Describe the role of a blow-off valve in a boiler.

The role of a blow-off valve in a boiler is primarily to remove accumulated sediment and impurities from the boiler. Over time, minerals and debris can settle at the bottom of the boiler, which can lead to a buildup that may affect efficiency and safety. The blow-off valve facilitates the discharge of this sediment and sludge, ensuring that the boiler operates efficiently and safely.

By allowing for periodic removal of these impurities, the blow-off valve helps maintain water quality in the boiler. This, in turn, contributes to better heat transfer and minimizes the risk of overheating or other operational issues that could arise from sediment buildup. Regular blow-off procedures are essential for the longevity and reliability of the boiler system, ensuring it runs effectively and reduces the likelihood of costly repairs or system failures.