![]() ![]() Swirl plate problems occur for several reasons, but mostly swirl plate failure is the result of exhaust gas recirculation. ![]() The air/gas mixture is then “swirled” around together and drawn into the opening in the plate and on to the blower. The blower at the same time draws air into the swirl plate openings which are on the circumference of the plate. The swirl plate is open to the atmosphere at the gas valve outlet as our valves are negative pressure valves that only emit gas with the presence of blower “vacuum” drawing on the valve. Swirl plates are plastic, are different colors, are round like a “plate” and have fins and orifice openings of different sizes. The swirl plate adds turbulence, mixing the gas and air to provide a blended mix to the blower. ![]() Swirl plates provide a vortexed air flow supply to the gas coming out of the gas valve outlet. It is found in most cases attached to the outlet plate of the gas valve and sandwiched in between the gas valve and the blower (inducer) housing. The majority of our units use the Swirl Plate. They are present in most, but not all, gas burning units. Swirl Plates are a staple in the design of high efficiency boilers and water heaters. Understanding the Swirl Plate in your Boiler or Water Heater
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