Differential element method of quality 【 3 m filter.

A, see filter material

air filter major filter material is filter, the filter filter paper mainly adopts domestic and imported paper, no matter domestic or imported paper has good filtering performance, and counterfeit filter using inferior filter paper, prevent dust into the engine, which affects the normal work of the engine. General quality goods of the filter, the color of filter paper paper compares level; And inferior filter filter paper color is not unified, paper beard hair, is of poor quality,

2, the filter glial

the current water treatment filter element of the structure of the general filter paper and rubber adhesive, and the true and false filter glial also is distinguishing. The real filter rubber quality of a material is better, elastic, and counterfeit filter rubber soft, is of poor quality. Is relatively easy to identify the method is to put the air filter can be folded in half and loosen the authentic after filter soon return to original state, and counterfeit filter due to the rubber quality problems, and the filter paper glue is not good, folded in the middle of the obvious effect.

in addition, there are some signs, such as the import of belt line, of course, domestic others to copy, but careful observation is not the same.

water purifier with the first level is the PP filter, also called melt-blown PP material is polypropylene ( PP material) , main effect is to filter in tap water is greater than a micron in diameter of various harmful impurities, organic pollution minerals sundry etc. Because there is no drainage function, the service life of it is usually 3 - 6 months, so be replaced periodically filter, otherwise it will cause secondary pollution, water quality can not be guaranteed. According to the scope of use can be divided into 10 inch & ndash; 40 inch range, according to the special requirements, density, length and weight to make to order. See first density, according to the difference between aperture PP can be divided into 1 um and 5 um, look at weight also has about 100 g and 110 g, aperture to the naked eye can't identify, weight and tactility is can use hand to distinguish. Filter quality directly affect the quality of water purifiers and filtering effect, so the general with the commonly used 1 micron and 5 microns, heavy for. At the same time as PP cotton filter is commonly used in former level 3, so be sure to change regularly, otherwise the service life of RO membrane and the quality of the output water is influential in TDS.

PP cotton filter is good hard or soft? Actually denser holding up strong, also means that compressibility is high also, filtration precision and service life is longer, the PP and soft in large water pressure or use time may be scattered, after falling filter degree, affect the normal operation of RO machine, and so to both quality and prices are now the dominant PP can fundamentally improve the quality of the whole water purifier.