Using negative air pressure, the dry destoner makes the wheat flow on an air cushion. The heavier foreign materials (stones, glass etc.) stay on the vibrating sieve. The sieve acts as an escalator and carries the product to the discharge spout. The machine is driven by two vibration motors. The vibrating body is isolated from the chassis by spring vibration dampeners and the vibration is isolated. The inclination and air suction level is adjusted for proper cleaning.