Model 1049 Rev A Pilot Operated Vent Valve; Stainless Steel Body; 2" Inlet X 3" Outlet, Mates With ASME 150 Flanged End Connections; FFKM 2 Soft Seats; Option 7: With Internal Sensing And Pilot Exhaust Tubed To Main Valve Outlet, With Rotometer To Purge Pilot Sense And Discharge Lines; Teflon Actuator Diaphragm; 41.8" - 86.0" wc Pressure Range