During decarburization processes the vacuum system needs to operate very long time in a tough pressure range. An efficient gas-cooling is essential as the extracted incredibly hot gases would otherwise 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 certain vacuum environment. At the same time, the vacuum system used by these industries is certainly continuously raising, and the vacuum level is continuously increasing. Furthermore, the state’s environmental security, energy saving and three wastes discharge to the above-stated industries, etc. Certain requirements are more stringent. At the moment, the existing dry vacuum pumps on the market, such as for example screw vacuum pumps and claw vacuum pumps, are unable to meet up with the requirements of oil-free large pumping velocity clean vacuum environment proposed by these industries because of the restrictions of pumping swiftness characteristics and structural mechanism.

Because of the shortcomings of the existing technology, the technical problem to be Gas-Cooling Roots Pump china solved by the utility model is to supply an all-gas-cooled vacuum system to fulfill the use in a clean vacuum environment with large oil-free pumping speed.