What is the function of the feedwater system in a boiler?

The feedwater system in a boiler is primarily responsible for supplying water to the boiler to replace any water that has been converted to steam during the combustion process. This function is crucial for maintaining the appropriate water level within the boiler, ensuring that it operates efficiently and safely. When steam is generated, it expands and exits the boiler, and the feedwater system compensates for this water loss to maintain a stable operation.

For a boiler to function correctly and avoid issues like low water levels, which could lead to overheating and damage, continuous replenishment of water is necessary. This process typically includes various components such as pumps, valves, and sometimes treatment systems, which help manage the flow and quality of water entering the boiler.

While filtering impurities and controlling temperature are important aspects of boiler operation and maintenance, they do not specifically define the primary role of the feedwater system. Therefore, the primary function remains focused on the replacement of water lost as steam.