FFU high-efficiency filters are generally used in purification workshops, clean rooms, clean booths, etc. where purification is required. In order to extend the use time of the FFU high-efficiency filter, the fundamental method of Zui is to block the dust particles at the pre-filter. Moreover, when the pre-filter is replaced, there is generally no need to stop production and no debugging is required. Therefore, experienced owners will pay attention and money on pre-filter and protection-grade intermediate filters. Shanghai Sujing Industrial Co., Ltd. Chemical Materials,Sodium Benzoate,Sodium Diacetate,Potassium Sorbate CHANGZHOU GUANGHUI FOOD INGREDIENTS CO.,LTD , https://www.gsweetfood.com
For the 10K and 100K clean workshops, the pre-filtration uses G4 and the medium-grade filter with F8 at the intermediate level. Thus, the service life of the end high-efficiency filter is generally about 5 years. In foreign projects and new domestic projects, the F8 filter is a common pre-filter for non-uniform flow clean rooms.
In some cases, the requirement for high-efficiency filter life is not due to resistance considerations, but other factors. For example, hydrofluoric acid is present in the plant, and the air conditioner in the workshop is not a fresh air system. The glass fiber filter paper in the high-efficiency filter will be corroded by the return air, so for safety reasons, the high-efficiency filter must be replaced regularly. Some large pharmaceutical plants need to replace high-efficiency filters after the rainy season every year in order to prevent any possible mold contamination on the filter. Some biological laboratories and laboratories dealing with dangerous goods require a new high-efficiency filter to be reliable in order to carry out a new important issue.
　　
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