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
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K) Type of Pump: (K Factor)
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Simplex:
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Single Acting = .60 | Double Acting = .25
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Duplex:
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Single Acting = .25 | Double Acting = .15
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Triplex:
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Single Acting = .13 | Double Acting = .06
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Quadruplex:
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Single Acting = .10 | Double Acting = .06
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Quintuplex:
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Single Acting = .06 | Double Acting = .02
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P) Operating Pressure (Mean): P
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Desired Pressure Fluctuations:
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Minimum Pressure Pmin = P-(PxD) | Maximum Pressure Pmax = P+(PxD)
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FORMULA:
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V x K ( P / Pmin )n = Cubic Inch Capacity Required
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1 - ( P / Pmax )n
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