What action does an automatic blowdown controller perform?

An automatic blowdown controller is specifically designed to monitor the water quality in a boiler system and adjust the blowdown rates accordingly. The blowdown process involves releasing a portion of the boiler water to control the concentration of impurities, such as dissolved solids, which can accumulate over time. By automatically adjusting the blowdown rates based on the water quality parameters, the controller ensures that the water remains within acceptable limits, thus maintaining optimal efficiency and safety of the boiler operation. This not only helps in prolonging the life of the equipment but also contributes to energy savings and improved performance.

Options that suggest increasing water temperature, decreasing feedwater flow, or improving steam output do not directly relate to the specific functionality of an automatic blowdown controller, as its primary role is centered on managing water quality through blowdown adjustments.