For pump rotors, mixer shafts, and rotary seals that run with minimal lubrication, the 20% Ekonol PTFE bushing for pump rotor offers a practical upgrade over conventional PTFE and filled nylon. This aromatic polyester PTFE sleeve bearing is compounded with a 20% loading of Ekonol, a thermoplastic aromatic polyester that reduces the cold-flow behavior of PTFE while preserving its low friction. As a dedicated 20% Ekonol PTFE bushing manufacturer, we source raw resin with consistent particle size and process it under controlled molding and sintering conditions to prevent voids and filler agglomeration. The same material grade is available as an Ekonol filled PTFE bushing for seal, where dry sliding against stainless steel or ceramic shafts demands low wear and reliable startup torque. The addition of Ekonol raises compressive strength to roughly 39 MPa and increases surface hardness to 65 Shore D, making the bushing suitable for bearing pressures up to 10 MPa without permanent deformation. Unlike virgin PTFE, which creeps under continuous load, this filled grade holds its installed clearance longer, reducing vibration and protecting the shaft from abrasive scoring. The friction coefficient remains stable in the range of 0.10 to 0.18 against polished steel, which lowers breakaway torque in pump start-up and reduces heat generation in continuous duty. The material also withstands a broad range of chemicals, including aliphatic hydrocarbons, aromatic solvents, weak acids, and alkaline cleaning solutions, so it can be used in chemical transfer pumps, fuel injection systems, and industrial washing equipment. Machinability is excellent: the compound can be turned, milled, drilled, and grooved to produce flanged bushings, thrust washers, and split wear rings without delamination. Standard supply includes tubes, rods, and custom-machined parts with dimensional tolerances as tight as ±0.01 mm. For maintenance crews and OEM designers alike, this bushing delivers longer intervals between replacements and helps keep critical rotating equipment running with less downtime.
High Wear Ekonol PTFE Bushing is a wear-resistant, self-lubricating bearing component engineered for demanding pump, compressor, and valve applications. The composite combines PTFE with a fine dispersion of Ekonol aromatic polyester filler, which improves compressive strength, creep resistance, and dimensional stability without sacrificing the inherently low friction of PTFE. This means the bushing maintains a smooth sliding surface even after thousands of hours of operation under high radial loads and slow oscillating motion. The product is particularly effective in applications where external lubrication is impractical or where process fluids must not be contaminated by grease or oil. In dry-running pump rotor assemblies, the High Wear Ekonol PTFE Bushing provides a consistent start-up torque and reduces the risk of shaft seizure during periods of interrupted flow. The material’s service temperature range spans from -100°C to +200°C, allowing it to handle cryogenic liquified gases on one end and hot oil circulation on the other. Its low moisture absorption—typically below 0.03%—prevents swelling and maintains close running clearances in humid environments. Chemical resistance includes most solvents, fuels, refrigerants, and dilute acids, making the bushing a reliable choice for chemical dosing pumps and refrigeration compressors. Because the filler particles are uniformly distributed, the wear face polishes to a hard, glazed surface that resists embedding of abrasive contaminants. This glazed layer also helps protect the mating metal shaft from scoring, extending the service life of both components. High Wear Ekonol PTFE Bushing can be produced as a straight cylindrical sleeve, a flanged bearing, or a split bushing, and it can be bonded or pressed into a metallic housing for extra structural support. Standard tolerances follow ISO H7 bearing fits, with custom bore and length dimensions available to match existing shafts and gland plates. Customers can also request grooved or slotted designs to improve lubricant retention or to accommodate dust and debris in harsh field conditions. With proper installation and shaft alignment, this bushing typically provides two to three times the service life of unfilled PTFE in high-load, low-speed rotating equipment.
Key Material Specifications
| Property | Typical Value | Unit |
|---|---|---|
| Filler type and content | 20% Ekonol (aromatic polyester) | % |
| Specific gravity | 2.10 | g/cm³ |
| Tensile strength | 22 | MPa |
| Elongation at break | 3.2 | % |
| Compressive strength | 39 | MPa |
| Hardness | 65 | Shore D |
| Dynamic coefficient of friction | 0.14 | — |
| Service temperature range | -100 to +200 | °C |
| Wear factor K | 3.5 × 10⁻⁶ | mm³/N·m |
| Moisture absorption | < 0.03 | % |
