0 18.8

11.00 15.0 22.5 28.0

15.00 20.0 30.0 37.5

18.50 25.0 40.0 50.0

22.00 30.0 45.0 56.5

30.00 40.0 60.0 75.0

37.00 50.0 75.0 94.0

Min. Generator

Rating kVA

Motor Size

220V or 380VMin. Generator

Rating kW

WATER PUMPS

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Submersible Pump Installation Tips

Where there’s Water, there’s Pentax

INCLEDONGERMISTON Tel: 011 323 0800

KLERKSDORP Tel: 018 469 4466 NORTHRIDING Tel: 011 462 7555

BLOEMFONTEIN Tel: 051 408 9200 KATHU Tel: 053 723 2213

NELSPRUIT Tel: 013 752 3121

SECUNDA Tel: 017 631 4200

EAST LONDON Tel: 043 736 6022 PORT ELIZABETH Tel: 041 404 1800DURBAN Tel: 031 716 2200

POLOKWANE Tel: 015 292 8660

LEPHALALE Tel: 014 763 5824

PRETORIA Tel: 012 653 8520

BURGERSFORT Tel: 013 231 7224

DPI TRADING (Western Cape)CAPE TOWN Tel: 021 957 5600 GEORGE Tel: 044 874 2327

WELKOM Tel: 057 396 1131

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