Design description: The SRU features an asymmetrical double lip piston seal constructon that provides the most suitable sealing for light and medium load applicatons. when the secondary seal is used with the SRT support gasket, it can be applied to heavy duty seals. The double lip design improves the stability of the seal. Equipped with a V-shaped NBR rubberring to ensure that the main sealing lip and the piston rod maintain a certain pressing force under low pressure or no pressure. Especially recommended for the atermarket The seals are divided into low temperatu reresistant and high temperature resistant, Low temperature resistant for conventonal products, injecton molded with Jiu Long high performance polyurethane U1 material, easy to install and low temperature resistant