52AL6DF82S00000000-337

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; PTFE Pilot Seat With FEP Actuator And Pallet Diaphragms; 36.1" - 41.7" wc Pressure Spring Range; 0.50 - 0.74 Oz/In2 Weight Loaded Vacuum Pallet Configuration; Stainless Steel Weight Material; Standard: Internal Sensing With Pilot Exhaust To Main Valve Outlet And Backflow Preventer; Standard Vacuum Protection Screen; Special For Cryogenic Service