NIBCO, MB612AF, F51TB-E, Ball Valve - Flanged, Tru-Bloc® True Union, Corzan® CPVC Schedule 80, EPDM, 3"The Chemtrol® Tru-Bloc® True Union ball valve is engineered with a self-adjusting seat and upstream and downstream blocking capability to stop flow when an alternate union is removed for servicing the piping system. The valve's injection molded CPVC construction with EPDM O-ring is ideal for use in systems for hot corrosive liquids, hot and cold water distribution, chemical processing, industrial plating, deionized water lines, chemical drainage, waste water treatment systems, and similar applications above the temperature range of PVC.The original Chemtrol® True Union design allows the valve and operational components to be conveniently lifted from the piping system for repair or replacement. Tru-Bloc® advances the True Union concept with the self-adjusting energizer O-ring. The valve can be easily joined with the flanged end connections. Corzan® CPVC Schedule 80 thermoplastics demonstrate excellent mechanical strength over broad temperature range, outstanding underground performance and superior hydraulics. Chemtrol Corzan® CPVC valves are lightweight, easy to install, maintenance-free and will not rust, scale, pit or corrode. Choose Chemtrol® valves for the most reliable, versatile and economical valve option in commercial and industrial applications.Features:Valve pressure rating 150 psi at 73°F water non-shock full-portMaximum service temperature 210°FFull portTrue Bloc® designEPDM O-ringsFlanged end connections compatible with ANSI B16.5 Class 150Orange handleDo not use or test with compressed air or other gasesASTM F1970NSF/ANSI Standard 14NSF/ANSI Standard 61, Annex G.