German
French
Italian
Portuguese
Japanese
Korrean
Russian
FAQs on High-efficiency Air Filters for Clean Rooms
FAQs on High-efficiency Air Filters for Clean RoomsWhat are the actual and nominal dimensions of high-efficiency filters with and without partitions?A: Why are there actual and nominal dimensions for high-efficiency filters with and without partitions? This is because the nominal dimension includes the outer frame and filter material, while the actual dimension generally excludes the outer frame and only calculates the width, height, depth, and area of the filter material. What are the similarities and differences between high-efficiency filters with and without partitions? A: High-efficiency filters can be divided into high-efficiency filters with partitions and high-efficiency filters without partitions. High-efficiency filters with partitions use ultra-fine glass fibers as filter material, offset paper, and aluminum platinum as partitions, and are glued with wooden frames or aluminum alloy frames. They have the advantages of high filtration efficiency, low resistance, and large air volume, and are widely used in various local purification equipment and clean workshops. High-efficiency filters without partitions use ultra-fine glass fibers as filter material and hot melt adhesive as partitions. They are assembled with various outer frames, and the outer frames are beautiful. Compared with high-efficiency filters with partitions, they have the advantages of small size, lightweight, compact structure, and reliable performance under the same air volume. What are the standard folds, fold heights, and formula conversions for filter media with and without partitions? Answer: The fold height of filter paper with partitions is generally about 30mm~34mm shorter than the nominal size. The folds are mainly determined by the tightness of the partition paper and the assembly of the filter paper and the partition paper. The curvature of the partition paper is calculated according to the standard, generally 4mm. If it is less than 4mm, the partitions with partitions will be more. In addition, if the assembly is loose, the result will be counterproductive, and the partitions with partitions will be less. The folds of filter paper without partitions are mainly determined by the fold height of the filter paper and the tightness of the filter paper. What are the similarities and differences between "PP HEPA" and glass fiber "HEPA"? Answer: The comparison table between "PP HEPA" and glass fiber "HEPA" is as follows: Item PPHEPA Glass fiber HEPA Skin irritation No Yes Fiber shedding No Yes And the shedding fibers are seriously harmful to the human body. Filtering effect Good Good Wind resistance Small (about times that of PPHEPA) What are primary, medium, high, sub-high, and high-efficiency filters? Answer: The primary filter is suitable for pre-filtration of air-conditioning systems, mainly used to filter dust particles above 5um. There are three styles of primary filters (folding, plate, and bag). The outer frame materials include paper frame, aluminum frame, and galvanized frame, and the filter materials include non-woven fabrics, nylon mesh, activated carbon filter materials, and metal mesh. Medium efficiency filters are widely used in intermediate filtration of air-conditioning systems, mainly used to filter dust particles of 1um~5um, with the advantages of small resistance and large air volume. Medium efficiency filters are bag-type, frame-type, and combined-type. Rfilter high-efficiency filters are mainly divided into two types: filters with partitions and filters without partitions. What are the functions and principles of the fan filter unit FFU? Answer: The FFU laminar air supply unit can be connected in modules, making it widely used in clean rooms, clean workbenches, clean production lines, assembled clean rooms, and laminar flow hoods. The FFU is equipped with primary and high-efficiency two-stage filtration filters. The fan draws air from the top of the FFU and the clean air filtered by the primary and high-efficiency filters is evenly delivered on the entire air outlet at a wind speed of 0.45m/s+20%. |
