What is a pure water purifier? Cartridge system mechanism and replacement guidelines [Basic Knowledge]
A cartridge pure water purifier that allows you to obtain pure water simply by connecting it to a water supply. This explains the mechanism inside the container and the reason why the amount of water obtained before replacement varies depending on the source water.
A pure water system is a device that obtains pure water by passing tap water through ion exchange resin, removing dissolved ions from the water. The cartridge type uses a tank made of FRP (fiber-reinforced plastic) filled with resin, which is connected to the water supply piping or hose. When the resin is no longer effective, the entire container or the resin inside is replaced. ■ What is inside the container? Pure water cartridges often contain a "mixed bed" of resin that holds both cations and anions. This allows both cations and anions to be exchanged in a single container, enabling the direct production of water with low electrical conductivity from tap water. ■ In what situations is it used? 1. Finishing touches for car washing: Preventing water spots after drying 2. Supplementary water for humidifiers and similar devices 3. Water for cleaning glassware and other equipment ■ Removing the source of white marks Tap water contains dissolved minerals such as calcium, which leave white marks (ion deposits) when the moisture evaporates. Pure water is used in car washing because it is finished with water that has had these mineral components removed. Please feel free to consult us first.
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■Is the replacement timing not determined by the "amount of water"? There is a limit to the total amount of ions that a single cartridge's resin can hold. Therefore, the amount of pure water that can be obtained is influenced by the amount of ions present in the source water. For a 10L resin cartridge, the estimated amount of water that can be collected when the source water's electrical conductivity is 200μS/cm is about 1,900L. If the source water has double the ions, the amount collected will be roughly halved. ■Look at the electrical conductivity for replacement signals! Attach a conductivity meter to the outlet of the treated water, and replace it when the set value is exceeded. There are also systems where the lamp color changes when it exceeds 1μS/cm, indicating that it's time for a replacement. ■Does excessive flow reduce purity? The appropriate flow rate range is determined according to the amount of resin. If the flow rate is too fast, there may not be enough time for the resin and water to interact, resulting in water being dispensed without sufficient ion exchange. ■Do not store the collected pure water Pure water is prone to quality degradation as it absorbs carbon dioxide and other substances when exposed to air. It is important to collect only the necessary amount each time and use it up quickly.
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■When connecting to well water? Well water may contain iron and manganese derived from geological layers. For raw water suitable for pure water systems, guidelines suggest keeping iron below 0.3 mg/L and manganese below 0.05 mg/L. The levels of iron and manganese are the same as the water quality standards for tap water. Some products also maintain residual chlorine below 1 mg/L. If the values exceed these guidelines, consider pre-treatment such as iron and manganese removal. ■Is pre-treatment necessary even for tap water?! Even with tap water, deterioration of pipes can lead to rust contamination or high levels of residual chlorine, which may shorten the lifespan of the resin. Therefore, placing a cartridge filter before the pure water system is effective. ■There are two ways to replace the resin Resin replacement can be done by self-refilling or by sending the entire container back to the supplier to have new resin filled and returned. ■What if the usage is high? In locations with high usage, a regenerable pure water system may be suitable. Torii offers consultations for resin replacement, regular maintenance, and updates for pure water systems. Please feel free to reach out for inquiries.
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Since our founding, we have continued to provide flexible services with the motto of accurately supplying a diverse range of products that respond to changes in the times and the diversification of consumer needs, tailored to various applications and requirements. With the corporate slogan "Chemical Engineering Partner," we, as a group of experts in chemical technology, actively discover ideas to solve our customers' problems from advanced technologies both domestically and internationally, and propose them.
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