5200 Series Rev C Pilot Operated Pressure/Vacuum Relief Vent With Pipe Away; 2" Inlet Size; 2" Outlet Size, Mates With Standard ASME 150# Flanged Connections; Raised Face Carbon Steel Body & Cover, SST Seat Ring; 41.8" - 86.0" Wc Pressure Spring Range; Fluorocarbon Elastomer (Fkm) Actuator Diaphragm, Fluorocarbon;Elastomer (Fkm) Pilot Seat And Pallet Diaphragms; Std. Weight Loaded 0.5 Oz/In2 - 0.5 PSIG Vacuum Range; Standard: Internal Sensing, SST Pilot - Exhaust To Main Valve Outlet,;With Backflow Preventer; Bird Screen (Std)