Vacuum system leakage detection

1. Basic conceptions of the vacuum leakage detection

The air leakage refers to the phenomenon that the gas flows from high pressure to low pressure side through the leakage hole or gap on the vacuum system. 

Some common basic concepts in vacuum leakage detection technology mainly have the following points.

Virtual leak. air tightness. bore sight. leak rate. Minimum leak detection rate. Leak detection sensitivity. Reaction time. 

Elimination time. Air tightness block up

2. Air leakage judging method

1） Does vacuum pump work well?

2） Does severe venting with the vacuum system?

3） Does air leak happen between the vessel wall or gap of the vacuum system?

4） If air leakage and gas release coexist?

3. vacuum leakage detection method

1） Moving element: drive shaft and its sealing parts

2）Glass or ceramic and other parts of easy to fragile and broken

3）Bellows

4）Sealing parts using flanges and gaskets

5）The cracks in the weld section

4. vacuum leakage detection skills

1） For vacuum containers or devices in the process of manufacturing, bubble leak detection is preferred

2） There seems to be no damage to the vacuum container or device when in use, but when the pressure is now rising sharply, 

      first check where it is considered to be easily damaged with the point vacuum gauge and alcohol or acetone as the leaking liquid.

3）If can't find the leak in spite of all these efforts, use the cover method or the pressure rise method to detect whether the leak

    is leaking