What is the primary function of a blowoff valve?

The primary function of a blowoff valve is to remove sediment and sludge that may accumulate in the boiler. Over time, impurities in the water, such as minerals and sediments, can settle at the bottom of the boiler. If not addressed, these deposits can lead to issues such as reduced efficiency, overheating, or even damage to the boiler. The blowoff valve allows for periodic drainage of this accumulated material, helping to maintain the operational efficiency and safety of the boiler system.

By regularly using the blowoff valve, operators ensure that the water chemistry remains balanced and that any contaminants are effectively flushed out. This maintenance practice is crucial for prolonging the life of the boiler and ensuring its safe operation. The other options listed involve functions that are managed using different controls or systems within the boiler operation but are not directly related to the blowoff valve's role.