Air filter cylinder material made of stainless steel 304,316,316 L; filter material generally hydrophobic polytetrafluoroethylene or polypropylene microporous membrane filter, designed and manufactured according to GMP standards, efficient, energy saving, safe, reliable, widely used in fermentation Air, injection with air, with the gas purification and various gas filtration. Distilled water, pharmaceutical, food, beer and other industries sterilization. The highest precision of 0.22um gas filtration means that all kinds of bacteria and bacteria above 0.22um reach 100% filtration, the medium thickness is only 0.8mm, the pore diameter is stable, the gas resistance is small and the regeneration is convenient. Can also be used for sterilization of steam filtration. This filter can completely solve the air pollution problems, but also improve the quality of disinfection and sterilization, so as to achieve GMP requirements.