Magnetic filters are composed of strong magnetic materials with high coercivity and a blocking filter screen, with an adsorption force ten times that of ordinary magnetic materials. They have the ability to adsorb micrometer level ferromagnetic pollutants under instantaneous liquid flow impact or high flow rate conditions, and can overcome the re adsorption of ferromagnetic pollutants under high-speed and large impact, thereby avoiding the jamming of hydraulic components or wear caused by friction, prolonging the service life of hydraulic components and systems, and enhancing the reliability of hydraulic systems. Its center is a cylindrical magnet, with a cover made of non-magnetic materials on the outside. Several iron rings are wrapped around the cover, and the iron rings are connected by copper bars, with a certain gap between each iron ring. When ferromagnetic impurities in the hydraulic medium pass through the gap between the iron rings, they are adsorbed on the iron rings, thereby playing a filtering role.

For easy cleaning, the iron ring is divided into two halves. When impurities block the gap, the iron ring can be removed for cleaning, and then installed for repeated use. Magnetic filter elements can also be combined with other filter materials to form a combination filter element, which is used for paper filter elements on the return oil circuit. The filter paper filter element is composed of an inner and outer cylinder, and an oil filter paper sandwiched in the middle. The inner and outer tubes are rolled from thin steel plates, with many oil passing circular holes punched on the plates; Fold the filter paper into a star shape to increase the flow area. The central pull rod of the filter element is equipped with a magnetic filter element composed of many magnetic rings and nylon spacers.