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During decarburization Gas-Cooling Roots Pump china processes the vacuum system must operate long time in a tough pressure range. A competent gas-cooling is necessary as the extracted incredibly hot gases would or else overheat the filter and vacuum system.

With the development of technology and the improvement of item quality in aerospace, energy, iron and steel processing, pharmaceutical and chemical industries, these industries need to obtain a specific vacuum environment. At the same time, the vacuum system utilized by these industries is definitely continuously increasing, and the vacuum level is continuously increasing. Moreover, the state’s environmental protection, energy conservation and three wastes discharge to the above-talked about industries, etc. Certain requirements are more stringent. At the moment, the existing dry vacuum pumps available, such as screw vacuum pumps and claw vacuum pumps, cannot meet the requirements of oil-free large pumping acceleration clean vacuum environment proposed by these industries due to the restrictions of pumping acceleration characteristics and structural mechanism.

In view of the shortcomings of the prevailing technology, the specialized problem to be solved by the utility model is to provide an all-gas-cooled vacuum system to fulfill the use in a clean vacuum environment with large oil-free pumping speed.