Model "1000LP" Pressure Reducing Regulator,Tfe/Al-Silicate Gaskets; 1/2" Size,Gaseous Jet; Wcb Body & Spring Chamber; Sb Trim: 316SST Cylinder & Plug, Buna-N (Nbr) Seat, Buna-N (Nbr);Diaphragm; Opt-30: 150 Lb Raised Face Flanges; 1-5 PSIG Range Spring; Opt-12: One-Step Reduced Orifice