Model DL Rev B Pressure Reducing Regulator For General Service; 1-1/2" Line Size; Stainless Steel Body And Spring Chamber; S4N Trim: 416 Stainless Steel With BUNA-N (NBR) Seat And Neoprene (BC) Diaphragm; Mates With ASME 150 Flanged End Connections (14" Face To Face Dimension); 70-150 PSIG Range Spring; Polyethylene Vented Spring Chamber Plug