The service life of the filter element is greatly affected by the cleanliness of the filter medium, and the maintenance of the filter element is also important. When the pressure difference between the two ends of the filter exceeds a certain value, it is necessary to clean or replace the filter element. Cleaning should be carried out in a clean environment to prevent secondary pollution. High pressure backwashing can be used for cleaning, or water backwashing can be used, but the filter element should be dried in a timely manner to prevent rusting of the support frame. Before reinstalling the filter element, be sure to check the position and wear of the sealing ring. If there are any problems, replace them in a timely manner.