What is the primary purpose of the low water cutoff in a boiler system?

The primary purpose of the low water cutoff in a boiler system is to prevent overheating of the boiler. This device is designed to measure the water level within the boiler and automatically shut down the burner or heating element if the water level falls below a certain point. When the water drops too low, it can result in dangerous overheating and damage to the boiler components, such as the heat exchanger or even boiler failure. By ensuring that there is always an adequate water level, the low water cutoff helps to maintain the safe operation of the boiler, protecting both the equipment and the overall system integrity.

Maintaining steam pressure, conserving water, and maintaining fuel flow are important considerations in boiler operation, but they are secondary functions compared to the critical role of the low water cutoff in ensuring safety and preventing overheating.