Valve Flow Coefficient for Liquid

Written by Jerry Ratzlaff on 13 February 2019. Posted in Fluid Dynamics

Valve Flow Coefficient for Liquid Formulas
\(\large{ C_v = Q \sqrt {\frac {\Delta p} {SG} } }\) (US units) \(\large{ K_v = Q \sqrt {\frac {\Delta p} {SG} } }\) (SI units)
Symbol	English	Metric
\(\large{ C_v }\) = valve flow coefficient (US units)	\(\large{ dimensionless }\)
\(\large{ K_v }\) = valve flow coefficient (SI units)	\(\large{ dimensionless }\)
\(\large{ SG }\) = specific gravity of liquid (water at 60°F = 1.0000)	\(\large{ dimensionless }\)
\(\large{ Q }\) = valve flow rate	\(\large{\frac{ft^3}{sec}}\)	\(\large{\frac{m^3}{s}}\)
\(\large{ \Delta p }\) = valve pressure differential	\(\large{\frac{lbf}{in^2}}\)	\(\large{Pa}\)

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Valve Flow Coefficient for Liquid Formulas