FEV series all fluorine filter cartridge adopts PVDF cage and ECTFE support, and the high porosity PTFE membrane is welded and sealed by high-temperature hot-melt technology. The all fluorine structure provides this product with excellent chemical compatibility and cleanliness. The FEVG hydeophobic type can be widely used in the filtration and purification of a variety of strong corrosive solutions. The FEVL hydrophilic type can be widely used in the filtration and purification of a wide range of high surface tension and strong corrosive solutions. The hydrophilic filter medium can be used without pre-wetting, which greatly improves the convenience of using.