Conversions

Common Conversions

1 Bar = 14.5 PSI
25.4mm = 1 Inch
1 HP = 42.4 BTU/Min
1 US Gallon Oil = 7.08 lbs
1 GPM at 1500 PSI = 1 H.P. (General Rule)
1 US Gallon = 231 Cubic Inches = 3.7854 Litres

 Application Formulae HP = GPM x PSI1714 x Pump Efficiency PSI = 1714 x Pump Efficiency x HP GPM GPM = 1714 x Pump Efficiency x HP PSI HP = Torque (in.lbs) x RPM 63025 Torque = HP x 63025 RPM RPM = HP x 63025 Torque

 Electric Motors At 440V a 3 Phase Motor Draws 1.25 AMP/HP At 220V a 3 Phase Motor Draws 2.5 AMP/HP At 110V a Single Phase Motor Draws 10 AMP/HP

Other Conversions

eg to convert Atmospheres to Bar : Multiply Atmospheres by the Factor (1.01325) = Bar
to convert Bar to Atmospheres : Divide Bar by the Factor (1.01325) = Atmospheres
 Unit Symbol Unit Symbol Factor Atmospheres Atm bar bar 1.01325 BTU/hour Btu/h kilowatts kW 0.293071 x 103 Cubic centimetres cm3 litres I 0.001 Cubic centimetres cm3 millilitres ml 1 Cubic feet ft3 cubic metres m3 0.0283168 Cubic feet ft3 litres I 28.3161 Cubic inches in3 cubic centimetres cm3 16.3871 Cubic inches in3 litres I 0.0163866 Degrees (angle) 0 radians rad 0.0174533 Feet ft metres m 0.3048 Feet of water ft H2O bar bar 0.0298907 Fluid ounces UK UK fl oz cubic centimetres cm3 28.413 Fluid ounces US US fl oz cubic centimetres cm3 29.5735 Foot pounds f. fl Ibf joules J 1.35582 Foot pounds/minute ft Ibf/min watts W 81.3492 Gallons, UK UK gal litres l 4.54596 Gallons, US US gal litres l 3.78531 Horsepower hp kilowatts kW 0.7457 Inches of mercury in Hg millibar mbar 33.8639 Inches of water in H20 millibar mbar 2.49089 Inches in centimetres cm 2.54 Inches in millimetres mm 25.4 Kilogramme force Kgf newtons N 9.80665 Kilogramme f. metre Kgfm newton metres Nm 9.80665 Kilogramme f./sq. centimetre Kgf/cm2 bar bar 0.980665 Kilopascals kPa bar bar 0.01 Metric horsepower* * kilowatts kW 0.735499 Microinches uin microns um 0.0254 Millimetres of mercury mm Hg millibar mbar 1.33322 Millimetres of water mm H20 millibar mbar 0.09806 Newtons/square centimetre N/cm2 bar bar 0.1 Newtons/square metre N/m2 bar bar 10-3 Pascals (newtons/sq metre) Pa bar bar 10-3 Pints, UK UK pt litres l 0.568245 Pints, US US pt litres l 0.473163 Pounds (mass) lb kilogrammes Kg 0.4536 Pounds/cubic foot lb/ft3 kilogrammes/cubic metre Kg/m 16.0185 Pounds/cubic inch lb/in3 kilogrammes/cubic centimetre Kg/cm3 0.0276799 Pounds force lbf newtons N 4.44822 Pounds f. feet lbf ft newton metres Nm 1.35582 Pounds f. inches lbf in newton metres Nm 0.112985 Pounds f./square inch lbf/in2 bar bar 0.06894 Revolutions/minute r/min radians/second rad/s 0.10472 Square feet ft2 square metres m2 0.092903 Square inches in2 square metres m2 6.4516 x 10-2 Square inches in2 square centimetres cm2 6.4516