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The difference between primary, medium, and high-efficiency filters
The difference between primary, medium, and high-efficiency filtersPrimary, intermediate, and high-efficiency filters have the following three differences function, material, and precision.1, the role of different Primary filter: It applies to the primary filtration of the air conditioning system, mainly used for filtering dust particles above 5μm. Intermediate filter: F series filter in the air filter, generally bag filter, including F5, F6, F7, F8, F9 level. It is widely used in the intermediate filtration of air-conditioning systems, mainly for filtering dust particles above 1-5 um. High-efficiency filter: mainly used to capture particles of dust below 0.5um and various suspended matters. 2、Different materials Primary filter: the outer frame material has a paper frame, aluminum frame, and galvanized iron frame, and the filter material has non-woven fabric, nylon mesh, activated carbon filter material, metal hole mesh, and so on. Intermediate-effect filter: bag, frame, and combination type. High-efficiency filter: it adopts ultra-fine glass fiber paper as filter material, offset paper, aluminum film, and other materials as dividing plate, and is glued with a wooden frame and aluminum alloy. 3、Different precision and speed of filtration Primary filter: G1--G4 5 micron 65% 80% 90% 95 Medium-effect filter: F5--F9 1 micron 60% 70% 80% 90% 95 High-efficiency filter: H10--H14 0.5 microns 95% 99.5% 99.95% 99.995% 99.9995% The air filter is the key equipment in the purification and air-conditioning system, which provides clean air for the clean room through the step-by-step filtration of the filter. Its performance directly affects the air purification effect of the purification air conditioning system and the cleanliness level of the room. Therefore, the purification air conditioning system must choose the appropriate air filter, and ensure its reliable operation. Air filters are divided into primary, intermediate, sub-efficient, and high-efficiency filters according to the filtration efficiency. Today, we will first introduce the general knowledge of the primary filter. 1、Use The primary filter is also known as the coarse filter, the primary filter is used as the front-end filtration in air filtration to effectively protect the filtration efficiency and service life of the lower filter, mainly used for filtering dust particles above 5μm. It is mainly used for filtering dust particles above 5μm. It is generally used in the primary filtration of air-conditioning systems and the pre-filtration of multi-stage filtration systems. The structure of the form of plate, folding type, bag type three. Structure The structure of the primary filter is generally divided into keel and frame. The characteristics of the skeleton are the sturdy and uniform distribution of filter material, but the production is time-consuming and labor-intensive. The frame skeleton is characterized by easy replacement of filter material, time-saving production, and slightly lower strength than the skeleton. There are paper frames, aluminum frames, and galvanized iron frames for the frame material, non-woven fabric, nylon mesh, activated carbon filter material, metal hole mesh, etc., and there are double-sided spraying wire mesh and double-sided galvanized wire mesh for the protective mesh. 3、Features The filter material can be replaced by itself, and the paper frame's primary effect is disposable. 4、Replacement cycle If the filter uses washable filter media, which is generally replaced once in 1-2 months, the filter media under replacement can be rinsed with water or solution containing neutral detergent, cooled and dried, and then replaced; at most, it is allowed to be cleaned for two times, i.e., it must be replaced with a new filter to ensure the filtration efficiency; When the resistance of the filter reaches more than 250Pa, the filter must be replaced; If the dust concentration in the use environment is large, this service life cycle will also be reduced. 5、Installation and use notes It is necessary to regularly check whether the filter over-plastic net is damaged, whether the air inlet surface is clogged with debris and whether the surface of the filter material is damaged; if there is debris clogging the surface, it should be cleared; if the surface of the filter material is seriously damaged, it is necessary to replace the filter material with a new one or to replace the filter with a new one for re-installation; When installing the filter, ensure good sealing at the crimp with the frame to prevent air leakage; do not hit the surface of the filter with heavy objects, and do not pull the surface of the filter media with force. |
