The UDR type piston rod seal is a compact single-acting hydraulic rod seal specially developed for hydraulic cylinder rod sealing. Built with integrated sealing lip and anti-extrusion structure, this UDR seal replaces traditional multi-piece sealing assemblies, simplifying installation while saving gland space for hydraulic systems.
Manufactured from premium PU or NBR raw materials, the UDR piston rod seal delivers outstanding wear resistance, low friction and reliable anti-extrusion performance under high pressure. It effectively blocks hydraulic oil leakage along the reciprocating piston rod and prevents external dust and contaminants from entering the cylinder interior. The self-energizing asymmetrical lip maintains stable sealing effect across variable working pressure, supporting continuous operation up to 35 MPa and working temperature from -30℃ to 100℃.
Suitable for mineral hydraulic oil and most common hydraulic fluids, UDR rod seals are widely applied in excavators, construction machinery, injection molding machines and general industrial hydraulic cylinders. It fits standard gland dimensions, enabling direct replacement and retrofit for old cylinder equipment without extra machining. With fewer assembly parts, reduced maintenance cost and longer service life, UDR piston rod seal becomes a cost-effective dynamic sealing choice for heavy-duty hydraulic applications.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
