During decarburization processes the vacuum system must operate long time in a tough pressure range. An efficient gas-cooling is essential as the extracted scorching gases would or else overheat the filter and vacuum program.

With the development of technology and the improvement of product quality in aerospace, electric power, iron and steel digesting, pharmaceutical and chemical industries, these industries have to obtain a specific vacuum environment. At the same time, the vacuum system used by these industries can be continuously raising, and the vacuum degree is continuously increasing. Furthermore, the state’s environmental security, energy saving and three wastes discharge to the above-talked about industries, etc. The requirements are more stringent. At present, the existing dry vacuum pumps in the marketplace, such as screw vacuum pumps and claw vacuum pumps, are unable to meet the requirements of oil-free large pumping swiftness clean vacuum environment Gas-Cooling Roots Pump china proposed by these industries due to the restrictions of pumping velocity characteristics and structural system.

In view of the shortcomings of the existing technology, the technical problem to be solved by the utility model is to supply an all-gas-cooled vacuum system to satisfy the utilization in a clean vacuum environment with huge oil-free pumping speed.