Thermoplastic PVDF Kynar 740 body pressure regulator, [ 1/2" through 3"] with connections for [Asahi or GF] BCF piping system. Valve to have a one piece body housing containing the inlet port, outlet port, valve seat, and pressure sensing orifice. Regulator is to have a piston with a metal-ion free EPDM rolling diaphragm sensing the downstream pressure and providing for maximum sensitivity and control accuracy. Valve is a shut-off design with a metal-ion free EPDM seat and redundant metal-ion free EPDM u-cups sealing the upper chamber on a pressure balanced shaft. All components are to receive pre-assembly DI cleaning. All units are to be [pre-set to ____PSI,] 100% individually tested at the factory, followed by 8 hour hot/8 hour cold DI rinse, and final multi-stage cleaning with DI water and Triton X100 @ 1%, 18 megohm DI rinse, nitrogen purge, blacklight inspection, and double bagging in 6 mil heat-sealed polyethylene. As manufactured by Plast-O-Matic Valves, Inc., Cedar Grove, NJ USA.