The principle and technical characteristics of the high efficiency filter in depth analysis
Release time:
2022-04-21
With the development of clean technology, the changes in filter materials, structural forms, sealing materials, frame materials and detection methods of high efficiency air filters are progressing rapidly. In particular, the rapid changes in integrated circuit production require the production environment to control the dust diameter of 0.05-0.1m, the air cleanliness level requires level 1 or more stringent, the production environment of molecular-level chemical pollutants, heavy metal pollutants, etc.
In this regard, domestic and foreign scientific research, design and manufacturers have carried out a lot of research and development work, and achieved many available results, but there is still a big gap between domestic high-efficiency filtration products and international advanced products. In particular, it is used in clean rooms that are more stringent than Class 5 (Class 100).high efficiency filterThere are huge differences in the quality and testing methods of ultra-efficient filters.
According to China's national standard GB 13354-92 "high efficiency air filter",high efficiency filterIt is a sodium salt method detection, a filter with an efficiency of more than 99.9%, or a particle size) 0.15m particles are measured using a particle number, and a filter with an efficiency of more than 99.999% is used.
The fire resistance rating of the high efficiency filter is 3. For the first-class filter, all materials of the filter are discontinuous, and the discontinuous materials must comply with the national standards GB 8624 and A. 2-stage filter, the filter filter must be a discontinuity material, and the same 1-stage filter is required. Combustibles conforming to GB 8624 and B2 can be used for partitions and frames. 3-stage filter, all materials of the filter can be used GB 8624, B2 class combustibles.
What needs to be explained here is that the current domestic high-efficiency filter manufacturers are gradually producing in accordance with national standards. However, some factories do not display according to the standard requirementshigh efficiency filterperformance specifications, so be careful in the actual selection. Because of the high efficiency filter, the production is simple and the price is low, so far it is also suitable for many situations. The basic size of the barrier filter in China is 610mm, 484mm and 630mm, and the specifications of each manufacturer will change.
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