What is the role of a high-temperature limit switch in a boiler?

The high-temperature limit switch plays a crucial safety role in a boiler system by shutting down the boiler when it exceeds safe temperature limits. This functionality is essential to prevent potentially dangerous situations such as overheating, which can lead to equipment damage, safety hazards, or even catastrophic failures. The switch monitors the temperature within the boiler and, upon detecting that it has surpassed a predetermined threshold, triggers the shutdown process to safeguard the entire system. This ensures that operating conditions remain within safe parameters, protecting both the boiler and its operators.

In contrast, controlling the feedwater supply, monitoring steam production, or adjusting the fuel mix are functions that pertain to the overall operating efficiency and performance of the boiler, but they do not directly relate to the critical safety aspect that the high-temperature limit switch addresses.