Now filter industry growing, the user is also constantly growing in continuous use at the same time, a maintenance has become an essential step, HYDAC filter element in the long-term use, or install, the process of movingwill inevitably damaged, so timely job protection measures to prevent the generation of the bump phenomenon. Is in use for some time, the filter internal inevitably squeeze a lot of dust or impurities material, this is the maintenance of a long-term task that needs to be done. Especially long-term dust extrusion, will seriously affect the cleanliness of the air supply, serious when you need to replace the filter.