Description
The Weil McLain 383-700-407 Venturi Valve Assembly ECO/WM97+70 is an original equipment component of a condensing boiler, a high-efficiency unit in HVAC systems. It is fitted in the gas-air mixing section, where it regulates and balances the flow of fuel gas, and combustion air before ignition. This section has a pressure difference that maintains adequate, combustion ratios that are stable and efficient. This assembly collaborates with the gas valve and blower system to control the flow of fuel, and assist in the safe operation of the burner, stable ignition, and regulated heat production in the heating system.









