What is underfiling of impeller?

Underfiling of an impeller refers to a situation where the impeller is not adequately filled with the material it is designed to handle, often due to insufficient flow or a blockage in the system. This can lead to decreased efficiency, as the impeller may not generate the necessary pressure or flow rate required for optimal operation. It can also cause increased wear and tear on the impeller and related components, potentially leading to premature failure. Proper system design and maintenance are crucial to prevent underfiling.