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Title: Selection Of Control Valves And Associated Instrumentation
Author: Phillip Murdock
Source: 1986 International School of Hydrocarbon Measurement
Year Published: 1986
Abstract: A control valve is a device placed in a fluid stream, gas or liquid, to control fluid flow based on demand. Control valves a trol pressure an A control valve fluid to be deli rate based on fl are an applicati throttling servi re used as a restriction to cond/ or volumetric flow of a fluid. used in throttling service allows vered at a controlled or throttled uid demand. Pressure regulators on of control valves used in ce. In off/on service, a control valve is either fully open or fully closed. Examples of off/on service are a control valve used for meter tube switching or for liquid level control. A control valve system consists of a control valve body, an actuator, and a controller. Proper sizing and selection of each component is essential for a control valve system to provide desired process control, minimize initial cost, and minimize operation and maintenance expense.

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