though the manual stem configuration is typically used in dedicated liquid or suction lines

Is this heat exchanger compatible with high-efficiency 90%+ AFUE furnaces

including flame sensing and high-limit switch oversight

including the 30RBA and 30RBC series

Heil Quaker ICP 1175853 Valve 321894-708 though the manual stem configurationThe Heil Quaker ICP 1175853 Valve is an OEM 2 stage gas valve designed for high efficiency heating systems. Operating on a 24V control circuit, this component features a 3 4" inlet and 1 2" outlet configuration, engineered to manage gas flow with precision across low and high fire stages. It is factory set for 3. 2" WC but is adjustable to meet specific manifold pressure requirements for Natural Gas or Liquid Propane (LP) with a proper conversion kit.