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Select ultra-pure water system components scientifically to improve water purity. As the use of pure water becomes increasingly widespread, the methods for producing pure water have also diversified. The competition in the water treatment market is intensifying, with product performance continuously improving. With the rapid development of water treatment technologies, users should make reasonable choices based on their specific needs and financial conditions, so as to meet the requirement for pure water for production while reducing investment costs. Selection of accessories for ultra-pure water equipment Ultra-pure water equipment primarily utilizes membrane separation technology and EDI technology, which are the advanced processes currently used for producing ultra-pure water. The original processing technique combines membrane elements with mixed-bed technology. Compared to mixed-bed technology, the EDI module is a relatively expensive solution; it is suitable for companies with sufficient financial resources and high requirements regarding water purity. There is a variety of membrane elements, and it is necessary to choose them appropriately for pure water production; different membrane elements serve different functions, with filter membranes being commonly used in ultra-pure water systems. The types of filtration membranes include ultrafiltration membranes, nanofiltration membranes, microfiltration membranes, etc., and the choice should be based on the requirements for pure water. Finally, the disinfection process must also be selected based on the user’s specific requirements, such as ultraviolet disinfection technology, ozone disinfection technology, and chlorine dioxide-based disinfection methods.