MSI Hybrid Quintuplex, Technical Manual, Page: 81 / 88

Appendix A TYPICAL PUMP FORMULAS
LEGEND:

A = Area (square inches)

AR = Area Required (square inches)

BHP = Brake Horse Power

FR = Flow Rate (gallons per minute)

FRM = Flow Rate Max (gallons per minute)

FV = Flow Velocity (feet per second)

GPR = Gallons (US) Per Revolution

HHP = Hydraulic Horse Power

ID = Inside Diameter (inches)

ME = Mechanical Efficiency

NC = Number of Cylinders

PD = Plunger Diameter (inches)

PSI = Pounds per Square Inch

RL = Rod Load (pounds force)

RPM = Revolutions Per Minute

SL = Stroke Length (inches)

T = Torque (foot-pounds force)
a.
To calculate the HHP output when the rate and pressure are known:
HHP
PSI x FR

1714
b. To calculate the BHP input recommended when the rate, pressure, and mechanical efficiency are know:
 
BHP
ME x
PSI x FR

1714
c. To calculate the maximum possible pressure when the BHP, rate, and ME are known:
 
PSI
FR
ME x x BHP

1714
d. To calculate the maximum possible rate when the BHP, PSI, and ME are known:
 
FR
PSI
ME x x BHP

1714
e. To calculate rod load when the fluid end plunger diameter and pressure are known:
RL PSI x x PD x PD

7854 . 0
Revision K 03/12/2019 MSI - A Division of Dixie Iron Works, Ltd. All rights reserved. Page 78