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Title: INTRODUCTION TO REGULATOR AND RELIEF VALVE SIZING
Author: MARK DYKOFF
Source: 2019 Western Gas Measurement Short Course
Year Published: 2019
Abstract: Regulators used in natural gas applications are devices made up of a valve and actuator, in combination, that use the motive force generated by an imbalance between the process pressure and a loading element to throttle a valve, maintaining the process pressure at a set value under varying demand. Throughout this paper the term regulator will be used for any device that is sensing and controlling a downstream pressure (P2) and a relief valve is any device sensing an upstream pressure (P1), particularly with the intent of providing overpressure protection. Both devices operate under the same principles however the application of each device is unique. Well start with an introduction to the principles of operation and sizing of regulators and the discussion of relief valves will follow.

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