ViscoTec recently announced that it has developed a ceramic dispenser rotor for the reliable dosing of abrasive fluids such as thermally conductive one- and two-component gap fillers, one-component heat-conducting pastes, or highly filled two-component adhesives. The ceramic rotor is fully compatible with the dispensing and mixing systems of the ViscoTec RD dispenser series (both one- and two-component systems). Geometric dependencies and dispensing settings are the same as the traditional rotor, enabling the simple conversion of existing systems to the ceramic rotor.

In order to further increase the service life of dispensers for highly abrasive liquids and pastes, ViscoTec reports that the performance of a variety of ceramics was determined in numerous tests. The ceramic rotor incorporated in the portfolio on the basis of these findings reportedly enables a significant increase in the service life of the dispensing system. First long-term tests show an increased service life by a multiple than with conventional hard chrome-plated stainless steel rotors; the ceramic rotors did not  show any signs of wear until the end of the tests.

The rotor assembly is available in two versions, depending on the requirements of the material to be dispensed: as a ceramic rotor with hard chrome-plated drive shaft, or as an all-ceramic version where both the ceramic rotor and the drive shaft are made of ceramic. With a triple Vickers hardness, the ceramic surface is considerably harder than that of the stainless steel rotors. When working with highly abrasive materials, this results in significantly lower wear and therefore longer service life.

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