Formulas - Parker Hannifin
2008-3-16 · Circumference = 3.14 x Diameter Foot Pound = Inch Pound 12 Inch Pound = Foot Pound x 12 Motor Speed: ... 25 fps All oil lines in air-over-oil system - 4 fps fps = feet per second ... P = Working pressure in PSI with a 4:1 Design Factor t = Wall thickness, in inches S = Allowable stress (12,500 with a 4:1 Design Factor) D = Outside diameter ...
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