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Control Valve Sizing Calculator

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Input Parameters

Unit System

Results

Control Valve Sizing

22
Flow Coefficient (Cv)
1-1/2"
Recommended Valve Size
5
Pressure Drop in WG
20
Flow Velocity ft/s

Calculation Steps

1

Calculate Pressure Drop

Formula:
ΔP=Pinlet−Poutlet\Delta P = P_{inlet} - P_{outlet}
Calculation:
ΔP=50.0−45.0\Delta P = 50.0 - 45.0
Result:
5.0 psi5.0 \text{ psi}
2

Calculate Flow Coefficient (Cv)

Formula:
Cv=QSGΔPC_v = Q \sqrt{\frac{SG}{\Delta P}}
Calculation:
Cv=50.001.005.0C_v = 50.00 \sqrt{\frac{1.00}{5.0}}
Result:
22.36 22.36 \text{ }
3

Determine Valve Size

Formula:
BasedonCvandvalvesizingtablesBased on Cv and valve sizing tables
Calculation:
Cv=22.36C_v = 22.36
Result:
1−1/2" 1-1/2" \text{ }