Model PGR-1 Pilot Operated Pressure Reducing Gas Regulator; 2" Line Size; Stainless Steel Body And Cover Dome; SB Trim: 316L Stainless Steel Trim, BUNA-N Seat, BUNA-N Diaphragm, PTFE Static Seal, BUNA-N O-Ring Dynamic Seal, BUNA-N 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; External Sensing, Stainless Steel Fittings And Tubing; OPT-25S: Screen For Spring Chamber Vent