What is the primary function of a gauge glass on a boiler?

The primary function of a gauge glass on a boiler is to display the water level inside the boiler. This is essential for safe boiler operation because maintaining the correct water level is critical to ensure that the boiler operates efficiently and safely. If the water level is too low, it can lead to overheating and damage to the boiler, as well as potential hazardous situations such as a boiler explosion. Conversely, if the water level is too high, it can cause issues like water carryover, which can also damage the boiler and its efficiency.

Gauge glasses are designed to provide a clear and direct visual representation of the water level, allowing operators to quickly assess and maintain proper water levels. This makes them an indispensable tool for boiler management, ensuring the safety and effectiveness of the system.

In contrast, measuring pressure levels, monitoring temperature fluctuations, and determining fuel levels, while important functions in boiler operation and maintenance, are not the roles of the gauge glass. Each of these functions relies on different instruments designed specifically for those purposes, highlighting the gauge glass's unique function.