What does the term "dry firing" mean?

The term "dry firing" refers to the operation of a boiler without sufficient water, which can lead to significant and potentially catastrophic damage. When a boiler is run without adequate water, the heat generated can cause the heat exchanger or boiler components to overheat, leading to thermal expansion, warping, or even failure of the metal components. This condition can also result in the formation of steam that cannot be properly controlled, putting the entire system at risk.

Understanding this concept is crucial for anyone involved in boiler operation and maintenance because ensuring that a boiler has an appropriate water level is one of the fundamental safety checks that operators must conduct. Proper water levels help maintain the intended operation and longevity of the boiler, avoiding the costly consequences associated with dry firing.