Pump Renovation and Vibration Issue Resolution

This technical report outlines the renovation process of a two-stage pump that experienced vibration issues, which led to its removal from service by a major steel manufacturer. The report details how HydroAire identified the cause of the vibration as incorrect weights welded onto the impeller and describes the corrective measures taken to restore the pump to operational condition. The renovation involved removing the existing impeller weights, honing oversized bores, and machining various components to meet high balancing standards. The report also discusses the importance of adhering to specific engineering principles and standards, including API 610 and Hydro Engineering Standard HEDM-1027, during the repair process. Following the renovations, the pump was successfully tested and returned to service, demonstrating optimal vibration results. The report concludes with insights into the challenges faced during the repair and the methodologies employed to ensure proper balancing and functionality of the pump.