According to the professional terms commonly used in the liquid filter bag industry, generally only screen filter bags or wire mesh filter bags can express accuracy by mesh number, while non-woven fabrics are used for filter bags such as needle-punched felt or liquids made of melt-blown materials. Filter bags usually do not express precision by mesh number. Screens and wire mesh filter bags cannot achieve the accuracy of 1 micron.

Since the filtration efficiency is divided into two types: nominal precision and absolute precision, if you use a 1-micron nominal precision filter bag, in fact, it cannot filter out all particles above 1 micron, even if it is an absolute precision filter bag. It is only required that its filtration efficiency reaches more than 99.9%, because no liquid filter bag can say that its filtration efficiency reaches 100%.

Therefore, when choosing the specification and model of the filter bag, you must communicate with the filter bag manufacturer clearly about your specific requirements, such as whether to filter all the impurity particles above 1 micron, or only need to intercept most of the 1 micron impurity particles. This is crucial to the selection of the general size of the filter bag.

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