HIGH FLOW PROTECTION FOR VARIABLE SPEED PUMPS
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Low flow operation is a well-known cause of centrifugal pump failures and thus it is a custom to have low flow protection. On the other hand, protecting pumps from excessively high flow is usually not considered during project design due to natural process flow limitations or the reliance on motor overload protection. This paper presents detailed analysis of major failures that occurred in three 27,000 HP variable speed water injection pumps in which high flow operation was a major contributor to the failures. It includes the evaluation of the impeller hydraulics and material in addition to impeller modal analysis.
Al-Dhafiri, Amer; Al-Shuhail, Yousuf; Al-Odan, Nabeel (2011). HIGH FLOW PROTECTION FOR VARIABLE SPEED PUMPS. Turbomachinery Laboratory, Texas A&M Engineering Experiment Station. Available electronically from