Model 1049 Rev A Pilot Operated Vent Valve; Stainless Steel Body; 2" Inlet X 3" Outlet Mates With ASME 150 Flanged End Connections; Fluorocarbon Elastomer (FKM) Soft Seats; Standard Configuration With Internal Sensing And Pilot Exhaust To Atmosphere; Fluorocarbon Elastomer (FKM) Actuator Diaphragm; 3.2 - 14.0 psi Pressure Range