What is the purpose of shaft seals in a pump?

The purpose of shaft seals in a pump is to prevent air from being sucked into the pump. When a pump operates, especially in centrifugal designs, it's critical to maintain a sealed environment to ensure that fluids move efficiently without the introduction of air, which can lead to cavitation or reduced performance. If air enters the system, it can create issues such as damage to the impeller, loss of prime, and inefficiencies in moving the fluid.

This sealing mechanism is essential for maintaining the integrity of the pressurized environment needed for effective fluid transport. Proper sealing helps ensure that the pump functions optimally, safeguarding against leaks and maintaining the necessary pressure and flow rates within the system.