Why is a steam boiler blown off intermittently?

Blowing off a steam boiler intermittently is primarily done to discharge sediment and scale-forming matter from the boiler. Over time, the process of boiling water produces steam that can leave behind minerals and impurities. These substances accumulate and can lead to a range of issues such as reduced efficiency, increased wear, and potentially dangerous conditions if left unmanaged.

By blowing down the boiler, operators remove this sediment and prevent the buildup of scale, thereby maintaining the integrity of the boiler and ensuring that it operates efficiently and safely. This practice is a critical component of boiler maintenance, helping to prolong the life of the equipment and maintain optimal performance.