Most of the first-stage filter element
s of household water purifiers or pure water machines use PP filter elements. Therefore, the quality of the PP filter element is particularly important for the water purifier. The PP filter element is made of polypropylene resin as raw material, and is formed by winding and bonding of the fiber itself. The structure of the filter element is a structure with thick outer fibers, thin inner fibers, loose outer layers, and tight inner layers. Filter from the outside to the inside, the closer to the inner layer of the filter element, the smaller the pore size, the higher the filtering accuracy. Because the particles will bridge in the pores of the PP melt-blown filter element, the particles smaller than the pores can also be blocked, which can effectively remove various particulate impurities in the filtered liquid; this unique gradient depth filtration forms a three-dimensional filter residue Effective, multi-layer deep structure, large dirt holding capacity; PP meltblown filter element has high strength, when the pressure difference between the filter inlet and outlet is 0.4Mpa, the filtration flow is large, the pressure difference is small, and the filter element is not deformed; The fine filter is integrated; it has the characteristics of large flow, corrosion resistance, high pressure resistance and low cost. It is used to block large particles such as rust, sediment, and insect eggs in the water. There are many types of PP cotton filter elements on the market, we are inevitably a little distressed when choosing, so how to judge the quality of the filter element and the problems that should be paid attention to when replacing it. 1. How to judge the quality of PP cotton filter The quality of PP cotton filter is determined by the tightness of its fibers. The internal fibers of a high-quality PP cotton filter are tight and uniform, and this difference cannot be seen with the naked eye when purchasing from. Many filter materials on the market are filter paper. Good filter paper has good filtration performance. The filter paper used by those inferior filter elements cannot prevent dust from entering the engine, which will affect the normal operation of the machine. First: look at the weight. We can measure the weight with our hands. The heavier the weight, the higher the fiber density of the filter element. The quality is also better. Second: look at the material. When choosing a filter element, you must be optimistic about the material of the filter element. The regular filter paper has a uniform color and a flat surface. The color of the filter paper of the inferior filter element is not uniform and the texture is poor. Third: Look at compressibility. Generally, the higher the fiber density of the filter element. The better the compression performance, the better the quality of the PP cotton filter. We can judge by feel, the firmer the feel, the better the compression performance. Fourth: Look at glue. The colloid of the regular filter element is good and the elasticity is good, while the rubber of the inferior filter element is soft and the texture is poor. 2. Problems that need to be paid attention to when replacing the PP cotton filter element The filter element should be replaced after long-term use. When the length of the filter element to be replaced is insufficient, it can be solved by adding a rubber pad. When placing the filter element, you should also pay attention to putting the filter element in the correct position. When twisting the filter bottle, if it cannot be twisted, do not twist it hard. Unscrew the filter bottle and put the filter element in the correct position again, so as to avoid damage to the filter element. After the filter element is installed, it must be flushed first, and then it can be connected to the following system. Generally, the flushing time should be guaranteed for more than 5 minutes. In fact, there is also a question of when the filter element should be replaced. There is no specific standard. The use time of the filter element will depend on the water quality. Generally, it is 6-8 months, but it is best not to exceed 1 year. We choose one After a good PP filter element, it is our operation problem. Correct installation and replacement of the filter element can ensure the normal operation of the filter element. The PP cotton filter element has a uniform and dense aperture, and the highest filtration precision can reach 1m. It is mainly used to filter out impurities larger than 1m in tap water. In addition, the filtration process of the PP cotton filter element is because the PP cotton filter element belongs to the first-stage filter element of the water purifier. More than 80% of the impurities will be filtered out at this stage, and the more impurities are filtered, the easier the filter element will be blocked. Therefore, the life of the PP cotton filter element is very short. The area with poor water quality may need to replace the filter element in more than two months, and the area with better water quality will not exceed six months at most. Therefore, if you buy a household water purifier with a PP cotton filter element, in order to avoid secondary pollution of the water purifier and affect the filtering effect of the filter element, it is recommended that you replace the filter element every 3-6 months.
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