The Pullman-Ermator S26 is a powerful twin-engine HEPA Dust Extractor that can be connected to smaller grinders to extract freshly cut, friable concrete dust. The dust separation in the cyclone is done in 3 steps. The cyclone operation first separates the coarsest particles. Then, the finer dust is filtered out by a conical prefilter (99,9%). The remaining fine dust is separated with the aid of a HEPA-13 filter with a dust separation efficiency of 99,995%.