Cv Flow Calculator: Precision Tool for Valve Sizing and Fluid Dynamics

Calculate Your Valve Flow Coefficient (Cv)

U.S. Gallons per Minute (GPM)
Unitless (e.g., 1 for water, 0.8 for oil)
Pounds per Square Inch (psi)

Master fluid dynamics with our advanced Cv Flow Calculator. Precisely determine the valve flow coefficient (Cv) for both liquids and gases. This essential tool helps engineers and designers optimize valve sizing, predict flow rates, and manage pressure drop for efficient system design.

Formula:

For Liquids: Cv = Q × √(SG / ΔP)
For Gases (Subcritical Flow): Cv = QSCFH / (1360 × √((ΔP × P1) / (SG × T)))

Where:

  • Cv: Flow Coefficient (dimensionless)
  • Q: Volumetric Flow Rate (U.S. GPM for liquids, SCFH for gases)
  • SG: Specific Gravity of the fluid (unitless, water = 1, air = 1)
  • ΔP: Pressure Drop across the valve (P1 - P2) (psi)
  • P1: Inlet Absolute Pressure (psia, for gases)
  • T: Absolute Temperature at inlet (°Rankine = °F + 460, for gases)

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