Technical Details

Willett Pump Technical Details

Performance Data

Simplex pumps will give flow rate up to 2100 litres / min (~555 gmp). Larger rates are achieved by multiple (manifolded) units operating with electronic sequencing, giving controlled constant flow output.

The multiple pumps operate with a single hydraulic power pack and may optionally include an integrated stand-by power pack for economy and continuance of operation.

Willett Pump Sizing / Performance Chart

Model No. Pump Size Flow Pressure Electrical
m3/hr gpm bar psi kW HP

 6/75/40B

6

 9.2

 41

 5

 75

 4

 5

 6/150/40B

6

 9.2

 41

 10

 150

 5.5

 7.5

 6/300/40B

6

 9.2

 41

 20

 300

 11

 15

 

 

           

 9/75/40B

9

 22.5

 99

 5

 75

 7.5

 10

 9/150/40B

9

 22.5

 99

 10

 150

 11

 15

 9/235/40B

9

 22.5

 99

 16

 235

 15

 20

 9/300/40B

9

 22.5

 99

 20

 300

 18.5

 25

 

 

 

     

 

 

 30/35/05

30

 31.8

 140

 5

 75

 11

 15

 30/35/10

30

 31.8

 140

 10

 150

 18.5

 25

 30/35/16

30

 31.8

 140

 16

 235

 30

 40

 30/35/20

30

 31.8

 140

 20

 300

 37

 50

 

 

 

 

 

     

 35/50/05

35

 48

 211

 5

 75

 15

 20

 35/50/10

35

 48

 211

 10

 150

 22

 30

 35/50/16

35

 48

 211

 16

 235

 37

 50

 35/50/20

35

 48

 211

 20

 300

 45

 60

               

 40/75/05

40

 75

 330

 5

 75

 22

 30

 40/75/10

40

 75

 330

 10

 150

 45

 60

 40/75/16

40

 75

 330

 16

 235

 75

 100

 40/75/20

40

 75

 330

 20

 300

 90

 125

 

         

 

 

 50/110/05

50

 108

475.5

 5

 75

 30

 40

 50/110/10

50

 108

475.5

 10

 150

 55

 75

 50/110/16

50

 108

475.5

 16

 235

 90

 125

 50/110/20

50

 108

475.5

 20

 300

 110

 150

 

 

 

     

 

 

 50/128/12

50

 126

555

 12

 176

 90

 125

All data are based upon water at 20 deg C. Pumps are available for higher pressures and flow rates. As part of our policy for continual development we reserve the right to amend the specification without notice. Pumps fitted with chemical dosing cylinders require larger motors. For intermediate pumps sizes, please contact us.