540BSC09C05000000

5400 Series Rev C Pilot Operated Pressure Relief Vent End-Of-Line; 12" Inlet Size, Mates With Standard ASME 150 Flanged Connection; Raised Face Stainless Steel Body, Cover, And Seat Ring; 41.8" - 86.0" Wc Pressure Spring Range; FEP Actuator Diaphragm, FFKM 1 Pilot Seals And Seat; Opt-5: Internal Sensing, Pilot Exhaust To Atmosphere With Backflow Preventer And Field Test Connection