There may be a variety of reasons for filter leakage, including the outer frame seal is not tight, the filter material is not smooth, the static pressure box leakage, the installation is not strictly in accordance with the regulations. The specific analysis is as follows:
1. The sealing effect of the outer frame is poor
If the sealing ring of the outer frame of the HEPA filter is not effectively sealed, it may lead to leakage. Seals may fail due to aging, damage, or improper installation of materials.
2. The filter material is not smooth and tight
If there is a gap between the binding part of the filter element and the frame of the filter, or the filter material itself is not smooth, it may lead to particle penetration.
3.plenum leakage
In some cases, there may be leaks in the plenum, which can lead to reduced filter performance. Leaks in the plenum may be caused by structural defects or installation problems.
4.The installation of the filter is not strictly operated in accordance with the regulations
If the operation procedures are not strictly followed during installation, for example, the fasteners of the filter are not uniformly tightened, leakage may result.
5.Insufficient means of leak detection
When detecting filter leakage, if the leak detection method is not correct or the accuracy of the leak detection instrument is not enough, some small leak points may be missed. For example, if the sample speed is too fast when scanning a particle counter, some leakage points may be missed.
6. Material corrosion of the filter
The material used in the filter may corrode due to environmental factors (such as gas composition, temperature, humidity), which may lead to a decline in material performance after long-term use, and then cause leakage. For example, gases containing H2S and CO2 may have corrosive effects on metal materials.
7.Comprehensive factors of the filter
Sometimes a filter leak can be the result of a combination of factors. For example, when the outer frame is not sealed well, if there are plenum leaks and non-standard installation problems, the risk of leakage will increase significantly.