02 initial effect folding filter frame materials include paper frame, aluminum alloy frame, galvanized iron frame, stainless steel frame, filter materials are non-woven, nylon mesh, activated carbon filter cotton, metal hole mesh, etc., protective net has double-sided spray plastic wire mesh and double-sided galvanized barbed wire mesh. Low price, light weight, good versatility and compact structure. 02 02 Uses: The primary effect filtration used in air conditioning systems is mainly for the filtration of particles above 5.0 μm, dust and various suspended matter. It has the characteristics of large air volume, low resistance, high dust capacity, long service life, etc. 02 02 02 Medium efficiency filter features: high dust capacity, good air permeability, filtration, long service life. Uses: air filter system pre-filtration, clean room clean room secondary filtration, hospital, pharmaceutical factory, electronics factory, spray paint room with higher clean air requirement level filtration system, general building air filtration specifications, high-efficiency filter pre-filtration. 02 02 02 The high-efficiency filter has the characteristics of filtration, low resistance, large dust capacity, etc. The high-efficiency filter can be used in the air conditioning end air supply of dust-free purification workshops in optical electronics, LCD LCD manufacturing, biomedicine, instrument, beverage, food, PCB printing and other industries. High efficiency and efficiency filters are used at the end of the clean room. In their structural form, they can be divided into high-efficiency filters with partitions, high-efficiency filters without partitions, high-efficiency filters with large air volume, and efficiency filters. In addition, there are three high-efficiency filters, one is an efficiency filter, which can purify 99.9995%. One is a high-efficiency air filter without a partition, which has the function of preventing bacteria from entering the clean workshop, and the other is a sub-high efficiency filter, which used to be cheap and mostly used in low-demand purification spaces.