During decarburization procedures the vacuum system needs to operate long time in a rough pressure range. An Gas-Cooling Roots Pump china efficient gas-cooling is necessary as the extracted 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 particular vacuum environment. At the same time, the vacuum system used by these industries is usually continuously raising, and the vacuum degree is continuously increasing. Moreover, the state’s environmental security, energy conservation and three wastes discharge to 
the above-described 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 velocity clean vacuum environment proposed by these industries due to the restrictions of pumping speed 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 supply an all-gas-cooled vacuum system to fulfill the utilization in a clean vacuum environment with huge oil-free pumping speed.