In the demanding world of industrial sealing and fluid transfer, selecting the right material is paramount. PTFE Tubes, crafted from Polytetrafluoroethylene, stand as a superior solution for applications where chemical resistance, thermal stability, and non-stick properties are non-negotiable. At Kaxite Sealing, we engineer our PTFE tubing to meet the highest standards of performance and durability, providing reliable solutions for industries ranging from chemical processing and pharmaceuticals to food & beverage and semiconductor manufacturing. Our commitment to precision manufacturing ensures that every meter of tubing delivers consistent, leak-free performance under extreme conditions.
Understanding the specifications of PTFE tubing is crucial for proper application selection. Below are the core parameters that define the performance and suitability of our products.
Kaxite Sealing offers a comprehensive range of sizes. Our standard tubing is available in various inner diameters (ID), outer diameters (OD), and wall thicknesses (WT) to suit diverse pressure and flow requirements. Custom sizes are available upon request.
| Inner Diameter (ID) mm (inch) | Outer Diameter (OD) mm (inch) | Wall Thickness (WT) mm (inch) | Pressure Rating (approx. at 20°C) | Common Application |
|---|---|---|---|---|
| 1.0 mm (0.039") | 2.0 mm (0.079") | 0.5 mm (0.020") | High | Precision instrumentation, medical devices |
| 3.0 mm (0.118") | 5.0 mm (0.197") | 1.0 mm (0.039") | Medium-High | Laboratory equipment, analytical systems |
| 6.0 mm (0.236") | 10.0 mm (0.394") | 2.0 mm (0.079") | Medium | Chemical transfer, fluid handling |
| 12.0 mm (0.472") | 18.0 mm (0.709") | 3.0 mm (0.118") | Medium | Industrial process lines, hydraulic lines |
| 25.0 mm (0.984") | 32.0 mm (1.260") | 3.5 mm (0.138") | Medium-Low | Ducting, agricultural spray lines |
| 50.0 mm (1.969") | 60.0 mm (2.362") | 5.0 mm (0.197") | Low | Exhaust ducting, large bore transfer |
| Property | Test Method | Typical Value | Unit |
|---|---|---|---|
| Tensile Strength | ASTM D638 | 25 - 35 | MPa |
| Elongation at Break | ASTM D638 | 300 - 500 | % |
| Durometer Hardness | ASTM D2240 (Shore D) | 50 - 65 | - |
| Linear Expansion Coefficient | ASTM D696 | 12 x 10-5 | cm/cm/°C |
| Thermal Conductivity | ASTM C177 | 0.25 | W/(m·K) |
| Water Absorption | ASTM D570 | < 0.01 | % |
Q: What are the primary advantages of using PTFE tubes over rubber or metal tubing?
A: PTFE tubes from Kaxite Sealing offer unparalleled chemical inertness, resisting almost all aggressive media. They operate across an extreme temperature range (-200°C to +260°C) where rubber fails and metals may corrode. Their ultra-smooth, non-stick interior minimizes pressure drop, prevents clogging, and allows for easy cleaning. They are also excellent electrical insulators and require no plasticizers, eliminating the risk of leaching or contamination.
Q: Can Kaxite Sealing PTFE tubing be used for high-purity applications like in the pharmaceutical or semiconductor industry?
A: Absolutely. Our tubing is manufactured from 100% virgin PTFE resin in controlled environments to minimize particulate generation. The inherent purity of PTFE, combined with our meticulous processing, makes it ideal for ultra-pure water systems, WFI (Water for Injection) lines, chemical distribution in semiconductor fabs, and sensitive fluid handling where contamination is a critical concern. We can provide certificates of material analysis and compliance upon request.
Q: How do I select the correct wall thickness for my pressure application?
A> Wall thickness is critical for pressure containment. Thinner walls (e.g., 0.5-1mm) are suitable for low-pressure vacuum or instrumentation lines. Medium walls (1-3mm) handle most industrial fluid transfer at moderate pressures. Thicker walls (3-5mm+) are for applications involving higher pressures, abrasion, or requiring enhanced structural rigidity. Our engineering team at Kaxite Sealing can assist in calculating the required wall thickness based on your system's operating pressure, temperature, and safety factor requirements.
Q: Is PTFE tubing flexible? Can it be bent and routed easily?
A: Standard PTFE tubing is semi-flexible. It can be bent to a minimum bend radius, typically 4-5 times the outer diameter, without kinking. For applications requiring tight bends or constant flexing, Kaxite Sealing offers specially engineered convoluted (corrugated) PTFE hose or heat-set (formed) bendable tubing that retains a specific shape. The choice depends on the dynamic needs of your system.
Q: What are the recommended methods for joining and connecting PTFE tubes?
A: Several reliable methods exist. For permanent, leak-proof joints, flaring with a ferrule and compression nut (e.g., ISO, JIC, NPT fittings) is most common. Push-to-connect fittings work well for quick assembly in low-pressure systems. For a fully integrated system, plastic or metal barbed fittings with hose clamps can be used, though this may be less robust. Fusion welding is also an option for creating seamless lengths. It's vital to use compatible fittings made of materials like stainless steel or PP/PVDF that match the chemical resistance of the PTFE tube.
Q: How does Kaxite Sealing ensure the quality and consistency of its PTFE tubes?
A: Quality is integral to our manufacturing process at Kaxite Sealing. We start with premium-grade raw materials from certified suppliers. Our extrusion process is precisely controlled for dimensions, density, and sintering. Every production batch undergoes rigorous quality checks, including dimensional verification with laser micrometers, pressure testing samples, and visual inspection for flaws. We maintain traceability throughout the process and adhere to strict ISO 9001 quality management principles.
Q: Are there any limitations or precautions when using PTFE tubes?
A: While PTFE is exceptionally robust, considerations include its susceptibility to permeation by certain gases (though less than many polymers) and its tendency to cold flow (creep) under sustained mechanical load, which must be accounted for in clamp or fitting design. It is also not suitable for use with molten alkali metals or fluorine under extreme conditions. Always ensure the tubing is properly supported and not exposed to sharp edges or excessive tensile stress.
Q: Can these tubes be customized for specific OEM applications?
A: Yes, customization is a core strength of Kaxite Sealing. Beyond standard sizes, we specialize in producing PTFE tubes with custom OD/ID combinations, specific lengths, cut pieces, colored stripes for coding, printing/marking, and special packaging (coiled, on reels, etc.). We work closely with OEM engineers to develop tubing solutions that integrate seamlessly into their final products, meeting exact performance and logistical requirements.
