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Valve flow

Cv Flow Coefficient Calculator

Calculate flow rate, valve Cv value, or pressure drop using the relationship between flow coefficient, pressure drop, and specific gravity.

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Valve flow

Run the calculation

Calculate flow rate, valve Cv value, or pressure drop using the relationship between flow coefficient, pressure drop, and specific gravity.

Engineering inputsCv Flow Calculator

Enter the known application values. Outputs update instantly as units or assumptions change.

Calculation mode
Use these values for preliminary sizing before final datasheet review.

Engineering visual

Cv Flow Calculator calculation map

Upstream pressure drives flow through the valve restriction to downstream pressure. The restriction and pressure drop are shown at the component where they occur.

Cv Flow Calculator calculation mapUpstream pressure drives flow through the valve restriction to downstream pressure. The restriction and pressure drop are shown at the component where they occur.UPSTREAM p₁DOWNSTREAM p₂VALVE / ORIFICEFLOW QΔp = p₁ − p₂
  1. 01Calculation mode
  2. 02Calculate and compare
  3. 03Flow rate
Primary result
Flow rate Q
Cv value
Pressure drop

Calculation reference

What this tool checks.

Use this as a practical comparison tool. Confirm final valve sizing against manufacturer flow curves and operating conditions.

Inputs

  • Calculation mode
  • Cv value
  • Flow rate
  • Pressure drop
  • Specific gravity

Outputs

  • Flow rate
  • Cv value
  • Pressure drop
  • Kv equivalent

Engineering guide

Use the result with the right context.

Calculate cv flow calculator from application data and interpret the result for preliminary pneumatic engineering review.

Calculation workflow

  1. Enter the known application values, including Calculation mode, Cv value, Flow rate.

  2. Run the calculation using one consistent set of units and reference conditions.

  3. Review Flow rate, Cv value, Pressure drop, then compare the result with the component datasheet and application margin.

Assumptions and limits

  • Treat catalog flow coefficients and conductance values as component-specific data measured under stated reference conditions.

  • Validate tubing, fittings, silencers, manifolds, temperature, and simultaneous demand as part of the complete flow path.

FAQ

Common review questions.

01Tool noteWhat does Cv mean for a pneumatic valve?

Cv is a flow coefficient that helps compare how much flow a valve can pass under a given pressure drop.

02Tool noteCan I use Cv alone to select a solenoid valve?

Cv is useful, but final selection should also check port size, voltage, response, pressure range, seal material, media, and duty cycle.

03Tool noteWhat should I verify after using the Cv Flow Calculator?

Check the entered units and reference conditions, then compare the calculated outputs with manufacturer ratings, application safety margins, transient loads, installation losses, and measured machine performance.