Hydraulic systems demand sealing components that can withstand extreme pressure, rapid cycling, and aggressive fluids. Our carbon powder PTFE tube for hydraulic applications is engineered for these conditions. As a dedicated 25% carbon powder PTFE tube for sealing supplier, we reinforce PTFE with uniformly dispersed carbon to prevent deformation and leakage. The carbon powder filled PTFE tubing offers excellent extrusion resistance, while the fine carbon PTFE tube high wear grade excels in abrasive environments. Working directly with a specialized 25% carbon PTFE tube manufacturer ensures tight tolerances and consistent lot-to-lot performance. Hydraulic cylinder rebuilders and OEMs choose carbon-filled PTFE tubing because it bridges the gap between soft virgin PTFE and brittle engineering plastics. The carbon additive increases thermal conductivity by a factor of three, allowing the tube to dissipate heat from high-speed rod movement. This is critical for telescopic cylinders, injection molding clamp cylinders, and offshore hydraulic systems where seal failure leads to costly downtime.
The Carbon Powder PTFE Tube for Hydraulic Systems is produced from virgin PTFE resin compounded with 25% carbon powder by weight. This material retains PTFE’s unmatched chemical compatibility with hydraulic oils, water-glycol fluids, and phosphate esters while adding dimensional stability and load-bearing capacity under high compressive loads. The tube exhibits a coefficient of friction of 0.08–0.12 against polished steel, reducing stick-slip in cylinder rods and valve spools. It is available as extruded stock or machined parts in outside diameters from 6 mm to 300 mm, inside diameters from 3 mm to 250 mm, and wall thicknesses from 1.5 mm to 25 mm. Standard length is 1000 mm with custom lengths available. Operating temperature ranges from -30°C to +260°C, and the material withstands peak pressures up to 60 MPa when used with proper backup rings. The black carbon color also improves heat dissipation and hides wear debris in hydraulic power units. Each tube is stress-relieved after extrusion and precision ground or skived to final dimensions. Surface roughness is controlled below Ra 1.6 µm to support reliable lip-seal contact. For hydraulic applications requiring electrical conductivity, the same carbon loading provides surface resistivity in the range of 10^3–10^6 ohms/sq, preventing static charge accumulation in fuel and chemical transfer lines. Custom profiles include split bushings, flanged sleeves, and step-cut wear rings machined from solid carbon powder PTFE tube stock.
Key Features
Technical Parameters
| Property | Value / Range | Test Method |
|---|---|---|
| Carbon content | 25% by weight | ASTM D4745 |
| Density | 2.08–2.15 g/cm³ | ASTM D792 |
| Tensile strength | 2,500–3,000 psi (17.2–20.7 MPa) | ASTM D4894 |
| Elongation at break | 120–180% | ASTM D4894 |
| Hardness | 62–66 Shore D | ASTM D2240 |
| Friction coefficient (dynamic) | 0.08–0.12 | ASTM D1894 |
| Operating temperature | -30°C to +260°C (-22°F to +500°F) | — |
| Maximum pressure (with backup) | 60 MPa (8,700 psi) | — |
| Inside diameter tolerance | ±0.05 mm for ID ≤ 50 mm | ISO 1302 |
| Outside diameter tolerance | ±0.10 mm for OD ≤ 100 mm | ISO 1302 |
| Wall thickness range | 1.5–25 mm | — |
| Color | Black | — |
