| Cylinder Pressure (PSI)
= Force (pounds)/Area (sq. Inch) |
PSI = F/A |
| Cylinder Area
(sq. inch) = 3.1416 x Radius Squared |
A = 3.1416 x R(sq.) |
|
Cylinder Force (pounds) = Pressure (PSI) x Area (sq. inch) |
F = P x A |
| Cylinder Speed
(ft./sec.) V = (231 x gpm) / (12 x 60 x Area) |
V = (0.3208 x
GPM) / A |
| Cylinder
Volume, Gallons (Vol) = (Area x Stroke in inches) / 231 |
Vol. = (A x
Stroke) / 231 |
| Fluid Motor
Torque (in. lbs.) T = Pressure (psi) x disp. (cu. in. /
rev.) / 6.2822 |
T = (PSI x
disp.) / 6.2822 |
| Fluid Motor
Speed (RPM) = (231 x GPM) / disp. (cu. in.) |
RPM = (231 x GPM)
/ disp. |
| Fluid Motor
Horsepower = Torque (in. lbs.) x RPM / 63025 |
HP = T x RPM /
63025 |
| Pump Output
Flow (GPM) = ((RPM) x disp. (cu. in.)) / 231 |
GPM = RPM /
disp./231 |
| Pump Input
Horsepower = GPM x Pressure (psi) / 1714 x eff. |
HP = (Q x P) /
1714 x E |
| Pump Input
Torque (T) = (GPM x PSI x 3.06) / RPM /eff |
T = (GPM x PSI x
3.06) / RPM / eff |
| Pump
Displacement Cu. In. (Disp.) = GPM x 231) / RPM /eff |
Disp. = (GPM x
231) / RPM / eff |
| Pump Input
Speed ( RPM) = (GPM x 231) / Disp. / eff |
RPM = (GPM x
231) / Disp. / eff |
| Pump
Efficiency (eff) = Actual Flow (GPM) / Theoretical Flow
(GPM) |
eff = Actual GPM
/ Ther GPM |
| Pump Flow
with PTO Drive (GPM) = (Engine RPM x % PTO x Disp. x eff)
/ 231 |
GPM = (Eng. RPM
x % PTO x Disp. x eff) / 231 |
| Velocity of
Oil Flow in Pipe (Vel) = GPM x 0.3208 / Area |
Vel = (GPM x
0.3208) / Area |
|
Recommended Maximum Oil Velocity in Hydraulic Lines, FPS = Feet
per Second |
Pump Suction: 2-4 FPS
Pressure Lines to 3000 PSI: 15-20 FPS
Pressure Lines over 3000 PSI: 25 FPS |
