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A ball valve serves the purpose of shutting off fluid flow in a piping system by employing a quarter turn operation. This operation is facilitated by a ball-shaped element with a central hole, connected to a handwheel through a shaft. This article delves into the distinctions between 3-piece and 2-piece ball valve constructions.
What is a 3-Piece Ball Valve? A 3-piece ball valve comprises three main body parts – the main body and two connectors. These connectors are designed to fit into the main body through threads or welding, allowing for easy removal of the main body for repair or cleaning. Components like ball seats, ball, and stem can be replaced independently after valve installation. Noteworthy advantages include robust construction, in-line repair capability, and protected seats guarding against fluid damage.
Figure: Three-piece ball valve
Advantages of 3-piece Ball Valves:
What is a 2-Piece Ball Valve? A 2-piece ball valve consists of two separate body pieces connected through threads or a flange and bolt assembly. These valves find widespread use due to their versatility in fluid control applications. The valve has one body and one end connection, with the end connection fitting into the body. Installation of the threaded version is tool-free, but repair necessitates valve removal.
Figure: Two-piece ball valve
Advantages of 2-piece Ball Valves:
Factors to Consider When Selecting a 3-Piece or 2-Piece Ball Valve:
This comparison aids in making an informed decision based on specific operational needs and requirements.