52AK5DV61000000000

5200 Series Rev D Pilot Operated Pressure/Vacuum Relief Vent With Pipe Away; Mates With ASME 150 Flange Connection; 4" Inlet Size; 6" Outlet Size; Carbon Steel Body, 316 Stainless Steel Bolt-In Seat Ring; Fluorocarbon Elastomer (FKM) Actuator Diaphragm, Pilot Seat, And Pallet Diaphragms; 12.1" - 18.0" wc Pressure Spring Range; MIN - 0.49 Oz/In2 Weight Loaded Vacuum Pallet Configuration; Epoxy Coated Carbon Steel Weight Material; Standard: Internal Sensing With Pilot Exhaust To Main Valve Outlet And Backflow Preventer; Standard Vacuum Protection Screen