Pulsation Dampener Calculator

Calculate the required capacity for a pulsation dampener to prevent pipe hammer and reduce friction losses in your discharge line.

Information Necessary for Sizing

Variables: V=Volume per pump stroke in cubic inches
K=Type of pump (K factor)
P=Mean operating pressure
D=Allowable pressure fluctuations as a percentage. Plus and Minus from Mean
n=Polytropic exponent of gas expansion. (Nitrogen=0.714, Air=1.0)

V) Volume Per Stroke Calculations:

1. Gallons Per Minute/Strokes Per Minute = Gallons Per Stroke
    Gallons Per Stroke x 231 Cubic Inches Per Gallon = Cubic Inch Per Stroke

      OR

2. .7854 X (Inch Bore Diameter); x Inch Stroke Length = Cubic Inch Per Stroke

K) Type of Pump: (K Factor)
               Simplex: Single Acting = .60 | Double Acting = .25
               Duplex: Single Acting = .25 | Double Acting = .15
               Triplex: Single Acting = .13 | Double Acting = .06
               Quadruplex: Single Acting = .10 | Double Acting = .06
               Quintuplex: Single Acting = .06 | Double Acting = .02
P) Operating Pressure (Mean):  P
Desired Pressure Fluctuations:     

Minimum Pressure    Pmin   =    P-(PxD)  |    Maximum Pressure    Pmax  =    P+(PxD)

FORMULA:
V x K ( P / Pmin )n =     Cubic Inch Capacity Required
-------------------------
1 - ( P / Pmax )n