Mercer Valve P/N 91-46H11T82U1, Series 9100, Connections 2"150#RF x 2-1/2"150#RF, Orifice H, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 285, Top Closed, Service Gas, PSIG Setting Range 221-285, Soft Seat Safety Relief Valve