Mercer Valve P/N 91-35F11T23U1, Series 9100, Connections 1-1/2"600#RF x 2"150#RF, Orifice F, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 1480, Top Closed, Service Gas, PSIG Setting Range 1001-1450, Soft Seat Safety Relief Valve