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Control valves are valves used within industrial plants and elsewhere to control operating conditions such as temperature, pressure, flow, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a "setpoint" to a "process variable" whose value is provided by sensors that monitor changes in such conditions.
Additional recommended knowledge
The opening or closing of control valves is done by means of electrical, hydraulic or pneumatic systems.
Types of control valve bodies
The different types of control control valve bodies may be categorized as shown below:
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Control_valves". A list of authors is available in Wikipedia.|