Built for the most demanding hydraulic cylinder environments, this Bronze Filled PTFE Piston Seal Assembly combines the chemical inertness of PTFE with the exceptional load-bearing and thermal conductivity properties of bronze filler. The result is a high-performance piston seal engineered for heavy-duty industrial, mobile, and hydraulic press applications where elevated pressures, side loads, and heat dissipation are critical concerns.
Key Benefits
Outstanding Load Capacity – Bronze reinforcement dramatically increases compressive strength and resistance to extrusion under high-pressure conditions
Superior Thermal Conductivity – Bronze filler dissipates heat away from the sealing interface, extending seal life in high-cycle or high-speed applications
Excellent Wear Resistance – Ideal for applications with metal-to-metal contact risk or abrasive contamination in the hydraulic fluid
Low Friction Performance – Retains PTFE's inherently low coefficient of friction for smooth, stick-slip-free piston travel
Dimensional Stability – Minimizes cold flow and creep under sustained static or dynamic loads
Broad Chemical Compatibility – Resistant to petroleum-based hydraulic oils, water-glycol fluids, and most industrial hydraulic media
Typical Applications
Heavy-duty hydraulic cylinders (double-acting and single-acting)
Industrial presses, injection molding, and metal forming equipment
Construction, mining, and forestry machinery
High-pressure hydraulic actuators and steering systems
Applications with elevated side loads or off-axis forces on the piston
Material Specifications
Seal Material: Bronze Filled PTFE (typically 40–60% bronze by weight)
Energizer/O-Ring: NBR, FKM, or EPDM (specify when ordering)
Hardness: Shore D 65–70 (bronze-filled compound)
Temperature Range: -65°F to +500°F (-54°C to +260°C)
Color: Bronze/Gold
Order by bore diameter and rod diameter, or provide your cylinder specifications for a custom fit. Contact us for volume pricing on production quantities.
