5200 Series Rev D Pilot Operated Pressure/Vacuum Relief Vent With Pipe Away; Mates With ASME 150 Flange Connection; 10" Inlet Size; 12" Outlet Size; Carbon Steel Body, 316 Stainless Steel Bolt-In Seat Ring; FEP Actuator Diaphragm, FFKM1 Pilot Seat, FEP Pallet Diaphragms; 2.1" - 12.0" Wc Pressure Spring Range; 0.50 - 0.74 Oz/In2 Vacuum Pallet Configuration; Stainless Steel Weight Material; Standard: Internal Sensing, Pilot Exhaust To Main Valve Outlet With Backflow Preventer; Standard Vacuum Protection Screen