Mercer Valve P/N 91-48H11T84U1, Series 9100, Connections 2"600#RF x 2-1/2"150#RF, Orifice H, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 1480, Top Closed, Service Gas, PSIG Setting Range 451-700, Soft Seat Safety Relief Valve