Control Valve Sizing Calculator
Cv from flow rate, pressure drop, and fluid properties.
Inputs
Results
Calculated Cv
44.72
Selected standard Cv
46
Oversize ratio1.03
Valve authority (N)0.5
Authority rating (0-2)2
Valve rangeability50
Min controllable flow (GPM)2
Port velocity (ft/s)8.9
Valve Type NameGlobe
How to Use This Calculator
- Enter Design flow (GPM), Valve pressure drop (psi), and Coil/circuit drop (psi).
- Set Specific gravity, Valve Type, and Globe (50:1 rangeability).
- Adjust Ball (200:1 rangeability), Butterfly (25:1, large flows) as needed.
- Review Calculated Cv and Selected standard Cv.
- Use Oversize ratio and Valve authority (N) to inform your decision.
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