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Title: Ball Valve Regulations
Author: G. R. Ytzen
Source: 1966 Appalachian Gas Measurement Short Course
Year Published: 1966
Abstract: The consideration of a ball valve for throttling control must involve an analysis of features of conslruclion. dynamic forces, flow characteristics and limitations of application. In considering the basic construction features of ball valves in general, we find the ball or plug supported in one of two ways: (1) rigidly by the use of bearings on each end of a shaft attached to the ball or (2) cradled between the sealing members with some allowance for a small amount of movement.

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