This specific blend of PTFE (Polytetrafluoroethylene) reinforced with 23% Carbon and 2% Graphite is an industry workhorse for high-performance seals. While standard "virgin" PTFE is great for chemical resistance, it is relatively soft and can "flow" or deform under pressure.
Adding Carbon and Graphite transforms it into a much tougher, more reliable material. Here is why this specific ratio is so effective:
Superior Wear Resistance - Virgin PTFE wears down quickly in dynamic applications. The 23% Carbon reinforcement drastically increases the material's hardness and resistance to abrasion. This allows the seal to maintain its shape and edge even in high-speed or high-pressure environments, significantly extending the service life of the part.
Low Friction & Self-Lubrication - The 2% Graphite acts as a dry lubricant. While Carbon provides the "strength," Graphite provides the "slickness."
It reduces "stiction" (the jerky motion when a seal starts moving).
It allows the seal to run efficiently in dry or non-lubricated environments where oil or grease isn't an option.
Thermal & Electrical Conductivity - Carbon-filled PTFE handles heat much better than standard plastic seals.
Heat Dissipation: The Carbon and Graphite help pull heat away from the friction surface, preventing the seal from overheating and failing.
Anti-Static: Because Carbon is conductive, these seals help bleed off static electricity, which is critical in certain chemical or fuel handling applications to prevent sparking.
High Load-Bearing Capacity - Pure PTFE tends to "creep" (slowly deform) under a heavy load. The 23% Carbon filler acts like a skeletal structure, allowing the seal to withstand much higher mechanical loads without squeezing out of the seal groove.
Technical Note: This material is particularly excellent for water hydraulics or applications involving non-lubricated gases, as it doesn't rely on external oil to stay slick.
While Carbon-Graphite and PTFE Bronze-Filled are popular fillers for PTFE seals, they serve very different operational needs. Carbon-Graphite is the go-to for chemical resistance and dry running, whereas Bronze is the industry standard for high-load hydraulic applications.
Choose Carbon-Graphite (23%/2%) for general industrial machinery, chemical processing, or any application where lubrication might be sparse. Choose Bronze-filled (40%) specifically for high-pressure hydraulic cylinders and heavy-duty mechanical equipment where the fluid is oil-based.
If you have questions about PTFE or its filler options and what will work best for your application, please give us a call at 770-389-0501.
