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.

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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.