During decarburization procedures the Gas-Cooling Roots Pump china vacuum system needs to operate long time in a rough pressure range. A competent gas-cooling is necessary as the extracted sizzling gases would or else overheat the filter and vacuum system.
With the development of technology and the improvement of product quality in aerospace, energy, iron and steel digesting, pharmaceutical and chemical industries, these industries have to obtain a certain vacuum environment. Simultaneously, the vacuum system utilized by these industries can be continuously increasing, and the vacuum level is continuously increasing. Furthermore, the state’s environmental security, energy conservation and three wastes discharge to the above-talked about industries, etc. Certain requirements are more stringent. At present, the prevailing dry vacuum pumps in the marketplace, such as screw vacuum pumps and claw vacuum pumps, are unable to meet up with the requirements of oil-free large pumping speed clean vacuum environment proposed by these industries because of the restrictions of pumping speed characteristics and structural mechanism.
Because 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 satisfy the use in a clean vacuum environment with huge oil-free pumping speed.