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How to choose the filter screen for bag filter?

2021-05-08

When the differential pressure of the bag filter reaches a preset value, the automatic cleaning process will start. During this time, the water supply continues to flow, the cleaning valve opens, the water pressure in the cleaning chamber and suction unit is greatly reduced, and the filter cartridge and suction port pass through. The pressure difference between the suction tube and the clean chamber creates suction through the suction nozzle, creating a suction process.

When the accuracy of the bag filter screen is not accurate, the filtration effect is greatly reduced and impurities are not removed cleanly. Only filters with sufficient precision can achieve the filtration goal. The accuracy of wedge mesh and perforated mesh can be customized, and companies should use customization directly when choosing.


When choosing a bag filter screen, make sure you choose a higher quality product. Take wedge-shaped mesh as an example. When choosing, you can observe whether the surface is smooth or not. Obviously uneven filters are of bad quality. The scraper will not be able to finish when the scraper is running. Check whether the gap of the filter is uniform and the precision of the filter is not high. Check the thickness of the filter, wedge mesh is thin and has a short service life.

At the same time, the electric motor drives the suction tube in an axial, spiral motion. The combined axial and rotary motion of the suction cleaner cleans the entire inner surface of the screen. The entire rinsing process takes only a few tens of seconds. The drain valve closes at the end of the cleaning. The filter starts to be prepared for the next rinsing cycle.


Accurate coverage, flexible flow control and small footprint. Electromechanical integration. Conventional filters have now been replaced. However, when selecting, please pay attention to the size of the flow, the concentration of suspended solids and the size of the inlet pressure. If the concentration of suspended solids is high, pretreatment must be performed before. The inlet pressure should not be less than 3 kg.

Currently, the main types of bag filter mesh available on the market include V-shaped wedge mesh and O-shaped perforated mesh. Although both types of filters have relatively high filtration accuracy, they are still very different. The V-shaped wedge screen has a smooth surface and 30 micron filtration accuracy, and is suitable for filtering liquids of various viscosities. Wear-resistant, suitable for scraper type self-cleaning filters. Perforated mesh, with higher accuracy up to 10 microns. However, porous mesh is suitable for self-cleaning filters because of its uneven surface. Porous mesh cannot filter high viscosity liquids and is only suitable for filtering water or liquids with viscosity close to water.