Wheatley 535/545 Duplex Double-Acting Piston Pump

PUMP English Units 25 RPM 40 RPM 55 RPM 70 RPM 85 RPM
Piston Dia. In. Piston Area Sq. In. BPD per RPM GPM per RPM Max. Press. PSI BPD GPM BPD GPM BPD GPM BPD GPM BPD GPM
535 2.000 3.1416 8.3623 0.2439 796 210 6.1 335 9.8 460 13.4 586 17.1 711 20.7
2.500 4.9087 13.7383 0.4007 509 344 10.0 550 16.0 756 22.0 962 28.0 1168 34.1
3.000 7.0686 20.3074 0.5923 354 508 14.8 813 23.7 1117 32.6 1422 41.5 1727 50.3
3.500 9.6211 28.0766 0.8189 260 702 20.5 1124 32.8 1545 45.0 1966 57.3 2387 69.6
545 2.500 4.9087 13.7383 0.4007 509 344 10.0 550 16.0 756 22.0 962 28.0 1168 34.1
3.000 7.0686 20.3074 0.5923 354 508 14.8 813 23.7 1117 32.6 1422 41.5 1727 50.3
3.500 9.6211 28.0766 0.8189 260 702 20.5 1124 32.8 1545 45.0 1966 57.3 2387 69.6
4.000 12.5664 37.0354 1.0802 199 926 27.0 1482 43.2 2037 59.4 2593 75.6 3149 91.8
4.500 15.9043 47.1943 1.3765 157 1180 34.4 1888 55.1 2596 75.7 3304 96.4 4012 117.0
  Brake Horsepower required 3.7 5.9 8.0 10.2 12.4


PUMP Metric Units 25 RPM 40 RPM 55 RPM 70 RPM 85 RPM
Piston Dia. mm Piston Area cm2 M3/Hr per RPM L/Sec. per RPM Max. Press. kPa M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec. M3/Hr L/Sec.
535 51 20.268 0.0554 0.0154 5487 1.4 0.4 2.2 0.6 3.0 0.8 3.9 1.1 4.7 1.3
64 31.669 0.0910 0.0253 3511 2.3 0.6 3.6 1.0 5.0 1.4 6.4 1.8 7.7 2.1
76 45.604 0.1345 0.0374 2439 3.4 0.9 5.4 1.5 7.4 2.1 9.4 2.6 11.4 3.2
89 62.072 0.1860 0.0517 1792 4.6 1.3 7.4 2.1 10.2 2.8 13.0 3.6 15.8 4.4
545 64 31.669 0.0910 0.0253 3511 2.3 0.6 3.6 1.0 5.0 1.4 6.4 1.8 7.7 2.1
76 45.604 0.1345 0.0374 2439 3.4 0.9 5.4 1.5 7.4 2.1 9.4 2.6 11.4 3.2
89 62.072 0.1860 0.0517 1792 4.6 1.3 7.4 2.1 10.2 2.8 13.0 3.6 15.8 4.4
102 81.073 0.2453 0.0681 1372 6.1 1.7 9.8 2.7 13.5 3.7 17.2 4.8 20.9 5.8
114 102.608 0.3126 0.0868 1084 7.8 2.2 12.5 3.5 17.2 4.8 21.9 6.1 26.6 7.4
  Kilowatts Required 2.7 4.4 6.0 7.6 9.3

For operation below 54 RPM, an auxiliary lubrication system is required.

RPM shown is Crankshaft speed. For Pinion Shaft speed, multiply RPM by Gear Ratio. Volumetric Rate is based on 100% Volumetric Efficiency. Brake Horsepower/Kilowatts Required is based on 85% Mechanical Efficiency.