Series 1, 2 & 3 Nominal Volume at 1725 RPM
See note at bottom

Flow
Rate
(GPH)

Gallons Per Hour
Pressure (PSI)

Brake Horsepower
Pressure (PSI)

50

100

150

200

250

50

100 150 200 250
140 143 141 139 137 135 0.17 0.28 0.40 0.52 0.63
125 128 126 124 122 120 0.16 0.26 0.36 0.47 0.57
110 111 109 107 105 103 0.15 0.25 0.34 0.44 0.54
100 102 100 98 96 94 0.13 0.20 0.28 0.35 0.42
80 82 80 78 76 74 0.12 0.18 0.25 0.32 0.39
70 72 70 68 66 64 0.11 0.17 0.24 0.30 0.37
60 62 60 58 56 54 0.10 0.16 0.23 0.29 0.35
50 52 50 48 46 44 0.09 0.15 0.21 0.27 0.33
35 37 35 33 31 29 0.08 0.14 0.19 0.24 0.29
25 27 25 23 21 19 0.07 0.12 0.17 0.22 0.27
15 17 15 13 11

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0.06 0.10 0.15 0.19

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Capacities & Horsepower Graph

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 Note: Nominal flow rating for each pump is based on operating the pump at a speed of 1725 rpm, at a discharge pressure of 100 psi, with 70 F tap water as the fluid.  The values are measured averages; individual pumps will deviate from these values.  Because the pumps are positive displacement pumps, the discharge flow (in gallons per hour) is directly proportional to the speed at which the pump is being driven (800 rpm - minimum, 1725 rpm - maximum for series 6,  2300 rpm - maximum for Series 1, 2, 3, 4 & 5).  Use these charts to find your actual flow and minimum power requirements.