What are the filtration stages of PS-RO-70? What is the filtration principle at each stage?

PS-RO-70 is a highly efficient RO system consisting of 5 to 6 filtration stages, each with a unique filtration principle designed to ensure comprehensive purification of water quality. The first stage of the system is the pre-filter, which acts like a sieve and is used to remove large particles of impurities in the water, such as sediment, rust and suspended solids. The existence of this stage is to protect subsequent filter elements and RO membranes from damage, thereby extending the service life of the system.

Next is the granular activated carbon filter. The filtration principle at this stage is mainly to remove chlorine, odor, organic matter and volatile organic compounds (VOCs) in the water through the adsorption of activated carbon. Activated carbon is a highly porous material with extremely strong adsorption capacity that can effectively remove pollutants from water and improve the taste and smell of water.

The third stage is granular activated carbon/carbon block filter element. Its principle is similar to the second stage, which further removes residual chlorine, chemical pollutants and organic compounds in the water to improve the purity and taste of the water.

The RO membrane is the core component of the RO system, usually located in the fourth filtration stage. The RO membrane adopts the principle of reverse osmosis and uses high pressure to pass water through a semi-permeable membrane to separate dissolved solids, heavy metals, bacteria, viruses and other high molecular substances in the water, thereby obtaining high-purity purified water. This stage is the most critical filtration step of the RO system, ensuring a high degree of purity and safety of water quality.

The post-activated carbon filter is usually the fifth filtration stage of the system. Its function is to further remove odors, residual chlorine and organic compounds in the water, and improve the taste and clarity of the water. This stage exists to provide refreshing and purer drinking water.