Define Cv and explain how valve sizing affects control performance.

Define Cv and explain how valve sizing affects control performance.

• A. Cv is the valve flow coefficient, the flow rate through a valve at a given pressure drop; larger Cv means more flow capacity; incorrect Cv leads to sluggish response, overshoot, or instability.
• B. Cv stands for Constant Velocity and has no effect on flow.
• C. Cv is the cable voltage; larger Cv improves signal integrity.
• D. Cv is a communication protocol.

Answer: (A)