Model HP Rev A Pressure Reducing Regulator With Graphite/NBR Gaskets; 1/2" Line Size; Stainless Steel Body With Stainless Steel Spring Chamber; S36 Trim: 316 Stainless Steel With PTFE Seat, 302 Stainless Steel Diaphragm; OPT-30: Mates With ASME 600 Raised Face Flanges; 180-325 PSIG Range Spring