The filter material is mainly composed of a filter layer and a support layer. Filter materials are mainly divided into: glass fiber paper (imported paper, domestic paper), plant fiber paper, stainless steel mesh, copper mesh, synthetic fiber felt, water filter materials, etc. Supporting layer materials are mainly: galvanized mesh, stainless steel mesh, plant fiber paper, copper mesh and so on.

The filter layer is used to ensure that the system plays the required filtration role and reaches its specified cleanliness. Its structural features:
1. Select different filter materials according to different materials and accuracy requirements.
2. The most important filtration effect of the filter material.
3. The strength of single-layer filter material is generally not high, and support layer and protective layer are required when necessary.
4. There are two main working methods: folding and wrapping.

The supporting layer is characterized by the metal mesh wire diameter is thicker, the number of mesh per unit area is less, the strength is higher, and the filter material is protected. It mainly acts on the supporting filter material, so that the filter material does not deform and damage under the pressure difference. At the same time, the process shape of the filter material is maintained, so that the filter material can contact the working medium evenly and fully, so as to improve the filtration effect.