As a specialized 10% graphite PTFE tube supplier, we manufacture high-performance tubing engineered for demanding dynamic sealing and bushing applications. Our 10% graphite PTFE tube for reciprocating motion delivers consistent low-friction performance in linear actuators, valve stems, and pneumatic cylinders. The graphite filled PTFE tubing low friction formulation reduces stick-slip and wear, extending service intervals in high-cycle operations. By choosing a PTFE tube with graphite filler, you gain improved thermal conductivity and dimensional stability under load, which is critical for heat dissipation in rotating equipment. Engineers specifying low torque PTFE tube graphite filled designs benefit from lower breakaway force and smoother operation in precision instruments and automotive components.
The 10% Graphite PTFE Tube is produced from 100% virgin PTFE resin compounded with precisely 10% by weight graphite powder, ensuring a uniform dispersion that enhances mechanical strength and reduces cold flow under compressive stress. This material is ideal for reciprocating shafts, piston seals, compressor guide rings, and low-speed bearings operating in dry or marginally lubricated environments. The graphite filler also provides up to 25% better wear resistance and 40% higher thermal conductivity than unfilled PTFE, while maintaining the chemical inertness and broad temperature tolerance that PTFE is known for. Key dimensional options include:
Typical physical and mechanical properties are summarized below:
| Property | Test Method | Typical Value |
|---|---|---|
| Specific gravity | ASTM D792 | 2.10 – 2.20 g/cm³ |
| Tensile strength | ASTM D4894 | ≥ 20 MPa |
| Elongation at break | ASTM D4894 | ≥ 180% |
| Hardness | ASTM D2240 | 55 – 65 Shore D |
| Dynamic friction coefficient | ASTM D1894 | 0.08 – 0.12 |
| Thermal conductivity | ASTM C177 | 0.45 – 0.55 W/m·K |
| Service temperature range | - | -200°C to +260°C |
| Compressive strength (1% deformation) | ASTM D695 | ≥ 8 MPa |
| Water absorption (24h) | ASTM D570 | < 0.01% |
| Volume resistivity | ASTM D257 | 10⁶ – 10⁸ ohm·cm |
Common applications include hydraulic cylinder seals, compressor piston rings, valve packing, and low-torque bushings in automotive and industrial equipment. The material performs reliably in dry running conditions and is compatible with most chemicals, solvents, and hydraulic fluids. For food-contact or medical applications, select grades are available with FDA-compliant raw materials and documented traceability. The low coefficient of friction reduces energy consumption and heat generation in continuous motion systems, while its self-lubricating nature eliminates the need for external grease or oil in many applications. This makes it particularly suited for cleanroom, food processing, and chemical environments where contamination from lubricants is unacceptable. Additionally, the graphite filler improves the tube's resistance to permeation by gases and vapors, extending service life in pneumatic seals and valve stems. For applications requiring low torque and precise motion control, the static friction coefficient is only slightly higher than dynamic, minimizing the risk of stick-slip during start-up. This characteristic is especially valuable in servo-driven actuators and medical devices where smooth, predictable movement is critical. Our manufacturing process follows ISO 9001:2015 quality management standards, with full material traceability from raw resin to finished tube. We offer custom compounding services to adjust graphite content from 5% to 15% by weight, as well as hybrid fillers such as carbon fiber, bronze, or MoS₂ for specialized wear and conductivity requirements. Standard tubes are supplied with clean, burr-free ends and are individually wrapped to prevent contamination. We recommend storing the tubing in a cool, dry environment away from direct sunlight to maintain dimensional stability. For high-precision assemblies, finish machining of inner and outer surfaces can be performed to achieve tolerances as tight as ±0.025 mm.
