In these dryers, heat is supplied to jacket of stationary cylindrical housing. The material to be dried is kept in agitation by means of specially designed rotor. Features Configurations : Rotor Types: Helical Ribbon, Paddles, and Special. Heating Surfaces: Shell, End Covers, and Shaft. Heating Media: Steam, Hot Water/Oil, Thermic Fluid. Side Mounted Choppers. Solvent Recovery.