8P-8796 8P8796 PU PTFE Composite Piston Seal Rings for Wheel Scraper Hydraulic Cylinder Repair 10U 11SU 11U

1. Quick Details of  seal 8P-8796:

2. 8P-8796 picture:

4. Service part number :

5. FAQ

Q: What core advantages does the three-piece composite structure bring to wheel scraper hydraulic cylinder sealing?
A: Wheel scrapers work on uneven ground with long-term high load and frequent reciprocating cylinder movement. The PU main ring has outstanding wear resistance and pressure resistance, and will not deform under continuous hydraulic impact. The PTFE auxiliary ring greatly reduces friction between the seal and cylinder inner wall, lowers operating noise and avoids scratching the cylinder barrel. The built-in NBR elastic ring provides lasting radial tension to keep the seal tightly fitted to the cylinder wall and prevent internal oil leakage inside the cylinder.

Q: What color and structural features do each component of this piston seal ring have?
A: The outer PU main sealing ring is orange, with double-lip sealing structure and smooth matte surface. The middle PTFE anti-extrusion ring is milky white thin flat ring, which can be fully embedded into the reserved groove of PU ring. The inner NBR elastic energizer is solid black round rubber ring with uniform elasticity. All three parts are pre-assembled as a whole, which simplifies on-site installation without separate matching.

Q: What pressure and temperature range can this piston seal ring adapt to?
A: This composite piston seal ring can bear continuous working pressure up to 410bar, and fits the temperature range of -34°C to +120°C. It can run stably in low-temperature outdoor construction in winter and long-hour high-load operation in summer without lip peeling or elastic attenuation failure.

Q: What equipment hidden faults will inferior piston seal rings trigger for wheel scraper hydraulic systems?
A: Low-cost piston seal rings adopt recycled inferior PU without PTFE protective layer. They wear rapidly after reciprocating friction, leading to serious internal oil leakage of the cylinder. The cylinder will show weak lifting power, slow response and obvious shaking during operation. The worn debris will scratch the cylinder barrel inner wall, causing expensive barrel replacement cost and long equipment shutdown losses.

Q: What standardized installation specifications should operators follow to extend the service life of the piston seal ring?
A: First, thoroughly clean the piston groove and cylinder inner wall to remove metal particles and old seal residues. Second, lubricate the whole seal ring with clean hydraulic oil before installation, thick grease is prohibited. Third, use special installation tools to push the seal evenly into the piston groove, avoid twisting or scratching the PU sealing lip. Fourth, confirm the PTFE ring is fully embedded without warping before loading the piston into the cylinder barrel.

6. Exhibition and Wearhous

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