Vacuum pump is the use of mechanical, physical, chemical, or physical and chemical methods have been drawn for container extraction and vacuum devices or equipment to obtain. Popular terms, the vacuum pump is in a closed space with a variety of improved methods of generating and maintaining the vacuum apparatus. By vacuum pump works, pump basically be divided into two types, namely gas pumps and gas transmission pump trap. It is widely used in metallurgy, chemical industry, food, electronics and other industries coating.