4251766 SEAL DUST For HITACHI ZX870-5G 6WG1T

The main function of the dust sealing ring is to prevent external dust, sand, water and other pollutants from entering the hydraulic cylinder, and to protect the internal seals and equipment from damage. The dust-proof seal ring is usually installed on the piston rod, and scrapes the dirt on the surface of the piston rod through its sharp lip structure, while keeping the oil film from being destroyed, which is conducive to the lubrication of the seal. The working principle of the dust-proof seal is based on its special lip structure and material characteristics. It utilizes a dry friction mode of operation, requiring the material to have extremely high wear resistance and low compression permanent deformation properties. The design of the dust-proof seal should ensure that its lip has sufficient contact force against the piston rod to effectively scrape dirt off the surface while keeping the oil film undamaged, thereby protecting the seal and equipment.