During decarburization procedures the vacuum system needs to operate very long time in a rough pressure range. An efficient gas-cooling is essential as the extracted sizzling gases would or else overheat the filter and vacuum system.
With the development of technology and the improvement of item quality in aerospace, electric power, iron and steel digesting, pharmaceutical and chemical industries, these industries have to obtain a particular vacuum environment. Simultaneously, the vacuum system utilized by these industries is usually continuously raising, and the vacuum degree is continuously increasing. Moreover, the state’s environmental protection, energy conservation and three wastes discharge to the above-described industries, etc. 
Certain requirements are more stringent. At present, the existing dry vacuum pumps in the marketplace, such as for example screw vacuum pumps and claw vacuum pumps, cannot meet the requirements of oil-free large pumping swiftness clean vacuum environment proposed by these industries due to the गैस-कूलिंग रूट पंप चीन restrictions of pumping acceleration characteristics and structural mechanism.
In view of the shortcomings of the prevailing 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 huge oil-free pumping speed.