Control valve pdf

Final Control Elements (FCE):

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The common energy source of final control elements are:

• Electric

• Hydraulic

• Pneumatic

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Electric :

• Electric Heater, Thyristor Bridge 

• Solenoid

• Stepping Motor

• DC Motor

• AC Motor

Control Valve

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• The control valve manipulates a flowing fluid, such as gas, steam, water, or chemical compounds, to compensate the disturbance occurs in the process and keep the process variable as close as possible to the desired set point.

• A “control valve” regulates the flow of fluid through a pipe in response to the signal from a loop controller or logic device.

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