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; ...