1. Air filter To clean the polluted air to the state required for production and life, that is, to make the air reach a certain degree of cleanliness. 2. The liquid filter can clean the contaminated liquid to the state required for production and life, that is, to make the liquid reach a certain degree of cleanliness. 3. Network filter Block spam information by setting, so that the information appearing on the computer screen meets the requirements as much as possible. The principle of same absorption separates light of different colors. 4. Light filter, 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 filters are not so troublesome to backwash, as long as clean water is introduced from one end of the filtered water to the medium in the backwash filter, a good backwashing effect can be achieved. This type of valve should generally be installed horizontally in the pipeline. The filter is a small device that removes a small amount of solid particles in the liquid, which can protect the normal operation of the device. When the fluid enters the filter cartridge with a certain size filter screen, its impurities are blocked, and the clean filtrate is discharged from the filter outlet. When cleaning is required, just take out the detachable filter cartridge and reload it after processing, so it is extremely convenient to use and maintain. Y-type filter, also known as decontamination device and filter valve, is an indispensable device in the pipeline system for conveying medium. Particles, etc. are filtered to protect the fittings on the equipment pipeline from wear and blockage, which can protect the normal operation of the equipment. When the fluid enters the filter cartridge with a certain size filter screen, its impurities are blocked, and the clean filtrate is filtered by When it needs to be cleaned, just take out the detachable filter cartridge and reload it after processing, so it is very convenient to use and maintain.