2. COMPONENTS OF CONTROL VALVES
Valve Body Valve Trim Actuator
Positioner
Position
Feedback
Bonnet and
Packing
3. VALVE BODY
This is the main structure of the
valve through which the fluid flows. It
contains the inlet and outlet ports.
4. VALVE TRIM
The trim consists of internal
components like the valve plug, seat,
and other parts that control the flow of
fluid through the valve. It's designed to
regulate the flow rate and pressure.
5. ACTUATOR
The actuator is responsible for
moving the valve trim to adjust
the flow of fluid. It can be
pneumatic, hydraulic, or electric,
depending on the application.
6. POSITIONER
There's a positioner attached to the actuator.
It ensures that the valve is opening or
closing to the exact position required for the
desired flow rate.
7. POSITION FEEDBACK
This component provides feedback
to the control system about the
current position of the valve. It helps
in maintaining precise control over
the process.
8. BONNET
AND
PACKING
The bonnet covers the valve body and
provides a seal to prevent leakage.
Packing, usually made of materials
like PTFE, surrounds the valve stem
to prevent fluid from leaking out
around the stem.
