Formula For:
Word Formula:
Letter Formula:
PUMP OUTLET FLOWin Gallons/Minute
FLOW =
RPM x PUMP DISPLACEMENT(Cu. In./Rev.)
231
PUMP INPUT POWER in Horsepower Required
HORSEPOWER INPUT =
FLOW RATE OUTPUT(GPM) x PRESSURE(PSIG)
1714 x EFFICIENCY(Overall)
PUMP EFFICIENCYOVERALL IN PERCENT
OVERALL EFFICIENCY
(%) =
OUTPUT HORSEPOWER
x 100
INPUT HORSEPOWER
EffOV. =
HP OUT
x 100
HP IN
OVERALL EFFICIENCY (%) =
VOLUMETRIC Eff. x MECHANICAL Eff.
EffOV. =
EffVOL x EffMECH
PUMP EFFICIENCYVOLUMETRIC IN PERCENT
VOLUMETRIC EFFICIENCY
(%) =
ACTUAL FLOW RATE OUTPUT(GPM)
x 100
THEORETICAL FLOW RATE OUTPUT(GPM)
EffVOL =
QACT.
x 100
QTHEO.
PUMP EFFICIENCYMECHANICAL IN PERCENT
MECHANICAL EFFICIENCY
(%) =
THEORETICAL TORQUE TO DRIVE
x 100
ACTUAL TORQUE TO DRIVE
EffMECH =
TTHEO.
x 100
TACT.
PUMP DISPLACEMENTIN CUBIC INCHES/REVOLUTION
DISPLACEMENT =
FLOW RATE(GPM) x 231
PUMP RPM
PUMP TORQUEIN INCH POUNDS
TORQUE =
HORSEPOWER x 63025
RPM
PUMP TORQUEIN INCH POUNDS
TORQUE =
PRESSURE(PSIG) x PUMP DISPLACEMENT(CIPR)
2 x 3.14
PUMP LIFE B10 BEARING LIFE
B10 HOURS OF
BEARING LIFE
=
RATED LIFE HOURS
x
RATED SPEED(RPM)
x
(RATED PRESSURE(PSIG) )3
NEW SPEED(RPM)
(NEW PRESSURE(PSIG) )3
B10
=
RATED HRS.
x
RPMr
x
(P r)3
RPMn
(P n)3
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