Valve Pressure Differential for Liquid

on 13 February 2019. Posted in Fluid Dynamics

Valve Pressure Differential for Liquid Formulas
\( \Delta P = SG \; ( Q \;/\; C_v ) \) (English units) \( \Delta P = SG \; ( Q \;/\; K_v ) \) (Metric units)
Symbol	English	Metric
\( \Delta P \) = valve pressure differential	\(lbf \;/\; in^2\)	\(Pa\)
\( C_v \) = valve flow coefficient	\( dimensionless \)
\( K_v \) = valve flow coefficient	\( dimensionless \)
\( Q \) = valve flow rate	\(ft^3 \;/\; sec\)	\(m^3 \;/\; s\)
\( SG \) = specific gravity of liquid (water at 60°F = 1.0000)	\(dimensionless \)

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