What is the purpose of a blowdown in boiler maintenance?

The purpose of a blowdown in boiler maintenance is primarily to remove impurities and maintain water quality. Over time, solids and other contaminants can accumulate in the boiler water, which can lead to issues like scaling, corrosion, and the formation of sludge. By performing a blowdown, a portion of the water containing these impurities is expelled from the boiler. This action helps in regaining the quality of the boiler water, ensuring that it remains within safe and effective operational parameters. Maintaining water quality is crucial for the efficient and safe operation of the boiler, as it directly affects the performance and longevity of the boiler system.