Cv Factor For Valves. In a situation of special travel and differential pressure 1 lbf/in2. Flow coefficients cv values the flow coefficiency (cv) of a valve is the rate of gallons per minute of water at 60° f through a fully opened valve at a pressure drop of 1 psi across the valve.
A valve cv can be described as the number of gallons per minute (gpm) at 60 o f (15.5 o c) that will pass through a valve with an associated pressure drop of 1 psi. It can be assumed that the tests are done with water (unless otherwise noted), using a specific gravity of 1.0, 1.2 centistoke viscosity, and a standard temperature of 60 degrees fahrenheit. Cv factor can be calculated as following formula.
Cv factor is using generally, it is expressed factor for fluid 60°f that flow into valve by us gal/min.
The use of this flow coefficient (c v) calculator leads to a standard calculation to compare valve capacities. This is used as a guide and is not a linear progression. The required cv range for this application than is.0141 to.0703. In a situation of special travel and differential pressure 1 lbf/in2.
