Rod seals

Hydraulic rod seals are critical components in hydraulic cylinders, preventing fluid leakage and maintaining pressure by sealing the gap between the moving piston rod and the cylinder head. They ensure efficient operation, protect against contaminants, and reduce wear. Common materials include polyurethane (PU) and nitrile rubber (NBR), chosen for durability and compatibility with hydraulic fluids. Popular designs like U-cups, lip seals, and rod wipers (scrapers) cater to different pressure, speed, and environmental conditions. Proper selection and maintenance are essential to prevent leaks, extend service life, and ensure system reliability.