Mercer Valve P/N 91-06D51T60I1, Series 9100, Connections 1/2"MNPT x 1"FNPT, Orifice D, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 1480, Top Closed, Service Gas, PSIG Setting Range 751-1300, Soft Seat Safety Relief Valve