Formula and Inputs
Required Cv is calculated from flow, fluid specific gravity, and available pressure drop using standard valve sizing relationships.
VoltCheck24 Engineering Calculator
Control Valve Cv and Kv Sizing Calculator
Estimate required control valve Cv or Kv, fluid velocity, pressure drop, and nominal valve size for industrial process systems.
How to use this calculator
- Collect the values below from the equipment nameplate, data sheet, or field measurement.
- Enter values using one consistent unit system and use worst-case operating conditions.
- Review the result, margin, and engineering note before selecting hardware.
- Cross-check the result with the related calculator and save the review for your project record.
Input checklist
- Fluid and specific gravity
- Normal and maximum flow
- Available pressure drop
- Temperature and phase condition
Industrial Use Cases
Use this page for water, oil, compressed air, steam, and process control valve preliminary sizing.
Engineering Note
Final selection requires cavitation, flashing, choked-flow, noise, actuator force, trim characteristic, and manufacturer sizing verification.
FAQ
Is a larger Cv always better?
No. An oversized valve can operate near its seat and lose controllability. Select a practical operating range around the normal flow point.
What is the difference between Cv and Kv?
Cv is commonly expressed in US flow units while Kv uses metric flow conventions; the calculator provides the selected basis.
Preliminary engineering reference only. Confirm final selections against current standards, project specifications, and manufacturer data.