MSI Hybrid Triplex - Appendix Atypical Pump Formulas

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
PSIxFR

1714
b. To calculate the BHP input recommended when the rate, pressure, and mechanical efficiency are know:
 
BHP
MEx
PSIxFR

1714
c. To calculate the maximum possible pressure when the BHP, rate, and ME are known:
 
PSI
FR
MExxBHP

1714
d. To calculate the maximum possible rate when the BHP, PSI, and ME are known:
 
FR
PSI
MExxBHP

1714
e. To calculate rod load when the fluid end plunger diameter and pressure are known:
RLPSIxxPDxPD 7854.0
Revision K 03/12/2019
MSI - A Division of Dixie Iron Works, Ltd. All rights reserved.
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