Hydraulic Cylinder Piston Velocity Equation


The speed at which the piston rod of a hydraulic cylinder moves is based on the following equation:

Ve = 231 Q/Ap

Where:

Ve = Extension rate of piston rod
231 = Constant (cubic inches in a gallon)
Q = Flowrate of the pressurized fluid (gpm)
Ap = Area of the piston (in2)

Area of piston equation

Ap = pi Dp2 / 4

Where:

Ap = Piston area
pi = 3.14157
Dp = Diameter of piston
4 = Numercal constant

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