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Title: Application & Operation Of Ball Valve Regulators
Author: H. Vernon Reaves
Source: 1967 Gulf Coast Measurement Short Course (Now called ASGMT)
Year Published: 1967
Abstract: Valve regulators in the Gas Industry have been in use for many years. Most of them consist of a lubricated plug valve, valve actuator, positioner and pressure controller. The output from the pressure controller is fed to the positioner which controls the actuator or driving muscle for the valve. The sensing signal for the pressure controller is tapped Into the downstream system of the valve regulator. The first valve regulators came into existence when someone got the Idea of installing an actuator and positioner on an existing block valve. This furnished some amount of regulation and control. Due to the rectangular porting of the valve these valve regulators had poor low flow characteristics. Also in the throttling position the lubricant grooves were exposed to the gas stream which resulted In the lubricant being washed out and winding up downstream on the orifice plate.

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