To correctly cook and condition the material prior to Flaker. Vertical, multi-stage unit with fabricated shell and trays where heating is carried out by indirect steam. The gates operated by mechanical level system automatically control the flow of material and the level in each stage. A central shaft driven by a gearbox carried agitator blades to ensure a good mix, a homogenous treatment of the material and prevents burning on the stage bottoms.  A vertical duct extracts exhaust vapors from each stage. Provision is made to adjust final moisture levels of the material by injecting water or direct steam.