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Brochures / Catalogues

Tube / Piping services

Hydraulics

Filtration

Pumps

Seals

Hydraulic pump formulae

Actual pump delivery (lpm) = volumetric efficiency (max of 100%) x displacement per revolution (lpm) x pump speed (rpm)

Pump input power (kW) =  pressure (bar) x flow (lpm)/ 600 x efficiency (%)

Conversion factors

LENGTH

Multiply
ByTo obtain
inch25.4millimetres (mm)
inch0.0254metres (m)
foot0.3048metres (m)
yards0.9144metres (m)
mile1.61kilometres (km)

MASS (WEIGHT)

MultiplyByTo obtain
ounce28.35grams (gms)
pound0.454kilograms (kg)
ton (long) 2240 lbs1,016.05kilograms (kg)
ton (short)2000 lbs907.18kilograms (kg)
tonne1,000kilograms (kg)

VOLUME

MultiplyByTo obtain
gallon (Imp.)4.55litres (l)
gallon (US)3.785litres (l)
cubic inch16.38cubic centimetres (cm3)
cubic inch16.38millilitres (ml)
cubic foot0.0283cubic metres (m3)
cubic foot28.3litres (l)

PRESSURE

Multiply ByTo obtain
lbs/sq.in. (psi)0.069bar
lbs/sq.in. (psi)6.9kiloPascals (kPa)
atmosphere (atm)1.013bar
kg/sq.cm98.1kiloPascals (kPa)
bar100kiloPascals (kPa)
megaPascal (MPa)10bar
inch mercury (Hg)3.387kiloPascals (kPa)
foot water (H2O)2.99kiloPascals (kPa)

POWER & TORQUE

MultiplyByTo obtain
horsepower (hp)0.7457kilowatts (kW)
foot lbs (lbf/ft)1.356Newton metres (Nm)
inch lbs (lbf/in)0.113Newton metres (Nm)

FLOW

Multiply ByTo obtain
gal/min (Imp)4.55litres / min (lpm)
gal/min (US)3.785litres / min (lpm)
std.cu.ft./min (air)0.472litres / sec (l/sec