Which limitation increases when centrifugal chiller liquid pumps experience inadequate Net Positive Suction Head Available (NPSHa)?

💡 Explanation

Inadequate NPSHa causes the liquid to vaporize and form bubbles near the impeller inlet due to the decreased pressure dropping below the liquid's vapor pressure. This cavitation erodes the impeller because of the imploding vapor bubbles; therefore, vapor lock and cavitation occur rather than electrical or mechanical overload.

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