Pneumatic Valve Sizing Calculator
Calculate required valve Cv/Kv flow coefficient for pneumatic systems with sub-critical and critical (choked) flow analysis.
Inputs
%
Results
Selected valve Cv
0.1
Calculated Cv (exact)0.02
Cv with safety factor0.03
Required Kv (metric)0.02
Selected valve max flow (SCFM)85.7
Flow regime (1=subsonic, 2=choked)1
Equivalent orifice (in)0.08
Suggested port size (NPT in)0.13
Kv With Safety0.03
How to Use This Calculator
- Enter Required flow (SCFM), Inlet pressure (PSIG), and Outlet pressure (PSIG).
- Set Air temperature (°F), Gas specific gravity, and Sizing safety factor.
- Review the Selected valve Cv result.
- Use Calculated Cv (exact) and Cv with safety factor to inform your decision.
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