What are the three basic parts of a Control Valve?

Actuator

Bonnet

valve body

val body

spool/piston

handle

Actuator, Stem coupling, Valve body

1) Valve actuator - which moves the valve's modulating element, such as ball or butterfly.

2) Valve positioner - Which ensures the valve has reached the desired degree of opening. This overcomes the problems of friction and wear.

3) Valve body - in which the modulating element, a plug, globe, ball or butterfly, is contained.

1.ACTUATOR

2.BONET

3.BODY.