5100 Series Rev D Pilot Operated Pressure/Vacuum Relief Vent End-Of-Line; Mates With ASME 150 Flange Connection; 8" Inlet Size; Carbon Steel Body, 316 Stainless Steel Bolt-In Seat Ring; FEP Actuator And Pallet Diaphragms, FFKM 1 Pilot Seat; 3.2 - 15.0 psi Pressure Spring Range; Spring Loaded, >1.25 PSIG Vacuum Spring Range; Epoxy Coated Carbon Steel Weight Material; Standard: Internal Sensing,Pilot Exhaust To Atmosphere With Backflow Preventer; Standard Vacuum Protection Screen