Product Description Dust Collector innovative concept is about filtering media which is placed on the two sides of filtering groove, and suction nozzles mounted on the suction arms which are then driven by patented mechanism revolves for intermittent dust collection. Its convincing advantages: compact, reliable, efficient & economical. â?? Working principle: Electrical unit consisted of the first-stage disc pre-filter and the second stage multiple round cage dust-filter. The first stage filter is used to extract, separate, collect the fibrous dust in the processing air; The second stage filter is used to filter out the fine dust from the air exhausted from the first stage filter.