In pumps, rotary compressors, and chemical processing equipment, bushing performance is often limited by friction, shaft wear, and thermal expansion. As a specialist 20% Ekonol PTFE bushing manufacturer, we machine each part from compression-molded stock to achieve predictable wear life and stable shaft clearances. The 20% Ekonol PTFE bushing for pump rotor is designed for dry-running and boundary-lubricated rotor systems, where it reduces vibration and prevents metal-to-metal contact during startup and shutdown. In continuous-duty sleeve positions, the aromatic polyester PTFE sleeve bearing offers a low coefficient of friction without the brittleness of ceramic or the shaft scoring of filled metals. For abrasive slurry, high-cycle, or heavily loaded pivot points, the high wear Ekonol PTFE bushing delivers extended service intervals in both linear and rotating service. When sealing integrity depends on controlled clearance and smooth actuation, the Ekonol filled PTFE bushing for seal supports O-rings, V-packings, and mechanical seal faces by reducing drag and heat generation. These precision bushings are supplied in ID sizes from 4 mm to 300 mm, with wall thickness options to suit existing housing bores and shaft diameters.
20% Ekonol PTFE bushing is manufactured from a homogeneous blend of virgin PTFE resin and 20% aromatic polyester filler. The filler improves compressive strength, hardness, and wear resistance while retaining the chemical inertness and low friction of PTFE. It is suitable for dry, water-lubricated, oil-lubricated, and aggressive media conditions. Typical applications include pump rotor journals, mixer shafts, valve stems, seal supports, and reciprocating compressor wear bands.
| Property | Test Method | Typical Value |
|---|---|---|
| Composition | Internal | 20% Ekonol aromatic polyester + 80% PTFE |
| Density | ASTM D792 | 1.92–1.98 g/cm³ |
| Hardness | ASTM D2240 | 68–72 Shore D |
| Tensile strength | ASTM D4894 | 15–19 MPa |
| Elongation at break | ASTM D4894 | 170–210% |
| Compressive strength | ASTM D695 | 26–30 MPa at 10% strain |
| Coefficient of friction, dry | ASTM D3702 | 0.06–0.10 |
| PV limit, dry | Internal | 1.4–1.8 MPa·m/s |
| Service temperature range | Continuous | -200°C to +260°C |
| Thermal conductivity | ASTM E1530 | 0.25–0.28 W/m·K |
| Water absorption | ASTM D570 | Less than 0.02% by weight |
| Color | Visual | Dark brown to black |
Standard stock includes metric and imperial bore diameters from 4 mm to 300 mm, with wall thicknesses from 3 mm to 25 mm and lengths up to 600 mm. Machining tolerances are held to ±0.013 mm for OD, ID, and length, and surface finishes down to Ra 0.4 µm are available for seal contact faces. Custom configurations include flanged bushings, thrust washers, split sleeves, and non-standard radial wall sections. Every production lot of 20% Ekonol PTFE bushing is verified for filler distribution, Shore D hardness, and critical dimensions before packaging.
