In continuous dosage, macro and micro-products (powders, granules, solids and liquids) are dosed by volume from the extraction system of the silos, the hoppers, the big-bag or sack unloading systems. The product is taken in the exact quantity required by the pre-set recipe and conveyed through transport systems to the feeding cyclone. The use of filters allows the transport air to escape, separated from the product, and the cleaning of the sleeves.