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Borehole
Submersible
Pumps
for use in:
Residential
Industrial
Irrigation
Agriculture
WATER PUMPS
Where there’s waterthere’s PENTAX
TUVSUD
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
TUVSUD
1
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
TUVSUD
2
CODE
136831
133279
133280
133281
133282
-
-
-
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 50
3
CODE
136832
133283
133284
133267
133268
136833
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 70
4
CODE
136834
136835
136836
133269
133270
136163
136164
136202
136837
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 100
5
CODE
136838
136839
136171
133172
133205
136206
136183
136840
136841
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 110
6
CODE
136842
136189
136197
136198
136199
13620
136843
136844
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 140
7
CODE
136845
136846
136847
136848
136849
136201
136850
136851
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 200
8
CODE
136853
136854
136855
133856
133857
136858
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 260
9
CODE
136859
136860
136861
133862
133863
WATER PUMPS
TUVSUD
PERFORMANCE DATA - MODEL 4S 400
10
WATER PUMPS
TUVSUD
Typical Submersible Borehole Pump Intstallation
11
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
TUVSUD
Cable Selection for Borehole Submersible Motors
12
There are no secrets to a successful submersible pump installation. All that is required is the application of a few basic and easy to understand ground rules and some attention to detail. Lack of knowledge and attempts to cut corners in order to save costs will inevitably lead to expensive corrective measures having to be taken at a later stage.
1. VACUUM BREAKER VALVE ON SURFACE
If a non-return valve is used in pipework on the surface, and the pump is fitted with a similar valve at its discharge, a vacuum can build up between the two valves. This occurs when the lower valve leaks and the top one seals completely. If the static water level is more than 10 metres, the water column inside the pipe separates from the back face of the top valve. When the pump starts, the velocity of the water in the line is speeded up significantly. This high-speed column of water smashes into the back of the sealing mechanism of the top non-return. The resulting shock wave (water hammer) oscillates violently between the submersible’s thrust bearing and the top valve. This shock load can be severe enough to lift a multi-ton rising main up to 200mm off its base.
The vacuum breaker ensures that no vacuum can be created. In its place, a “plug” of air is introduced into the rising main which acts as a compressible “shock absorber” which opens the top valve before the column of water reaches it.
Air release valves must be installed at appropriate points in the surface pipework in order to release this air.
2. SURGE PROTECTION
For the approved surge arrestors to function satisfactorily, the earth lead of each arrestor must be earthed to the motor body. If steel rising mains is used, a copper earth strap must be securely bolted to it. The earth strap is then earthed to the surge arrestors. A driven ground rod is not acceptable as an earthing point.
If a separate earth wire is used, it must be insulated to prevent failure due to corrosion. This wire must always be at least one size larger than the conductors of the submersible power cable.
3. PRESSURE GAUGE
This instrument gives invaluable feed-back on total system head, friction loss in the pipe between the valve and the outlet and the static head between the valve and the outlet. These values are essential for commissioning, cost effective system operation and trouble shooting.
4. UP-THRUSTING
All centrifugal pumps operate best in (approximately) the middle third of their performance curves. If the system head is too low, the pump will deliver a relatively high flow rate. This drastically increases the velocity of the water passing through the pump. The vertical speed of the water creates a strong upward force on the rotating element. This means that both the motor and pump up-thrust bearings are subjected to constant and abnormally high loads. Poor attention to detail when calculating the total head is not the only cause of r.h.s. of the curve operation. Weak boreholes with high static levels and leaking pump non-return valves can create severe up-thrusting conditions.
This situations can be prevented by:
a) Accurate system designb) Fitting a rate of flow control valvec) Using only good quality non-return valves on the pumpd) If there is a large difference between the static and dynamic water levels, a smaller than usual rising main can be used to generate an appropriate amount of friction. This increases total head as a function of flow, which can prevent the pump from operating too far to the right of the curve.
5. LEVEL MEASUREMENT
In order to accurately measure the depth of water in a borehole, a dipper tube of approximately 20mm nominal bore is strapped to the rising main. The lower end is placed just above the pump discharge. The other end of the pipe is terminated above the borehole base plate. The water level can now be measured in two ways:
a) A dip meter probe is inserted in the dipper tube, and it lowered down until a reading is obtained. The dipper tube prevents false readings due to cascading or top filling boreholes.
b) The dipper tube can be connected to a compressor and filled with air. If a pressure GAUGE is fitted to the dipper tube (through a tee-piece), the reading will increase to a maximum at which time the pipe is full of air. The pressure at this point in kPa divided by 9,81(10 is also good enough ) will give the depth in metres at which the end of the pipe is under water.
The water levels in a borehole are the basis of many vital calculations used in system design and trouble shooting.
WATER PUMPS
TUVSUD
Submersible Pump Installation Tips
13
6) CABLE SIZING
Cable sizes must be sized according to the tables published by motor manufacturers and as these tables can be changed from time to time, it is therefore essential that all values be confirmed with a reputable submersible cable manufacturer before purchasing. The cable lengths shown in the charts are from the transformer to the motor and are designed to operate in a submerged condition.
8) NON-RETURN VALVE ON THE PUMP DISCHARGE
This is an essential piece of equipment. Leaking or non-existent valves cause shaft breakages, thrust bearing failure (up and down) and nuisance tripping.
9) MOTOR PROTECTION
The motor must be protected against the following fault conditions:
1) Over-current due to the pump end binding, incorrect motor and pump matching, voltage fluctuations and 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.
10) COUPLING AND SPINE LUBRICATION
Before joining the pump and motor together, the coupling should be half filled with a good quality waterproof grease. Because of the close tolerances between the coupling and motor shaft splines, the pump and motor shafts must be regularly rotated during the assembly process. This allows excess grease to work its way out of the coupling. The internals of the pump could be damaged or jamming of the pump could occur if this procedure is not followed.
11) INDUCER SLEEVE
In order to ensure a low motor running temperature, it is essential that the air/gas bubbles, which build up on the outside of the motor shell, be removed. A sleeve manufactured from plastic of stainless steel must be fitted over the motor and pump inlet. The lower end is left open while the top end is sealed. This forces the pump to draw its water past the motor before it can reach the inlet. The relatively high velocity past the motor provides the kinetic energy necessary to remove the bubbles and provide a constant flow of cooler water past the motor.
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
ĦJ 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 kVAĦJ 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
TUVSUD
Submersible Pump Installation Tips
14
Where there’s Water, there’s Pentax
WATER PUMPS
TUVSUD
DISCLAIMERWhilst every care was taken in compiling this data, information and related material contained herein are subject to change without notification. All detail that this document contains are provided in good faith and therefore no representation or warranty whatsoever regarding the completeness, accuracy, “up to date”, or adequacy of, suitability, functionality, ommission, or operation is specifically disclaimed of any liability for direct, indirect or consequential loss or damage, however so arising, from the use or reliance on information herein thereafter provided.
INCLEDONGERMISTON Tel: 011 323 0800
KLERKSDORP Tel: 018 462 0009
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: 041 409 8000DURBAN Tel: 031 716 2200
POLOKWANE Tel: 015 292 8660LEPHALALE Tel: 014 763 5824
BURGERSFORT Tel: 013 231 7224
DPI TRADING (Western Cape)CAPE TOWN Tel: 021 957 5600 GEORGE Tel: 044 874 2327
WELKOM Tel: 057 396 1131RUSTENBURG Tel: 014 591 7700 UPINGTON Tel: 054 332 1089
