While every effort has been made to ensure the accuracy of this information, errors can occur. Note : This information is provided as a quick reference resource and is not intended to serve as a substitute for qualified engineering assistance. 128 ounces liquid / 133.37 ounces weight.Circumference (ins) = π x d where π (pi) = 3.1416 and d = diameter in inches.Circumference (ins) = 2 x π x r where π (pi) = 3.1416 and r is radius in inches.Area (sq ins) = π x d² / 4 where π (pi) = 3.1416 and d = diameter in inches.Area (sq ins) = π x r² where π (pi) = 3.1416 and r = radius in inches squared.Velocity of oil flow in a pipe: velocity (ft/sec) = flow (gpm) x. 4 ft/sec = any oil lines in air-over-oil systems.25 ft/sec = pressure lines over 3,000 psi.
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15 to 20 ft/sec = pressure lines 500 – 3,000 psi.10 to 15 ft/sec = pressure lines up to 500 psi.Guidelines for flow velocity in hydraulic lines: Wattage to heat hydraulic oil: each 1 watt will raise the temperature of 1 gallon of oil by 1☏ per hour Water compressibility: 1/3 % approximate volume reduction for every 1,000 psi of pressure Oil compressibility: 1/2 % approximate volume reduction for every 1,000 psi of pressure Reservoir capacity (GALS) = length (INS) x width (INS) x height (INS) / 231
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Horsepower when idling a pump: an idle and unloaded pump will require about 5% of its full rate hp General Information and “Rules of Thumb” :Įstimating pump drive horsepower: 1 hp of input drive for each 1 gpm at 1,500 psi pump output TD = temperature difference of the oil in the reservoir and the surrounding ambient airĪ = entire surface area of the reservoir in square feet (including the bottom if elevated)
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General cooling capacity of a steel reservoir: HP (heat) =.
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(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: