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Planning guideCeram coatingThe Ceram coating is also very well suited for use in maritime environments.For its Ceram C0 coating, Wilo grants a guarantee of 5years for use in seawater. The prerequisite is that the coating is intactIncrease efficiency, reduce costsSince water is being used more and more economically, the proportionof contaminants is increasing relative to the amount of water.This means that the concentration of corrosive and abrasive constituentsis higher.Sewage units are always exposed to this aggressive fluid. Corrosionand abrasion affect the surfaces and material structures of the units,sometimes with considerable impairments to the material, and thusalso the performance.This significantly reduces the hydraulic efficiency. This results in theunits having an increased current consumption. On the other hand,the pumps no longer work at their optimum, the radial forces increase,there is more stress on the bearings and mechanical seals, andthe service life of the machines is reduced.When standard materials are used, such as grey cast iron, under highstress, it may be necessary to exchange the components already after500 hours of operation. Ceram coatings allow the service life to beincreased by a factor of 4, and this at the same high efficiency, whichmeans minimum energy costs.If one takes the overall costs over the entire service life of the pumpinto account, the investment costs for a unit coated with Ceram areless than 10%, and thus negligible. On the other hand, there is a highsavings potential due to the fact that fewer repairs are required,resulting in a significant reduction of system downtimes. The amortisationis then usually quickly reached due to the higher efficiency.Use of the various Ceram qualities• Ceram C0 is used for the complete outer and inner coating. It's ideallysuited for corrosion protection.• Ceram C1 is used for the inner coating of pump components. Themain field of application is the coating of the impeller and the suctionport .• Ceram C2 and C3 are used for the inner coating of pump components.The main field of application is the coating of the pump housing.In order to guarantee protection even in especially aggressive andcorrosive fluids, the Ceram types are combined with each other, e.g.C2 + C1 or C3 + C1.32 Wilo Water Management catalogue – 50 Hz – Drainage and sewage – Waste water transport and dewatering – Edition 2012 – Subject to change without prior notice