Model DL Rev B Pressure Reducing Regulator For General Service; 2" Line Size; Carbon Steel Body And Spring Chamber; S40V Trim: 316 Stainless Steel With Fluorocarbon Elastomer (FKM) Seat And Diaphragm; Mates With ASME 300 Flanged End Connections (14" Face To Face Dimension); 10-40 PSIG Range Spring; Opt-25S: Stainless Steel Vented Spring Chamber Plug