Cv Meaning Control Valve. No kv is 86.5% of cv, 100% cv is the maximum the valve will pass, we used to size for valve operation around 70%, now the norm is more like 40% requiring much larger safeties (if) the control valve is the limiting basis. It is commonly understood that nearly every pneumatic device creates a flow restriction in the system.
In automatic control terminology, a control valve is termed a final control element. What does cv stand for? 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 is applied across the valve:
Do you mean the definition for cv with respect to a valve's capacity.
The cv tells you how to properly size your valve so it has minimal effect on the hydraulic efficiency you’ve engineered into your system. When gas, instead of liquid flows through this valve does the cv remains same. Cv by definition is the number of gallons per minute (gpm) a valve will flow with a 1 psi pressure drop across the valve. The valve flow coefficient cv or its metric equivalent kv has been adopted universally as a comparative value for measuring the capacity of control valves.