What are the main water filters filter membrane types - 【 3 m filter.

Look from the filtering technology consists of nanofiltration, ultrafiltration, sodium filter, reverse osmosis technology. Among them:

1, microfiltration ( MF) : general filtration precision in 0. 1 - 50 microns, such as common all kinds of PP filters, activated carbon filter, ceramic filter and so on all belong to the category of microfiltration, for simple coarse filter, filter the impurities in the water and sediment, rust and other large particles, can't remove the water of bacteria, viruses, organic matter, heavy metal ions and other harmful substances. Usually can not clean, as disposable filter material, often need to change.

　　1) PP cotton filter: high not only commonly used for coarse filtration, removal of water and sediment, rust and other large particulate matter.

　　2) Activated carbon, granular activated carbon filter is widely sold devices in the United States, it is enough to eliminate the peculiar smell in the water and chlorine, but can not effectively remove the water all the toxic chemicals and other pollutants.

　　3) Ceramic filter: small filtering precision can be 0. 1 micrometers can be used in addition to bacteria. But usually small flow rate, not easy to clean. Ultrafiltration (

2, UF) : filtration precision in 0. 001 - 0. 1 micron, belong to one of six new and high technology in the 21st century. Is a kind of using membrane separation technology of pressure difference, can filter out the rust in the water, sediment, suspended solids, colloid, bacteria, viruses, macromolecular organic matter and other harmful substances, and can retain some mineral elements beneficial to human body. Is the core component in the process of synthesis of mineral water, mountain spring. Water in the ultrafiltration process of recovery rate is as high as 95% above. And the realization of easy to rinse with back flush, not easy jam, relatively long service life. The filtering precision of 0. 01 micron ultrafiltration membrane for water rate and the effect of filtering effect is good and is widely used.

3, sodium filter ( NF) : filtration precision between ultrafiltration and reverse osmosis, desalination rate is lower than the reverse osmosis, also is a kind of need electricity, pressurized membrane separation technology, water recovery rate is low. Commonly used in industrial pure water manufacturing.

4, reverse osmosis ( RO) : the filtering precision can reach 0. About 0001 microns, is in the early '60 s developed a high precision using the method of differential pressure of the membrane separation technology. Can filter out the almost all impurities in the water, Including harmful and beneficial) , only to let water molecules through, commonly used in industrial ultrapure water, the manufacture of pharmaceutical ultrapure water and purified water. Reverse osmosis technology need to pressure, with electricity, water utilization ratio is low, not suitable for a large number of domestic and drinking water purification.

common water purification machine on the market at present has the following kinds:

PP filter water purification machine: monocular full of all kinds of PP filter water purification machines, generally low price, but the filter is easy to jam, often need to change, and the filtration precision is not high, only used for the initial filtering of water.

activated carbon filter: can eliminate the peculiar smell in the water and chlorine, but can not effectively remove the toxic chemicals and other pollutants in the water.

pure ultrafiltration water purification machine: can effectively remove the water and sediment, rust, suspended solids, colloid, bacteria, viruses, macromolecular organic matter and other harmful substances, but does not remove the chlorine in water, heavy metal ions, different color and odor.

reverse osmosis pure water machine: completely remove the beneficial and harmful substances in water, the output is softening of desalting water, but do not accord with standard of healthy water. Need to electricity, pressurized water utilization is low ( Waste water rather than pure water. ) , purify the cost is high, the flow rate is small.