Weir SPM QWS 2500 XL, Инструкция по эксплуатации и руководство по обслуживанию, Страница: 8 / 44

8 of 44
Document P/N: 2P137414
Release Date: 05/29/2017
Revision: IR

To calculate the maximum possible pressure at a given rod load when the RL rating and plunger
diameter are known:
RL = PSI
PD x PD x .7854

To calculate the flow in gal/rev or GPM when the plunger diameter, stroke length, and number of
cylinders is known:
PD x PD x .7854 x SL x NC = GPR
231
GPR x RPM
= GPM

To calculate the fluid flow velocity through a pipe or hose when the GPM and pipe size are known:
Pipe I.D. x Pipe I.D. x .7854 = Internal Area = A
GPM x .3208
= Flow Velocity (FV)
A

To calculate the size pipe of hose required to maintain a specified flow velocity when the GPM and
desired flow velocity are known:
GPM x .3208 = Internal Area Required
FV

To calculate the maximum allowable GPM through a specified hose or pipe at a specified flow velocity
when the internal area of the pipe and the desired flow velocity are known:
FV x A = Max GPM
.3208

To calculate pinion shaft or driveline torque when the input BHP and pinion shaft RPM are known:
BHP x 5252 = Torque
Pinion Shaft RPM
Conversion Factors:
Multiply: By: To Obtain:
Barrels (U.S.) 42 Gallons (U.S.)
Gallons (U.S.) .023809 Barrels (U.S.)
Gallons (U.S.) 231 Cubic Inches
Cubic Inches .004329 Gallons (U.S.)
Cu. Ft./Sec. 448.831 GPM
GPM .002228 Cu. Ft./Sec.
Head Feet (water) .4331 PSI
PSI 2.309 Head Feet (water)
Kilowatts 1.341 Horsepower
Horsepower .7457 Kilowatts