During decarburization processes the vacuum system needs to operate long time in a tough pressure range. A competent gas-cooling is essential as the extracted popular gases would otherwise overheat the filter and vacuum program.

With the Gas-Cooling Roots Pump china development of technology and the improvement of product quality in aerospace, electric power, iron and steel processing, pharmaceutical and chemical industries, these industries need to obtain a particular vacuum environment. At the same time, the vacuum system utilized by these industries is usually continuously increasing, and the vacuum degree is continuously increasing. Moreover, the state’s environmental protection, energy saving and three wastes discharge to the above-pointed out industries, etc. Certain requirements are more stringent. At present, the existing dry vacuum pumps available, such as for example screw vacuum pumps and claw vacuum pumps, are unable to meet up with the requirements of oil-totally free large pumping velocity clean vacuum environment proposed by these industries because of the restrictions of pumping speed characteristics and structural system.

Because of the shortcomings of the existing technology, the technical problem to be solved by the utility model is to provide an all-gas-cooled vacuum system to satisfy the use in a clean vacuum environment with large oil-free pumping speed.