Pump rotors operate under continuous radial loads, frequent thermal cycling, and exposure to fluids that can rapidly degrade bronze, carbon, or unfilled polymer bearings. An aromatic polyester PTFE sleeve bearing solves many of these problems with excellent chemical inertness and a low coefficient of friction. For rotors that must survive dry starts, abrasive media, or higher shaft speeds, a high wear Ekonol PTFE bushing is the next logical upgrade because the aromatic polyester filler hardens the PTFE matrix and reduces cold flow. As a focused 20% Ekonol PTFE bushing manufacturer, we produce this rotor-grade bushing with controlled filler dispersion, tight machining tolerances, and consistent batch-to-batch hardness. While an Ekonol filled PTFE bushing for seal is often used in slow-moving or static sealing applications, the rotor version is specifically optimized for continuous rotation, higher PV conditions, and long maintenance intervals.
The 20% Ekonol PTFE bushing for pump rotor is made from virgin PTFE reinforced with 20% Ekonol aromatic polyester powder by weight. This formulation delivers a measurable improvement in compressive strength and wear resistance compared with standard virgin PTFE, while retaining the self-lubricating properties that make PTFE bearings ideal for pump shafts that cannot be grease-lubricated. In laboratory wear tests against stainless steel, the 20% Ekonol grade shows a wear factor up to 10 times lower than unfilled PTFE under 1 MPa load. The bushing is suitable for centrifugal pumps, gear pumps, lobe pumps, progressive cavity pumps, and sealless magnetic drive pumps. It performs well in water, brine, fuels, hydraulic oils, solvents, dilute acids, and alkaline cleaning fluids.
| Parameter | Specification |
|---|---|
| PTFE matrix | Virgin PTFE |
| Filler type | Ekonol aromatic polyester |
| Filler content | 20% by weight |
| Density | 2.05 – 2.15 g/cm³ |
| Hardness | Shore D 60 – 65 |
| Tensile strength | 15 – 20 MPa |
| Elongation at break | 180 – 220% |
| Compressive strength | 20 – 28 MPa |
| Coefficient of friction (dry) | 0.05 – 0.10 |
| Maximum service temperature | 260°C (500°F) |
| Minimum service temperature | -200°C (-328°F) |
| Water absorption | <0.01% |
| Thermal conductivity | 0.24 W/m·K |
| Color | Tan / beige |
| PV limit (dry) | Up to 1.8 MPa·m/s |
| Typical bore range | 6 mm – 250 mm |
The 20% Ekonol PTFE bushing for pump rotor can be machined as a solid wear ring, a flanged journal bearing, or a split bushing for assemblies that cannot be installed over the shaft end. Standard inner diameters are honed to a smooth surface finish of Ra 0.8 µm or better, reducing initial wear-in time. For high-temperature pump rotors, the material retains its mechanical properties far better than UHMWPE or nylon, and it does not outgas or contaminate process fluids. The 20% Ekonol PTFE bushing for pump rotor is also resistant to creep at elevated temperature, making it a reliable choice for ANSI and API pump retrofits. Custom sizes, helical lubrication grooves, and anti-rotation notches are available for OEM and retrofit projects.
