Has the advantage of energy efficiency, high productivity, easy cleaning, simple structure, the barrel is designed for the industry of food, dairy , beverage, medicine , bioengineering, fruit wine , spice, essence, household chemicals to stir raw materials. The layers in the body of barrel could be heated or cooled by entering vapor or cooling water and fully agitates and mixes two materials (powders, additives, fluid) in the most appropriate temperature condition.