Precision filter (also known as security filter), the shell of the cylinder is generally made of stainless steel, and the inner part uses PP melt blown, line fired, folded, titanium filter, activated carbon filter and other tubular filter elements as filter elements. According to different filter media and design process, different filter elements are selected to meet the requirements of effluent quality. It is used for solid-liquid separation of various suspensions, and for liquid filtration with high environmental requirements and high filtration accuracy. It has a wide range of applications, and is suitable for medicine, food, chemical industry, environmental protection, water treatment and other industrial fields.