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Title: Obtaining Performance Prom Regulators
Author: L. S. Stabler
Source: 1938 Southwestern Gas Measurement Short Course (Now called ISHM)
Year Published: 1938
Abstract: Successful regulator operation depends not only on physical characteristics of the various parts comprising the regulator but also on certain external factors that influence its reactions and the resulting performance. As large a downstream storage volume as possible is desirable in that it permits the regulator to overrun without sever fluctuation in the controlled pressure. Under conditions of limited downstream capacity and rapid varying loads, appreciable changes in controlled pressure are possible which are conductive to a pulsating regulator. To be considered with downstream pressure tap. If it is too near the discharge side of the regulator, varying flows may produce dynamic effects creating a false pressure that is transmitted to the diaphragm on the other hand, if the tap is located too far from the regulator the pressure drop through the pope and intervening fittings, varying approximately as the square of the flow, may result in a cycling controlled condition. Closely related to the location of the pressure tap is the debatable question of its size which it is believed tends to be larger than necessary in a great many cases. Further mention of this fact will be made later in the paper.

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