The ball valve is the standard in plastic piping systems, though it should be used only for clean, on/off service. A plastic ball with a hole through it rides in a "seat" of PTFE or polyethylene. This seat can be damaged by particles caught when the valve is closed or opened. True union means that the carrier or main part of the valve can be removed from the piping system and either repaired or replaced. Configurations for ball valves include single union, true union, and compact. Actuation is available for true union valves. Precautions should be taken using ball valves with suspended particles, high-velocity, and modulation.
Title: What is a ball valve?
Description: description of a ball valve.
Published: 5/27/2003
Last Edited: 1/20/2023
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