What is the grade and classification of filter cotton

It is understood that the classification at home and abroad is different. According to domestic standards, it can be divided into initial effect, moderate effect, and high efficiency effect. However, according to European standards, they are G1, G2, G3, G4, F5, F6, F7, F8, etc.

According to domestic standards:

Coarse filter cotton. This is the basic layer and priority layer for filtering. Usually used in air supply systems. The pre filtration effect under high dust exposure is very good.

Medium efficiency filter cotton. If dust particles exceeding 1 μ M can be used, the scope of use of this product is limited. Generally used for the main filter after initial filtration.

High filtration cotton. The requirements for filter cotton are relatively high, so the materials used are also relatively good. Due to the high environmental requirements of filter cotton, the production process is also relatively good. At present, many have been used in hospitals or laboratories, and after use, they have indeed met people's requirements.