55B46DD30000000000

5500 Series Rev D Pilot Operated Pressure Relief Vent With Pipe Away; Mates With PN16 Flange Connection; 4" Inlet Size; 4" Outlet Size; 316 Stainless Steel Body And Bolt-In Seat Ring; FDA Approved BUNA-N Pilot Seal with FDA Approved FEP Actuator And Pallet Diaphragms; 2.1" - 12.0" wc Pressure Spring Range; Standard: Internal Sensing With Pilot Exhaust To Main Valve Outlet And Backflow Preventer