In comparison to its predecessor models, it excels above all with a lower granulate destruction during operation. Coperion enlarged the inlet cross section with additional pellet deflecting profiles. In so doing, an increase in throughput performance of up to 20% results.
Even noise emissions from leakage gas expansion, which constitute the primary source of noise in high-pressure rotary valves (up to 3.5 bar differential pressure), have been markedly reduced with a new expansion opening design. Additionally, Coperion integrated the transition of the elongated opening to a pipe connection within the cast. Beyond reducing the noise emission, an adapter is likewise no longer required. Moreover, the ZV rotary valve now has a standard-compliant pipe connection.
The Finite Element Method (FEM) was used to calculate the cast housing, which optimized its rigidity while reducing the mass at the same time. This allows a narrow gap between the rotary valve and the housing, with the advantage of a low gas leakage rate when operating the new ZV pellet rotary valve.