Valve Cv Formula Gas. Because the fluid is a gas and δp ≥ p1 / 2 so we will use the formula. The flow coefficient of a device is a relative measure of its efficiency at allowing fluid flow.
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However, the calculated cv of the fluid will change depending on the process conditions. Control valve tips and tricks. As a gas or vapor compresses with changes in pressure, its density changes correspondingly.
How do convert cv to cg ?
Gallons per minute of water at 60°f that will flow through a control valve at a specified opening when a pressure differential of 1psi. The valve flow coefficient, cv, is the number of u.s. Than 1/2 p1, use 1/3 p1, for p2 in formula. A 2 valve has a cv of 120 at 40%.
