What does priming in pump operations refer to?

Priming in pump operations specifically refers to the process of filling the pump casing with liquid to eliminate air pockets that can interfere with the pump's operation. When a pump is installed or has been out of service, air can accumulate in the system, leading to insufficient flow and potentially damaging cavitation when the pump is started. By filling the pump with liquid, it ensures that the pump can generate the necessary suction to draw more fluid from the source, allowing it to operate efficiently and effectively.

This process is essential, especially for centrifugal pumps, as they rely on a continuous column of liquid to function correctly. Not properly priming the pump can lead to dry running, which can cause wear and damage to the pump components. By ensuring the pump is properly primed, operators can avoid these issues and maintain smooth operation.