Mercer Valve P/N 91-34F11T61U1, Series 9100, Connections 1-1/2"300#RF x 2"150#RF, Orifice F, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 740, Top Closed, Service Gas, PSIG Setting Range 301-480, Soft Seat Safety Relief Valve