1. Air filter The contaminated air is cleaned to the state required for production and living, that is, the air is cleaned to a certain degree.
2. Liquid filter The contaminated liquid is cleaned to the state required for production and living, that is, the liquid is cleaned to a certain degree.
3. Network filter By setting to block spam, the information on the computer screen is as close as possible to the requirements. The principle of absorption separates light of different colors
4. Light filter to absorb some unwanted light. The above should be a mesh filter. In fact, there are many kinds of filters, such as laminated filters, sand filters, carbon filters, etc. The main principle is to use the pore size of the filter medium to intercept substances smaller than the pore size of the medium. Of course, some filter media also have special effects such as adsorption. Most of the filter backwashing is not so troublesome, as long as the water is introduced into the reverse backwashing filter from the end of the filtered water to achieve a good backwashing effect. This type of valve should be installed horizontally in the pipeline.
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