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Becktech's range of RO pumps covers membrane capacities from 25 litres per day up to 1,000 litres per day and at different voltages. Diaphragm pumps are typically the work horse at the low voltage / low capacity units, while rotary vane pumps will meet the higher specification requirements. The chart below will help you to size the pump you need. Most pumps are available from stock.
A diaphragm pump, with integrated motor. ![]() |
A rotary vane pump, which requires a driving motor.
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Nominal |
Litres of RO water output (based on 20% recovery rate) |
Nominal |
Part number
|
||||
Pressure |
Flow rate |
||||||
GPD |
24 Hr day |
12 Hr day |
10 Hr day |
8 Hr day |
Bar |
LPH |
|
45 |
173 |
86 |
72 |
58 |
6.8 |
36 |
A8850-2P01-T544 |
75 |
288 |
144 |
120 |
96 |
5.0 |
60 |
A8852-2P01-T544 |
Nominal |
Litres of RO water output (based on 20% recovery rate) |
Nominal |
Part number
|
||||
Pressure |
Flow rate |
||||||
GPD |
24 Hr day |
12 Hr day |
10 Hr day |
8 Hr day |
Bar |
LPH |
|
100 |
360 |
180 |
150 |
120 |
5.5 |
75 |
A8852-2J03-V493 |
For use with transformer, part number TACS234-48RF.
Nominal |
Litres of RO water output (based on 20% recovery rate) |
Nominal |
Part number
|
||||
Pressure |
Flow rate |
||||||
GPD |
24 Hr day |
12 Hr day |
10 Hr day |
8 Hr day |
Bar |
LPH |
|
70 |
259 |
130 |
108 |
86 |
6.8 |
54 |
A8850-2P01-T424 |
60 |
226 |
113 |
94 |
75 |
5.5 |
47 |
A8852-2J03-B424 |
50 |
202 |
101 |
84 |
67 |
5.5 |
42 |
A8851-2J03-V323 |
25 |
96 |
48 |
40 |
32 |
5.5 |
20 |
A6840-2J03-V221 |
High flow vane pumps with 230v single phase motors.
Nominal |
Litres of RO water output (based on 20% recovery rate) |
Flow rate @ 100 psi / 6.8 Bar |
Part number
|
||||
Actual |
Nominal |
||||||
GPD |
24 Hr day |
12 Hr day |
10 Hr day |
8 Hr day |
LPH |
LPH |
|
300 |
1080 |
540 |
450 |
360 |
225 |
200 |
PO204X |
400 |
1603 |
802 |
668 |
534 |
334 |
300 |
PO304X |
500 |
2083 |
1042 |
868 |
694 |
434 |
400 |
PO404X |
600 |
2496 |
1248 |
1040 |
832 |
520 |
500 |
PO501 |
700 |
2976 |
1488 |
1240 |
992 |
620 |
600 |
PO601 |
900 |
3456 |
1728 |
1440 |
1152 |
720 |
700 |
PO701 |
1000 |
3936 |
1968 |
1640 |
1312 |
820 |
800 |
PO801 |
There are two motor options available - close coupled, medium duty and flexible coupled heavy duty. Use the table below to size the motor for the above vane pump.


Nominal |
Medium duty, close coupled motor (8 hr duty) |
Heavy duty, flexible coupled motor (10-24 hr duty) |
GPD |
||
300 |
FC0115.05 |
FLM71-C4 |
400 |
FC0115.05 |
FLM71-C4 |
500 |
FC0115.05 |
FLM71-C4 |
600 |
F110380-19 |
FLM71-L4 |
700 |
F110380-19 |
FLM71-L4 |
900 |
F110380-19 |
FLM71-L4 |
1000 |
F110380-19 |
FLM71-L4 |

A proprietary connection, making connection and disconnection of the pump quick and easy, requiring no tools. Replacement fittings also available.
Reverse osmosis is a filtration process that is often used for water.
It works by forcing the water under pressure through a membrane, retaining the impurities on one side and allowing the pure water to pass to the other side.
Not all of the water will pass through the membrane though - typical systems recover between 5% and 20% of the water entering the system. The remainder is discharged as waste water, carrying with it the rejected contaminants.
Membranes are usually rated by thier nominal capacity in gallons per day, but the actual output will vary depending on the input pressure and initial water quality. Our tables on the left are based on an efficiency of 20%, i.e. 1 litre recovered for every 5 litres used.