55B46DVF00A0000000

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; Fluorocarbon Elastomer (FKM) Actuator Diaphragm, Pilot Seat, And Pallet Diaphragm; 36.1" - 41.7" wc Pressure Spring Range With Air Assist; Opt-A: Internal Sensing With Pilot Exhaust To Atmosphere, Backflow Preventer, And Manual Blowdown Valve