Valve Pressure Differential for Liquid

on . 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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Tags: Pressure Differential Valve Sizing