Document P/N: 2P136539
Release Date: 05/25/2017
Revision: F
7 of 42
Useful Pump Data Formulas:
Definition of Symbols Used:
A
- Area (sq. in.)
BHP
- Brake horsepower
BPM
- Barrels per minute (U.S.)
FV
- Flow velocity (feet per second)
GPM
- Gallons per minute (U.S.)
GPR
- Gallons per revolution (U.S.)
HHP -
Hydraulic
horsepower
ID
- Inside diameter (inches)
ME -
Mechanical
efficiency
NC
- Number of cylinders (per pump)
PD
- Plunger diameter (inches)
PSI
- Pounds Per Square Inch
RL
- Rod load (pounds)
RPM
- Crankshaft revolutions per minute
SL
- Stroke length (inches)
T
- Torque (foot pounds)
Pump Data Formulas:
To calculate the HHP output when the volume and pressure are known:
GPM x PSI
=
HHP
1714
To calculate the BHP input required when the volume, pressure, and mechanical efficiency are known:
GPM x PSI
=
BHP
(1714 x ME)
To calculate the maximum possible pressure when the BHP, flow, and ME are known:
BHP x (1714 x ME)
=
PSI
GPM
To calculate the maximum possible flow when the BHP, PSI, and ME are known:
BHP x (1714 x ME)
=
GPM
PSI
To calculate rod load when the plunger diameter and pressure are known:
PD x PD x .7854 x PSI =
RL
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
SECTION I
:
GENERAL INFORMATION
