The function of hydraulic filter is to filter various impurities in hydraulic system. The main sources are the mechanical impurities remaining in the hydraulic system after cleaning, such as water rust, cast sand, welding slag, iron chips, coatings, paint skins and cotton chips, and impurities that enter the hydraulic system externally. Our many hydraulic filter material is glass fiber.which is an excellent inorganic nonmetallic material. It has the characteristics of good insulation, strong heat resistance, good corrosion resistance and high mechanical strength. Filter effect is much higher than ordinary filter paper. Our hydraulic filter used for Caterpillar(CAT), Donaldson, Baldwin, Fleetguard, Komatsu, VOLVO, JCB, CHN, MANN and so on.