... hydraulic element and hydraulic systems.Hydraulic seal is one of the key conditions that a hydraulic system can work normally. ... hydraulic seals where there is a risk of the O-Ring Xiamen Yiho Polytek Co.,Ltd. has advanced CNC turning equipment and ... hydraulic piston head and guide sleeve ,acting within and outside the lift. Production DetailsItem:Hydraulic SealMaterial:NBR,HNBR,XNBR,EPDM,SIL ...