Impeller was taken out of service due to reduced flow rate and very poor efficiency.

To rebuild the impeller back to its original specification using ARC 897, ARC 858 and  ARC 855 ceramic composites.

Firstly the impeller was shot blasted then inspected for cracks and flaws.  The tips of the flights were found to be badly damaged so the impeller was cut back and new sections inserted. The impeller was then re-blasted to SA 2.5 and measured profile was 106 microns. Next the item was solvent washed with Chesterton 204, a non flammable solvent which leaves no residue.  The wear ring and blade tips where coated with ARC 897 to combat the high erosion seen in these areas and the wear ring was then machined to size with diamond tipped tooling.

Next the impeller was masked and all pit marks and holes were filled with ARC 858, the impeller was the given 1 coat of ARC 855 Grey and 1 coat of ARC 855 Black.  Finally the impeller was dynamically balanced to ISO G2.5 and flash blasted and coated with ARC S2. 

All the work was completed in 5 working days.

Repair costs were 40% of the cost of a new impeller.  From a performance perspective, the impeller has been proven to be more efficient than when new.