Take the five-stage filter element combination as an example:
Primary filtration: The current water purifiers on the market generally use 5μm PP cotton as the filter element to remove rust, sand, suspended solids and other large particles. Rough filtration is generally replaced every 3-6 months.
Secondary filtration: The granular activated carbon filter (UDF) integrates adsorption, filtration and interception, and catalysis. It can effectively remove pesticides, pesticide residues, organic solvents and other industrial chemical pollution. It can also effectively remove organic matter, residual chlorine and other radioactive substances in the water, and has the effect of decolorization and deodorization. The general use period is 3-6 months.
Three-stage filtration: sintered activated carbon is used as the filter element (CTO) (some manufacturers use PP cotton as the filter element) to deeply absorb different colors, odors, and residual chlorine in the water, and filter out fine impurities. Used in the third stage of the water purifier, it also protects the main filter element of the water purifier. The service life is generally 3-6 months.
Four-stage filtration: one main filter element (if you need to understand the filtration principle of various filter elements, please go to the headline number space to see the professional introduction of various water purifiers)
1. Ultrafiltration membrane filter element: It is recommended to replace it every 2 to 3 years.
2. Nanofiltration membrane filter element: It is recommended to replace it every 2 years.
3. RO reverse osmosis membrane filter element: It is recommended to replace it once every two years.
4. High-density activated carbon filter element: It is recommended to replace it once a year.
Five-stage filtration: The post activated carbon filter element (T33) is the last process of the water purifier, which can further absorb the different colors and odors in the water, increase the oxygen content of the purified water, and mainly improve the taste of the water. Especially for water purifiers using pressure storage buckets, it is recommended to use silver-loaded activated carbon filter material for the rear activated carbon, which can effectively absorb the peculiar smell generated by the storage bucket, and can sterilize and inhibit bacteria to ensure the safety of drinking water. The recommended service life is 12 months.
The activated carbon water purifier uses ultraviolet lamps to kill fine particles and microorganisms. It is recommended to replace it once a year.