It is also called Air Activated Conveyor or Pneumatic Gravity Conveyor. This is essentially a rectangular duct divided into an upper part (Dirty Chamber) and a lower part (Clean Chamber) by means of a 5mm thick canvas, made of 100% polyester material, resistant to abrasion and temperatures up to 120ºC. With an inclination of between 8 and 10º. The material is fed through the top of the porous medium. Pressurized air is introduced through the lower part or clean chamber. Air penetrates through the porous medium and fluidizes the material allowing it to slide or run and creates a continuous flow from inlet to outlet.