Valve Cv/Kv Flow

Compute liquid flow rate and Kv conversion from valve Cv, specific gravity, and pressure drop.

visual calculatorInternal Flow & Losses

Read the flow shape before trusting the number.

This page turns a CFD setup into regime, scale, and dominant-effect cues. Adjust the calculator below and compare the moving graphic with the computed result.

input scale

model

check

valveCvKvflow rate

formula

KaTeX rendered

\begin{aligned}\text{Q\_gpm = C\_v sqrt(Delta p\_psi / SG)}\\[0.35em]\text{K\_v \~{}= 0.865 C\_v}\end{aligned}

ASCII source

Q_gpm = C_v sqrt(Delta p_psi / SG), K_v ~= 0.865 C_v

C_vspecific gravityDelta p (psi)

Q (gpm)

37.9473

Q (m^3/s)

0.0024

K_v

10.3800

Delta p (Pa)

6.895e+4

Liquid sizing relation: Q_gpm = C_v sqrt(Delta p / SG). Cavitation and flashing need separate checks.

valve Cv Kv flow rate