Types Of Control Valve.

#Control valve has 3 basic Components:

01. Actuator Most actuators are pneumatic. Usually, an actuator works with the help of a diaphragm and instrument air. This is the device that positions the throttling element (i.e., the valve plug inside the valve body).

02. Valve body subassembly This is the part where the valve plug, valve seats, and valve casing are located.

03. Accessories These include positioners, I/P (current- to-pressure) transducers, and position sensors. 

#2 types of control valves are based on their motion:-

01. Linear-Motion valves as- A- Gate Valves.

                                                 B- Diaphragm Valves.

                                                 C- Globe Valves.

02. Rotary Motion valves as- A- Butterfly Valves. 

                                                 B- Ball Valves.

                                                 C- Plug Valves.

#The Control Valve Actuator accepts a signal from an external source and, in response, positions (opens or closes) the valve to the position required or designed. Control Valve actuators enable remote operation of control valves.

#Actuators can be moved into position by either: 

01. Hydraulic signal,

02. Air/Gas signals or,

03. Electric signals.

#Typical control valve position commands include:

01. More Closed,

02. More Open,

03. Fully closed and

04. Fully Open.

#According to the power supply required 3 Types of CVs:-

1️⃣ Pneumatic valve actuators.

2️⃣ Electric valve actuators.

3️⃣ Hydraulic valve actuators.