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Why can regenerative pumps not handle liquids containing solid particles?
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pump
Figure 1: External gear pump
Regenerative pumps, also known as turbine or peripheral pumps, are designed with very close clearances between the impeller vanes and the pump casing to maintain efficiency and generate pressure. Because of these tight tolerances, they cannot be used to pump liquids containing solid particles, as the presence of solids would interfere with the internal components and likely cause damage or mechanical failure.1