Model SA1 Rev D Ultra High Purity Pressure Reducing Regulator; 1" Line Size; Stainless Steel Body With Stainless Steel Spring Chamber; 316L Stainless Steel Trim, 17-7PH Stainless Steel Diaphragm, PTFE Seat, Stainless Steel/PTFE U-Cup Static Seal, Stainless Steel/PTFE U-Cup Dynamic Seal, FFKM O-Ring Diaphragm Seal; Butt Weld Tube End Connections; 30-150 PSIG Range Spring; Internal Sensing, 2-5 PSIG Lower Spring; OPT-1: Closing Cap; High Purity Electro Polish To 10Ra Finish, Cleaned For Ultra High Purity Service To Cashco Specification S-1662