OVERVIEW: The pump was rebuilt and returned to service within a few weeks whereas a new replacement pump would have had a lead time of 20 weeks. The client was extremely happy thanks to the experienced Chemcote team and the exceptional corrosion resistance and machinability of the Chem-tect™ RB 300 series.
INDUSTRY
ENVIRONMENT
50-70°C 10-40μm abrasive particles from the dust catcher are disposed of in the pugmill and combined with water to suppress the dust creating an abrasive sludge
SUBSTRATE
Cast and machined carbon steel
CHALLENGE
With an unprotected carbon steel pump, the rotor and barrel generally suffer rapid corrosion through contaminated water or acidic solvents used as sealant solutions. This leads to premature failure, inefficiency and costly repairs.
Chemcote’s challenge was to specify a coating that would repair the existing corrosion damage, restore the barrel and rotor back to the manufacturers original tolerances, extend the life of the Siemens pump, increase efficiency and prevent premature failures.
SOLUTION
Chemcote recommended the RB 300 series coating system with the ability to rebuild the pump’s corroded components back to the manufacturer’s original specifications
SCOPE
Pre-balance and pre-machine to allow for coating thickness
Abrasive blast to Class 2.5, minimum 50μm profile
Apply Chem-tect™ RB 300 to a DFT of 1000μm
Build up machined surfaces using RB 300 to a DFT of 3000μm
Post machine and post balance to clients required tolerances
Carry out DFT checks and holiday test to 8kV DC
PRODUCTS
OUTCOME
The vacuum pump was rebuilt and returned to service within a few weeks. A new replacement pump had a lead time of 20 weeks. The client was extremely happy thanks to the experienced Chemcote team and the exceptional qualities of the RB 300 series.
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