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The following are hydraulic motor related equations for determining horsepower and related engineering design data.
To determine a pumps horsepower use the following
equation.
Equation:
Where:
P = Power, hp
Q = Flow Rate, gpm
S = Specific Gravity of fluid
H = Head height, ft
= Efficiency
coefficient
Horsepower Required to Drive Hydraulic Pump
HP = GPM X PSI X .0007 (this is a 'ruleofthumb' calculation)
Where:
GPM = Gallonsper Minute
PSI = Pounds per Square Inch
.0007 = Rule of Thumb Constant for Power
HP = Horse Power
#2 Horsepower required to Drive a Hydraulic Pump
P HP = q p / 1714
where
HP = horsepower (HP) q = required pump capacity (gpm) p = required pressure (psi)
