Carbon powder filled PTFE tubing is a high-performance fluoropolymer product engineered for applications where unfilled PTFE would deform under load or fail prematurely from abrasive wear. By incorporating fine carbon powder into virgin PTFE resin, manufacturers achieve a material with significantly lower creep, higher thermal conductivity, and improved dimensional stability while retaining the chemical resistance and low friction properties of PTFE. This tubing is commonly used in valve packing, pump shafts, compressor seals, and hydraulic cylinder guide rings. For sealing applications that demand long-term tightness and resistance to extrusion, our 25% carbon powder PTFE tube for sealing grade provides the necessary compressive strength and surface hardness. In high-cycle or high-speed operations, the fine carbon PTFE tube high wear variant minimizes abrasion and maintains a smooth mating surface. As a dedicated 25% carbon PTFE tube manufacturer, we control particle size distribution, filler content, and sintering profiles to achieve consistent mechanical properties batch after batch. Hydraulic equipment subjected to high-pressure pulsation and contaminated fluids relies on the carbon powder PTFE tube for hydraulic range, which offers excellent sealing, low friction, and resistance to hydrolysis and oxidation.
The carbon powder filled PTFE tubing is available in several standard formulations and dimensional configurations. The default filler loading is 25% carbon powder by weight, which provides the best balance of wear resistance, deformation resistance, and machinability. Depending on the application, other filler percentages and combinations with graphite or glass fiber can be supplied. Key material properties of the standard 25% carbon powder grade are listed below.
| Dimension Parameter | Standard Range | Typical Tolerance |
|---|---|---|
| Inside diameter (ID) | 2 mm to 200 mm | ±0.05 mm up to 25 mm; ±0.10 mm over 25 mm |
| Outside diameter (OD) | 4 mm to 220 mm | ±0.10 mm |
| Wall thickness | 0.5 mm to 20 mm | ±0.05 mm |
| Standard length | 1000 mm, 2000 mm, 3000 mm | +5 mm / -0 mm |
| Concentricity | ≥ 95% between ID and OD | |
| Surface finish (machined) | Ra 0.4 – 0.8 µm | |
Machining and fabrication services are offered for OEM and maintenance customers, including cutting to length, drilling, grooving, and custom turning. The material can be bonded to metal housings or used as a liner inside composite tubes. Typical lead times for stock sizes are 3-5 working days, while custom diameters and formulations may require 10-15 working days. All products are traceable to raw material batch records and can be supplied with material certificates, dimensional reports, and RoHS compliance documentation. For vacuum or cleanroom environments, the tubing is cleaned and double-bagged prior to shipment. Standard packaging is designed to prevent ovality and surface scratches during transport and storage.
