Valve Types and Characteristics

The control valve regulates the rate of fluid flow as the position of the valve plug or disk is changed by force from the actuator. To do this, the valve must:
Contain the fluid without external leakage. Have adequate capacity for the intended
service.
Be capable of withstanding the erosive,
corrosive, and temperature influences of the process.
Incorporate appropriate end connections to mate with adjacent pipelines and actuator
attachment means to permit transmission of actuator thrust to the valve plug stem or rotary
shaft. build site
Many styles of control valve bodies have been developed. Some can be used effectively in a
number of applications while others meet specific service demands or conditions and are used less frequently. The subsequent text describes popular
control valve body styles utilized today.