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Premium DP4B Flanged Washers: Advanced Bronze-Backed PTFE & Polymer Fibre Solutions
Maximize the efficiency of your high-duty hydraulic systems with our DP4B Series Flanged Washers. While standard steel-backed bushings are prone to corrosion in sensitive fluid environments, the DP4B is engineered with a 100% Bronze Backing. This specialized material matrix, combined with a lead-free PTFE and Polymer Fibre mixture, delivers superior wear resistance and thermal conductivity specifically for oil-lubricated, high-performance applications.
Why Choose DP4B Flanged Washers?
The primary advantage of the DP4B series is its Superior Corrosion Resistance and Low Friction Coefficient under lubricated conditions. By replacing the standard steel shell with high-grade bronze, these washers provide:
- Exceptional Wear Resistance: Designed mainly for use under lubricated conditions, performing with excellent durability and a low static/dynamic friction coefficient.
- Maintenance-Free Dry Running Capability: While optimized for oil, the lead-free PTFE/Polymer layer allows for dry running with a low wear rate and good sliding characteristics.
- Total Corrosion Immunity: The bronze backing offers very good corrosion resistance and excellent heat dissipation, outperforming carbon steel in harsh fluid environments.
- Dimensional Integrity: Features high chemical resistance and reduced swelling due to lower water absorption, ensuring precise clearances in hydraulic assemblies.
Advanced Triple-Layer Material Structure
Our DP4B washers utilize a specialized sintering process to bond self-lubricating polymers to a non-ferrous foundation:
- PTFE/Polymer Fibres Mixture (0.01 ~0.03mm): A lead-free bearing layer that creates an excellent initial transfer film, forming an oxide-type solid lubricant to protect mating surfaces.
- Sintered Bronze Powder (0.20~0.35mm): Acts as a critical reservoir for the PTFE mixture while providing maximum thermal conductivity away from the bearing interface.
- Bronze Backing: Provides exceptional high load-carrying capacity and superior corrosion resistance compared to standard steel-backed series.
Typical Applications
DP4B washers are specifically developed for high-duty, oil-lubricated hydraulic and automotive applications:
- Hydraulics & Fluid Power: Gear pumps, motors, and both axial and radial piston pumps and motors.
- Automotive Suspension: Suspension struts and guide bushings for high-performance shock absorbers.
- Industrial Cylinders: High-load hydraulic cylinders requiring maintenance-free operation and low friction.
- Versatile Motion: Optimized for both rotary and oscillating movements in heavy-duty machinery.
Technical Specifications & Customization
|
Treatment / Type |
Best For |
Functional Benefit |
|
Bronze Backing |
Corrosive / Fluid Environments |
Exceptional corrosion resistance and superior heat dissipation compared to steel. |
|
PTFE / Polymer Fibres |
High Wear Resistance |
Lead-free layer provides low static and dynamic friction coefficients. |
|
Sintered Bronze Layer |
Thermal Management |
Maximizes heat transfer (0.20 ~0.35mm thickness) to prevent thermal fatigue. |
|
Flanged Configuration |
Multi-Directional Loads |
Manages axial thrust while the sleeve handles radial movement in complex assemblies. |
|
Oil Lubricated Use |
High-Duty Hydraulics |
Specifically designed to perform excellently under lubricated conditions. |
Expert Guidance & Technical Support
If you have questions regarding the performance differences between DP4 (Steel-Backed) and DP4B (Bronze-Backed) for your specific application, we are here to help. Please submit your inquiry via our website contact form or email us directly at [email protected] for a detailed technical consultation.
