The UDH type piston rod seal is a single-acting hydraulic rod seal engineered for reciprocating motion of hydraulic cylinder piston rods. Adopting a special asymmetrical lip design, the UDH rod seal features pressure self-energizing sealing performance. When hydraulic pressure increases, the sealing lip tightly clings to the rod surface to prevent medium leakage.
Fabricated from high-grade polyurethane, the UDH piston rod seal boasts remarkable wear resistance, good tear strength and low friction. Its optimized profile offers reliable anti-extrusion capability under high pressure, resisting extrusion damage in the seal groove during continuous reciprocating operation. It effectively isolates hydraulic oil and keeps dust, debris and moisture out of the cylinder. The seal works stably at working pressure up to 35 MPa, operating temperature between -30℃ and 100℃.
Compatible with mineral hydraulic oils and most common hydraulic fluids, UDH hydraulic rod seals are widely applied in excavators, construction machinery, injection molding machines and general industrial hydraulic cylinders. It matches standard gland dimensions for easy installation and direct replacement. With low leakage rate and extended service life, the UDH piston rod seal provides a durable and cost-effective sealing solution for heavy-duty hydraulic systems.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
