52AL6DC33S60000000

5200 Series Rev D Pilot Operated Pressure/Vacuum Relief Vent With Pipe Away; Mates With ASME 150 Flange Connection; 6" Inlet Size; 8" Outlet Size; 316 Stainless Steel Body, 316 Stainless Steel Bolt-In Seat Ring; FEP Actuator And Pallet Diaphragms, FFKM1 Pilot Seat; 2.1" - 12.0" wc Pressure Spring Range; 0.75 - 7.99 Oz/In2 Weight Loaded Vacuum Pallet Configuration; Stainless Steel Weight Material; Opt-6: Internal Sensing With Pilot Exhaust To Main Valve Outlet, Backflow Preventer, And Rotometer To Purge Pilot Sense And Discharge Lines; Standard Vacuum Protection Screen