Choked flow in control valves is a subject of serious concern for industrial users. The term is usually associated with destructive process conditions that can damage valve internals or expose ...

They control flow by both restricting and bypassing, permitting full use of both regulated and bypass flow. Flow through a controlled orifice produces a pressure that shifts a compensating spool.

Figure 3. Typical inherent control valve flow characteristics. Figure 4. Installed control valve characteristic for a 0.5 vpdd. The three control valve characteristics are: Linear; Modified parabolic; ...

In this method, attributed to F.C. Yu, the control valve in a pumped application is assigned a minimum pressure drop at maximum design flow rate and maximum 80% control valve open position ...

1. Flow-to-open cutaway. Control valves equipped with noise-abatement trim, such as a drilled-hole cage or a tortuous path stack, are typically oriented in the flow-to-open direction.