Converts a valve’s CV (Flow Coefficient) to GPM (Gallons Per Minute), you would need to provide inputs for the CV value and the pressure drop across the valve (ΔP) in PSI (pounds per square inch), as the basic formula to convert CV to GPM under specific conditions is:
where:
CV is the valve’s flow coefficient,
ΔP is the pressure drop across the valve in PSI,
SG is the specific gravity of the fluid (for water, SG=1).
Below is a simple CV to GPM calculator, assuming the fluid is water (SG=1), thus simplifying the formula to: