Ultrapure Water Filtration

Ultra-pure water (UPW) is usually considered to be water with resistivity greater than 18MΩ.cm or close to 18.3MΩ.cm at 25oC, in which the conductive medium is almost completely removed, and the non-dissociated colloidal substances, gases and organic matter are removed to a very low degree. Now the ultra-pure water preparation adopts pre-treatment, electrodialysis (EDI) ultraviolet sterilization, reverse osmosis (RO), ion exchange and a variety of membrane filtration technologies. The process can be roughly divided into three steps: pre-treatment,desalination, and Fine Filtration.

1. Pre-treatment: including multi-media filtration, activated carbon filtration, softener, filtration to remove 1-20μm particles in water and remove organic matter and free chlorine.

2. Desalination: including reverse osmosis (RO), electrodialysis (EDI) and other methods to remove most of the ions in water. For example, the desalination rate of electrodeionizaion (EDI) can reach 95% or more. Reverse osmosis (RO) has a desalination rate of 98%, and can remove 99% of bacterial particles and organic matter dissolved in water.

3. Fine Filtration: the role is mainly to prevent fine particles and broken resin residue from entering the finished water. The deionized water is easy to cause secondary pollution by the overflow pipelines and equipment, resulting in the increase of the conductivity of deionized water and the unqualified water quality. Through 0.1μm precision filter, the particles that may remain in the deionized water are filtered, to ensure the purity of the terminal water quality.

Master Filtration, liquid filtration manufacturer, provides customers with stable & reliable filter cartridge products and offer perfect liquid separation & purification solutions, help client solve filtration related issues.