The PDU‑type wiper seal is a specialized dust‑proof sealing part designed for reciprocating piston rods of hydraulic and pneumatic cylinders. Manufactured from high‑grade polyurethane elastomer, this wiper seal possesses excellent abrasion resistance, low‑temperature flexibility and anti‑aging performance, suited for long‑term operation in harsh outdoor working environments.
Built with a precision‑optimized scraping lip, the PDU‑type wiper seal maintains close contact with the piston rod surface. As the rod retracts, it effectively scrapes off dust, mud, sand and moisture, preventing external contaminants from entering the cylinder interior. This protects main sealing assemblies and rod surfaces from abrasive scratches, avoiding premature seal damage. Its compact structure fits standard seal grooves, supporting quick installation without special tools, and tolerates minor shaft eccentricity during cyclic movements.
Widely used in construction machinery, forklift trucks, agricultural equipment and general‑purpose industrial cylinders, PDU‑type wiper seals play a vital protective role in hydraulic systems. Proper groove processing and qualified rod surface roughness will extend the service cycle significantly. As a reliable dust exclusion solution, it reduces hydraulic system failure rates and cuts overall equipment maintenance costs.
Original text from: Hydraulic and Pneumatic Seals https://www.bszzseal.com/
