Why is removing air from the water important in the de-aerating feed tank?

Removing air from the water in the de-aerating feed tank is critical because it prevents cavitation in the pumps. Cavitation occurs when vapor bubbles form in a liquid due to a pressure drop, which can happen if air is present in the system. These bubbles can collapse violently when they reach higher pressure areas, leading to potential damage to pump components, reduced efficiency, and increased wear. By de-aerating the water, you ensure it is free from air, thus maintaining consistent pressure and flow within the pumping system, which is essential for optimal operation in a naval reactor setting. The removal of air helps maintain the integrity of the pumping equipment and contributes to the overall reliability of the feedwater system.