2 minute read
industrial pump components
A method of repairing worn, corroded or damaged industrial pump components that has gained popularity, because of cost and time savings, involves using manufactured-for-purpose polymeric materials.
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These materials are easy to apply without any specialised equipment, cure rapidly to a metal-like hardness, and are generally easily machined on a lathe, drilled, tapped, filed, sanded, or polished. Many polymers have outstanding resistance to a broad range of chemicals, including inorganic acids, alkalis, hydrocarbons, mineral oils, oxidizing agents, vegetables and fats, alcohols, aqueous solutions, and emulsions. There are, additionally, polymers that contain a ceramic filler material to provide excellent abrasion and impact wear resistance. Gauteng-based company, Advanced Material Science and Engineering (Pty) Ltd (AMSE) supplies DIAMANT GmbH polymer products and application services for the repair of any pump components manufactured from any base materials such as cast iron, steel alloys and all popular nonferrous alloys, including brass.
DIAMANT has been an internationally recognized name in innovative polymer systems and coatings for over 130 years, primarily operating in Europe, but with branches worldwide. Now AMSE is excited to bring these unique products to the southern African market. The product range offered by AMSE includes Ultrametal, a twocomponent epoxy system that effectively dimensionally restores small to large defects, wear, or corrosion on metal components. As it is a cold repair process, any heat input into the component is avoided altogether. Stress cracking, distortion and time-consuming machining and post-weld heat treatment is completely omitted in the repair process. AMSE also offers RepaCoat, a wear and/or corrosion resistant polymer coating that protects surfaces from abrasion, impact wear, cavitation or a wide range of chemical exposures. The RepaCoat series of coatings, designed for abrasion and impact resistance, are also resistant to many chemicals, so applications such as slurry pumps (that may be exposed to a limited amount of sulphuric acid) are well protected by RepaCoat. Finally, another exclusive product offered by AMSE is Dichtol, which is designed to seal porosity in castings up to 0.5mm in diameter. Dichtol does this through capillary action and can withstand up to 300 bar pressure at 300°C once cured.
All this is achieved by simply applying the product to the leaking area by brush, spray, or dipping. It cures in ambient conditions and is ready for pressure testing after only 24 hours.
Worldwide, there have been numerous applications of this type of repair, for example:
• Worn shafts • Scored rams • Stripped or otherwise damaged threads • Casings with cracks, blowholes, pores, or general wear • Impellers worn by cavitation, erosion, or corrosion • Worn keyways • Pipes, tanks, and general bulk material containers • Warped, distorted or steam-cut flange faces • Oversized bearings or bush housings AMSE prides itself on assisting its customers at their points of need with technical expertise, on-site repairs and fast turnarounds. The AMSE team will ensure your operations are up and running in minimal time, and as cost-effectively as possible.
