Model 8310LP Rev D Pressure Reducing Regulator, Graphite/NBR Gaskets; 1-1/2" Line Size; Carbon Steel Body With Carbon Steel Spring Chamber; S5 Trim: 316 Stainless Steel Metal Seat, Fluorocarbon Elastomer Diaphragm; OPT-30: Mates With ASME 150 Raised Face Flanges; 3-10 PSIG Range Spring