During decarburization processes the vacuum system needs to operate long time in a rough pressure range. An efficient gas-cooling is necessary as the extracted scorching gases would otherwise overheat the filter and vacuum program.
With the development of technology and the improvement of item 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 is certainly continuously Gas-Cooling Roots Pump increasing, and the vacuum level is continuously increasing. Furthermore, the state’s environmental security, energy saving and three wastes discharge to the above-described industries, etc. Certain requirements are more stringent. At the moment, the prevailing dry vacuum pumps on the market, such as screw vacuum pumps and claw vacuum pumps, are unable to meet the requirements of oil-free large pumping velocity clean vacuum environment 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 provide an all-gas-cooled vacuum system to satisfy the use in a clean vacuum environment with huge oil-free pumping speed.
