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Title: Regulator Selection And Sizing
Author: John m. Kruse
Source: 1982 Appalachian Gas Measurement Short Course
Year Published: 1982
Abstract: Prior to discussing the application and selection of a regulation device, lets first define a Pressure Regulator. A Pressure Regulator is an automatic device which controls the media flow and maintains a desired media pressure while reducing the media supply pressure. The basic regulation device to perform its design function consists of three basic elements. First is the restrictive element which can be a single, double, or multi ported variable opening. Second is the responsive element by which a throttling device is activated. The responsive element usually takes the form of a flexible diaphragm however, it can be a piston or other device which can readily respond to pressure changes. The third element of the Pressure Regulator is the standard. This is the element to which the controlled pressure is referred. It opposes the force exerted by the pressure being controlled. Any change in the balance of these forces results in a movement of the responsive element or diaphragm which in turn affects the movement of the throttling device. The standard also can be of several forms. The type standard utilized will depend on the application and the desired performance. These basically can be spring, pressure or weight type - either direct or by lever. The latter type is basically becoming obsolete.

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