Cv Calculator — Valve Flow Coefficient
Calculate Q (gpm) from given Cv, ΔP (psi), and SG.
How to Use This Calculator
- Enter the valve coefficient Cv.
- Enter ΔP in psi and SG.
- Click Calculate to get Q in gpm.
Formula
Q = Cv · √(ΔP / SG)
For liquid sizing at standard conditions; ensure Q uses gpm and ΔP uses psi.
Frequently Asked Questions
Is Cv dimensionless?
Cv is a coefficient defined via specific unit convention (gpm/psi), often treated as dimensionless in context.
What about viscosity?
High viscosity can reduce effective flow; advanced sizing may include correction factors.