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Filter element is a high-efficiency filter device used in many industries, but it is not a durable product. It will cause blockage during long-term use. At this time, it is necessary to replace the filter element in time to ensure the normal operation of the machine. . Want to extend the life of the filter in the selection of filters is to pay attention to the three indicators.
When selecting a filter, the three performance parameters of the filter must be considered, namely filtration accuracy, filter size and filtration ratio.
It is clear from the definition that the filtration accuracy has the dual meaning of filtration efficiency and particle size. Only the particle size is not specified, and the filtration efficiency is not comparable. The filtration efficiency is not comparable. Only the filtration efficiency is emphasized, and the particle size is not specified. The filtration efficiency is meaningless, and the filtration precision is not present. Since the filtering accuracy includes the dual meaning of size and efficiency, technical parameters with the dual meaning of size and efficiency are needed as the quantitative evaluation standard. The filtration ratio (β value) has such an attribute, and the β value has been widely used as an evaluation index of filtration accuracy in the world.
The concept and use of the filtration ratio (β) provides good conditions for the uniform measurement of filtration accuracy. However, due to the different knowledge and technical level of different countries and different manufacturers in different periods, the filtration accuracy used. There are new inconsistencies in the quantitative assessment criteria. For example, when assessing the filtration accuracy, some require β>75, some require β>100, and some require β>200, etc., the quantitative evaluation standard is not uniform, and the performance index of filtration accuracy is lost again. Comparability, which brings new confusion to the use of filtering accuracy.
In the scientific sense, the quantitative evaluation criteria (β value) of filtration accuracy should be uniform, but it is completely unrealistic. The β value is high, and the performance of many filter materials may not be achieved; the β value is lower, which is not conducive to the development and application of high-performance filter materials. To solve this contradiction, the filtering accuracy should be graded according to the level of p value, which is conducive to solving the contradiction that it is difficult or low, and also presents the substantial difference in filter performance to the user.
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