Cv Value Gas Valve. The flow coefficient, cv, is a dimensionless value that relates to a valve’s flow capacity. The formula will differ depending on the product the valve regulates, such as liquid, gas, or steam.
It is commonly understood that nearly every pneumatic device creates a flow restriction in the system. Cv for fluids cv for liquids is the volume of 68°f water in u.s. C v calculator for valve sizing.
Please contact us if the fluid specification requires viscosity correction.
Is valid the same relation or the constant is different ??. If the pressure downstream of the valve is lower than a critical value, the flow through the valve will be choked. C v calculator for valve sizing. Cv value is an imperial measure of flow in us gallons per minute of water at 60° fahrenheit with a pressure drop of 1 psi across the valve.