Which component is used to prevent backflow of water in a feedwater line?

The check valve is specifically designed to prevent backflow of water in a feedwater line, ensuring that the flow of water occurs in one direction only. In a feedwater system, maintaining the correct flow direction is critical to prevent contamination and maintain efficient operation. The check valve operates automatically, allowing water to flow through it in the intended direction while blocking any potential reverse flow, which can occur due to pressure changes or system malfunctions.

In contrast, while a flow meter measures the flow of water, it does not control or prevent backflow. A filter serves to remove impurities and debris from the water, but it also does not influence the direction of flow. A pump is responsible for moving water through the system but does not provide backflow prevention either. The unique function of the check valve as a one-way device makes it essential for safeguarding the integrity of the feedwater supply system.