The Rotorcheck system of Coperion, for which patent is applied for, is based on a monitoring device that detects any metallic contact between the rotor and the housing. This contact may result either from the presence of foreign particles or from a process malfunction, such as a sudden increase in product temperature, for example, which may cause the rotor blades to expand and grate against the housing. Further causes may be a dam-aged bearing or incorrect installation and/or maintenance of the rotary valve.
In all these cases, Rotorcheck not only prevents serious damage to the rotary valve itself but also protects the product, which in most cases is conveyed by a pneumatic conveying system, against contamination by metallic particles (abraded metal). Ro-torcheck is also suitable for systems designed for use in hazardous locations. Since the inte-rior of the rotary valve is in such cases frequently categorized as Atex Zone 20, the part of the system within of the rotary valve interior is rated to meet the requirements of category II 1D.
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