The helium mass spectrometer leak detector uses different leak detection methods based on the different workpieces being tested. Before conducting product leak detection, it is necessary to have an understanding of the structure and manufacturing industry of the workpiece, as well as the sources of leaks, in order to quickly, accurately, and ruthlessly complete the leak detection.
The leakage of products is usually caused by incomplete connections and welding between various components during assembly, among which typical ones include electric welding (argon arc welding), copper welding (brazing), tin welding, glass/metal sealing, metal/ceramic sealing, O-rings and other shaped sealing rings, chemical (adhesive) sealing connections, and so on.
Leakage caused by defects in the container wall or by the wall being too thin belongs to another type. For example, if a particular part of a plastic bottle leaks air, microscopic observation shows many small cracks instead of a few small holes. At the top of the same metal can, at the sealing ring, the printed logo is too deep, and the remaining metal is too thin to prevent gas from spreading through many microcracks and entering the can. These can only be detected through high-precision leak detectors.
There is also a type of leak that is neither a leak nor a crack. The arrangement of the molecular structure of the container wall itself allows gas to diffuse through the wall.
Another type of leakage that cannot be distinguished from general concepts is “virtual leakage”. It is not a true hollow leak, but rather due to the release of gas inside another component or system. Improper welding structures, threaded connections, or press fit sealing connections can cause virtual leaks due to dead space. This type of virtual leakage often causes problems for vacuum systems, so understanding the leakage holes is a necessary condition for choosing a helium mass spectrometer leak detector.
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