Mercer Valve P/N 91-35G11T34C1, Series 9100, Connections 1-1/2"600#RF x 2"150#RF, Orifice G, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 1480, Top Closed, Service Gas, PSIG Setting Range 1201-1480, Soft Seat Safety Relief Valve