Pump Impellers. Impellers shall be the totally enclosed type. The impellers shall be constructed from Stainless Steel or ASTM B584 Silicon Bronze and statically balanced. They shall be free from defects and must be accurately cast, machined, balanced, and filed for optimum performance and minimum vibration. Impellers shall be smoothly finished on all surfaces to reduce friction losses to a minimum. Impellers shall be balanced to grade G6.3 of ISO 1940 as minimum. They shall be securely fastened to the bowl shaft with taper locks of 416 SS.
Appears in 2 contracts
Sources: Well Rehabilitation Contract, Pumping Unit Repair and Well Rehabilitation Contract