HY28-2668-01/GC/NA,EU
GOLD CUP
®
Series - Application Manual
Piston Pumps & Motors
6.1
Parker Hannifin Corporation
Hydraulic Pump Division
Marysville, Ohio USA
Section 6
CONVERSION FACTORS
DEFINITION & UNIT
displacement
in
3
/rev x 16.387 = cm
3
/rev cm
3
/rev x 0.06102 = in
3
/rev
flow
gpm x 3.78 = L/min
L/min x 0.2642 = gpm
power
hp x 0.7457 = kW
kW x 1.341 = hp
torque
lb-ft x 1.3567 = Nm
Nm x 0.7376 = lb-ft
pressure
lbs/in
2
(psi) x 0.06895 = bar
bar x 14.50 = lbs/in
2
(psi)
lbs/in
2
(psi) x 6.895 = kPa
kPa x 0.1450 = lbs/in
2
(psi)
weight
lb x 0.4536 = kg
kg x 2.205 = lbs
force
lb x 4.448 = N
N x 0.2248 = lbs
volume
in3 x 16.387 = cm
3
cm3 x 0.06102 = in
3
area
in2 x 6.452 = cm
2
cm2 x 0.1550 = in
2
length
in x 25.4 = mm
mm x 0.03937 = in
temperature
degree F-32 = °C
1.8 x C+32 = °F
1.8
viscosity
cSt x 1.0 = mm
2
/sec mm
2
/sec x 1.0 = cSt
SSU = cSt x 4.25 + 14
20 cSt = 99 SSU
FLUID POWER FORMULAS
Pump input torque
lbs. in.
pressure(psi) x displacement (in
3
/rev)
2
x mech. eff.
Pump input power
hp
rpm x (in
3
/rev) x (psi)
395934 x overall eff.
Pump output flow
U.S. gpm
rpm x (in
3
/rev) x volumetric eff.
231
Fluid motor speed
rpm
231 x flow rate(U.S. gpm) x volumetric eff.
displacement
(in
3
/rev)
Fluid motor torque
lbs. in.
pressure(psi) x displacement (in
3
/rev) x mech. eff.
2
Fluid motor power
hp
rpm x (in
3
/rev) x (psi) x overall eff.
395934
(metric)
Pump input torque
Nm
pressure(bar) x displacement (cm
3
/rev)
20
x mech. eff.
Pump input power
kW
rpm x (cm
3
/rev) x (bar)
600000 x overall eff.
Pump output flow
Lpm
rpm x (cm
3
/rev) x volumetric eff.
1000
Fluid motor speed
rpm(min
-1
) (tr/mn)
1000 x flow rate (Lpm) x volumetric eff.
displacement
(cm
3
/rev)
Fluid motor torque
Nm
pressure(bar) x displacement (cm
3
/rev) x mech. eff.
20
Fluid motor power
kW
rpm x (cm
3
/rev) x (bar) x overall eff.
600000
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