Mercer Valve P/N 91-55H11T80U1, Series 9100, Connections 1-1/2"150#RF x 3"150#RF, Orifice H, Seat Teflon, Inlet and Body Carbon Steel, PSIG Pressure Limit 285, Top Closed, Service Gas, PSIG Setting Range 141-220, Soft Seat Safety Relief Valve