Mecair produces a complete series of air cannons to dislodge all types of dust which stick to the walls of the hoppers and the bottom of the silos. These devices are more efficient than “fluidification” and “vibration” systems, especially with particularly sticky dust. The air cannons consist of two basic elements: the first is the Mecair diaphragm valve with an extremely high flow rate and the second is an air accumulator. The valves are quickopening and discharge instantaneously the pneumatic energy of the tank on which they are mounted, striking the material to be dislodged with a violent impulse of compressed air. A strong vibration spreads to all parts of the product, causing the dust to fall, without stressing the silo’s structure.