Pump Speed (rpm) = 231 x pump flow rate (gpm) / pump displacement (cu ins/rev) Pump Outlet Flow (gpm) = pump speed (rpm) x pump displacement (cu ins/rev) / 231 Motor Displacement (cu ins/rev) = torque (in lbs) x 6.28 / pressure (psi) Motor Flow Rate (gpm) = motor speed (rpm) x motor displacement (cu ins/rev) / 231 Motor Horsepower (hp) = torque (in lbs) x motor speed (rpm) / 63,025 Motor Speed (rpm) = 231 x flow rate (gpm) / motor displacement (cu ins/rev) (Can also use horsepower (hp) x 63,025 / speed (rpm) Motor Torque (in lbs) = pressure (psi) x motor displacement (cu ins/rev) / 6.28 26 / flow rate (gpm)Ĭylinder Flow Rate (gpm) = 12 x 60 x cylinder speed (ft/sec) x area (in²) / 231Ĭylinder Volume Capacity (gals) = cylinder area (in²) x cylinder stroke (ins) / 231 (Divide by 60 to convert speed to ft/sec)Ĭylinder Speed (in/min) = flow rate (cu ins/min) / area (in²)Ĭylinder Time (secs) = area (in²) x cylinder stroke (ins) x. Piston Rod End (annulus end) Area (in²) = piston cylinder area (in²) - rod area (in²)Ĭylinder Force (lbs) = pressure (psi) x area (in²)Ĭylinder Speed (ft/min) = 19.25 x flow rate (gpm) / area (in²) (Can also use 3.1416 x radius squared (ins) ) Piston Cylinder Area (in²) = diameter squared x. Speed (rpm) = horsepower (hp) x 5,252 / torque (ft lbs) Horsepower (hp) = torque (ft lbs) x speed (rpm) / 5,252 Torque (ft lbs) = horsepower (hp) x 5,252 / speed (rpm) Pressure (psi) = force (lbs) / area (in²)įorce (lbs) = area (in²) x pressure (psi)Īrea (in²) = force (lbs) / pressure (psi)įluid Power Horsepower (hp) = pressure (psi) x pump flow (gpm) / 1,714 Pressure, Force and Horsepower Relationships:
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