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Title: Fundamental Principles Of Pilot-Operated Regulators
Author: Bob Bennett
Source: 1999 Appalachian Gas Measurement Short Course
Year Published: 1999
Abstract: A regulator is a mechanism for controlling or governing the movement of machines or the flow of liquids and gases, in order to meet a standard. Our consideration today will be with the gas regulator, specifically the pilot controlled regulator, in matching the supply of gas moving through it with the demand downstream. Regulators operate on the following equation SUPPLY DEMAND. The regulator solves this equation by maintaining the outlet pressure at the set point. Too much supply causes an increase in downstream pressure while too little supply results in a decrease in downstream pressure. Graphically, the ideal regulator would operate as follows:

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