Control valave type and working principle

Question

Accepted Answer

Control valves are used to regulate the flow of fluids in a process system.

Control valves can be classified into different types such as globe valves, butterfly valves, ball valves, and plug valves.
The working principle of control valves involves the use of a valve body, actuator, and positioner.
The valve body contains a flow passage that can be opened or closed to control the flow of fluid.
The actuator is responsible for moving the valve stem to open or close the valve.
The positioner ensures that the valve is in the desired position based on the control signal received.
Control valves can operate in different control modes such as on-off control, throttling control, and pressure control.
For example, a globe valve is commonly used for throttling control, while a ball valve is often used for on-off control.
The selection of control valve type depends on factors such as the nature of the fluid, flow rate, pressure, and temperature.

Accepted Answer

Air to open control valva ,air to close control valve, control valve is final control alimint wich use flow control alimint

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