Model PGR-1 Pilot Operated Pressure Reducing Gas Regulator; 3" Line Size; WCB Steel Body And Cover Dome; SA Trim: 316L Stainless Steel Trim, Neoprene Seat, Neoprene Diaphragm, PTFE Static Seal, Neoprene O-Ring Dynamic Seal, Neoprene Pilot Ball (For 90-200 PSIG Spring Range 316 Stainless Steel Ball) And Diaphragm; ASME 300 Raised Face Flanged End Connections; 90 - 200 PSIG Range Spring; Self Contained Sensing, Stainless Steel Fittings And Tubing