Mercer Valve P/N 91-35F11T09U1, 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 101-180, Soft Seat Safety Relief Valve