Good characteristics:

1. High utmost vacuum rate, it can be less than 0.5mbar,

2. High deflating speed,

3. Low noise while working, lower than 67 db;

4. Reliable structure to prevent oil circumfluence;

5. Strong capacity in deflating the vapor;

6. Keeping inlet air pressure 1.33*103Pa, it can be still working on;

7. Protecting environment; an oil fog clearer is set in the vacuum, and no oil fog in the exhaust air.

8.Tight structure, scientific and reasonable design, and it is easy to install in the industry system.