MODEL 1049 PILOT OPERATED VENT VALVE STAINLESS STEEL BODY; 2" INLET X 3" OUTLET ASME CLASS 150# RF FLANGES; FFKM 1 SOFT SEATS; OPTION 8: WITH INTERNAL SENSING, SST PILOT FILTER ELEMENT, PILOT EXHAUST TUBED TO MAIN VALVE OUTLET, WITH BACKFLOW PREVENTER TO PREVENT BACKFLOW THROUGH MAIN VALVE AND PILOT, WITH FIELD TEST CONNECTIONS, AND ROTOMETER TO PURGE PILOT SENSE AND DISCHARGE LINES; VITON (FKM) ACTUATOR DIAPHRAGM WITH TEFLON LINERS; 3.2 - 14.0 PSIG; REV LEVEL A;