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Title: Selection Of Control Valves And Assocuted Instruments
Author: Dannie Mercer
Source: 1991 International School of Hydrocarbon Measurement
Year Published: 1991
Abstract: A control valve is used to control fluid flow (I.e. gas or liquid) based on the process demands. Control valves are used in the gas Industry primarily as a throttling device to control pressure and flow rates. They are also used for On/Off service such as meter tube switching or for liquid level control. A control valve system consists three maj or components, a valve body assembly, an actuator, and a controller. Proper sizing and selection of each component is essential for the control valve system to provide satisfactory process control and minimize future operational and maintenance expenses.

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