The quality of mechanical parts and tools and its properties of the physical and chemical have something to do with the heat treat during the process of production to a large extent. The dry bath furnace transformer has been widely used in the machinery manufactures industrial, and therefore can improve the quality of the mechanical parts and tools. The capacity of HUDG, HUSG type furnace transformer is from 25KVA to 200KVA, and is suitable for the adjustments of voltage in the 50Hz rated frequency of exchange lines.