The filtration section of the filtration system is the core part of the filtration system. It is not only a barrier for the filtration system, but also a very important barrier. Therefore, the choice of filter element is particularly important. Here The editor recommends polytetrafluoroethylene filter paper to everyone.
With the continuous development of science and technology, there are more and more applications of clean rooms, and the production of many products is inseparable. Clean room, also known as clean room or clean room. The final filter of its purification system generally uses a high-efficiency filter or a sub-high-efficiency filter. According to our country’s standards [1], the efficiency of high-efficiency filters is divided into four levels: Class A is ≥99.9%, Class B is ≥99.9%, C is ≥99.999%, and Class D (for ≥0.1μm particles) ≥99.999% (also (called ultra-high-efficiency filter); sub-high-efficiency filter [2] is (for ≥0.5μm particles) 95~99.9%. The higher the efficiency, the more expensive the filter is. Therefore, when selecting a filter, you should not only meet the air supply cleanliness requirements, but also consider economic and reasonable considerations. Considering the cleanliness requirements, the principle is to use low-performance filters for low-level clean rooms and high-performance filters for high-level clean rooms. PTFE filter paper is very important. Generally speaking: high-efficiency filters can be used for 1 million levels; sub-high efficiency or class A high-efficiency filters can be used for levels below 10,000; class B filters can be used for levels 10,000 to 100; class C filters can be used for levels 100 to 1. . There seem to be two types of filters to choose from for each cleanliness level. Choosing high-performance or low-performance filters depends on the specific situation: when the environment is seriously polluted, or the indoor exhaust ratio is large, or the clean room It is particularly important and requires a larger safety factor. In these or one of these cases, a higher-class filter should be selected; otherwise, a lower-performance filter can be selected. For clean rooms that require control of 0.1 μm particles, Class D filters must be selected regardless of the particle concentration controlled. The above is only from the perspective of the filter. In fact, to choose a good filter, you must also comprehensively consider the characteristics of the clean room, filter characteristics and purification system characteristics.
The polytetrafluoroethylene filter paper currently independently developed and produced is the core filter material at the end of the clean room, with a reliability level of H13-U16 Level filtration efficiency, with ULPA (Ultra High Efficiency Air Filter), HEPA (High Efficiency Air Filter) and sub-high efficiency filtration levels. PTFE filter paper has low wind resistance and low energy consumption, and is widely used in semiconductor, electronics, flat panel display and other fields. Interested parties can enter the store for consultation and purchase!
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