The Heatco WR36H27MOD3-4 3/4" Natural Gas Valve is a modulating gas valve designed to regulate natural gas flow in Heatco gas-fired HVAC heating equipment. It uses a 0–10 VDC control signal to adjust gas flow according to the system’s heating demand, helping maintain consistent burner operation and temperature control. This valve is suitable for Heatco furnaces, heaters, and related g... https://www.partshnc.com/heatco-wr36h27mod3-4-3-4-natural-gas-valve-36h-mod-0-10-vcd