Mercer Valve P/N 91-34G11T63U1, Series 9100, Connections 1-1/2"300#RF x 2"150#RF, Orifice G, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 740, Top Closed, Service Gas, PSIG Setting Range 301-420, Soft Seat Safety Relief Valve