What is the purpose of blow-off valves in a boiler?

The purpose of blow-off valves in a boiler is to remove sediment and impurities that accumulate in the boiler over time. As water is heated and turned into steam, minerals and other contaminants can concentrate and settle at the bottom of the boiler. If these impurities are not periodically expelled, they can hinder the boiler's efficiency and performance, potentially leading to issues like corrosion, scale buildup, or even boiler failure.

By using blow-off valves, operators can effectively manage the quality of the water in the boiler. The process involves opening the blow-off valve to allow a controlled release of boiler water, which helps eliminate the sediments and impurities that have gathered. This action not only maintains the integrity of the boiler system but also contributes to its safe and efficient operation. Hence, the correct understanding of blow-off valves centers around their crucial role in ensuring the cleanliness and operational reliability of the boiler.