Filter structure and material selection

Filter structure and material selection

Generally speaking, a filter refers to an accessory that filters impurities or gases through filter paper; according to different filtering functions, it can be divided into: oil filter, fuel filter, air filter, air conditioning filter Wait, but the structure of different filters is also different; the following is a technical staff to introduce the structure and material selection of several filters:

　　 filter

　　The first type: primary filter

　　 Structure: The outer frame mainly includes: paper frame, galvanized frame, aluminum alloy frame, stainless steel plate. There are plate type and bag type structure.

　　Filter material: Fiber filter material mainly includes: chemical fiber non-woven fabric, glass fiber filter material, some manufacturers have mixed filter material of cotton fiber and chemical fiber, others also have metal mesh.

　　Production method: Most of them are folded and formed, metal mesh and filter material are composite folded.

　　 The second type: medium efficiency filter

　　 Structure: The outer frame materials mainly include: galvanized steel sheet, aluminum alloy profile, plastic frame, paper frame, etc.

　　The filter material mainly includes: chemical fiber, glass fiber and PP material.

　　 The third type: high efficiency air filter

　　 Structure: The outer frame is mainly used: aluminum alloy profile, multilayer frame, aluminum frame, galvanized steel frame, the most used aluminum profile frame, mainly made into a cubic structure.

　　Filter material: glass fiber is mostly used, and chemical fiber is gradually being used. At present, some foreign manufacturers use electrostatically charged polytetrafluoroethylene fiber (electret) to manufacture high-efficiency filters, commonly known as PTFE.

　　The above is the introduction of the structure and material selection of the filter. At present, the most commonly used is the bag structure of the glass fiber and PP filter material. Since there are countless domestic manufacturers of coarse and medium efficiency filters, the materials and structures used are also diverse. At present, mainstream manufacturers and foreign factories mostly use glass fiber filter media and some chemical fiber filter media. Chemical fiber is squeezing a larger and larger market due to its low price and low resistance.