Two-piece ball valves feature a main body with a single threaded end connection and a lever. They are also available with a bolt and flange connection assembly, as well as with larger port sizes.
Like 1-piece ball valves, 2-piece ball valves are not designed to be repaired, since removing them once they are screwed in can cause galling on the threads (wear due to adhesion). Furthermore, the NPT connection is designed to be screwed in once and properly torqued to create a metal-to-metal seal within the valve body. Unscrewing this connection disrupts this seal and is not recommended.
Two-piece ball valves provide bidirectional flow shutoff and are available in full port configurations for applications where flow rate is critical. They are compact, reliable and economical, if slightly more expensive to replace than 1-piece ball valves.
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