Pump Impellers. Impellers shall be of the enclosed type, constructed of SAE 40 bronze. They shall be balanced hydraulically and dynamically to prevent vibration and shall be smoothly finished on all surfaces for minimum friction. Impellers shall be accurately fitted and securely locked to the pump shaft. Vertical adjustment of impellers shall be possible by adjusting top shaft nut. Impellers in multi-stage pumps shall all have the same diameter and trim.
Appears in 3 contracts
Sources: Well Pumping Unit Repair and Rehabilitation Contract, Contract for Public Work, Pumping Unit Repair and Well Rehabilitation Contract