How does an automatic feedwater regulator function?

An automatic feedwater regulator is designed to maintain the desired water level in a boiler by automatically adding feedwater as needed. This device continuously monitors the water level and makes adjustments by controlling the flow of feedwater to ensure that the level stays within a specific range. Maintaining the correct water level is crucial for safety and efficiency, as it helps prevent issues such as overheating or boiler damage.

While some options may reference important aspects of boiler operation, they do not directly pertain to the primary function of the automatic feedwater regulator. For example, the regulator does not shut down the boiler due to high levels, nor does it manually adjust the water level or remove excess steam pressure, which are handled by other safety devices and auxiliary systems in the boiler setup. Thus, the role of the automatic feedwater regulator is specifically focused on the accurate and automatic maintenance of the water level.