The application of standard five layer sintered mesh in chromatography equipment is very mature, mostly in the form of a disc directly fixed between flanges and sealed with a sealing gasket; There are also various forms of directly welding sintered mesh discs onto flanges and then fixing them. Function: Used in chromatography equipment, it contains micro powder particles such as silica gel, activated carbon, alumina, ion exchange resin, ion exchange fibers, etc. It is used to purify liquid materials, or adsorb useless or harmful components, or adsorb useful components, ultimately achieving the purpose of purification. The sintering mesh plays a role in supporting the smooth passage of micro powder particles and liquid materials that need to be purified. The sintered mesh is mostly in the form of circular sheets with a thickness of 1.7mm; the accuracy is mostly 150 mesh, 200 mesh, and 400 mesh.