Sealing systems
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PTFE-40% Bronze
(T110-BR40, Ecoflon 3)
A polytetrafluoroethylene plastomer with a metallic filler for self-sealing, slip, pressure and support rings, self-sealing chevron rings and guide rings. Due to its filler content, it has very good endurance parameters, small cold creep in relation to pure PTFE, while maintaining very good chemical resistance.
| Norm | Unit | Value | |
|---|---|---|---|
| Density | DIN 53479 | g/cm³ | 3,05-3,12 |
| Hardness | ASTM D2240 | Shore D | 62-67 |
| Yield strength | ASTM D4894 | N/mm² | 23-28 |
| Elongation at break | ASTM D4894 | % | 200-250 |
| Coefficient of friction (dyn) | ASTM D1894 | mi | 0,13 |
| Minimum operation temperature | °C | -200 | |
| Maximum operation temperature | °C | +260 | |
| Grindability index (K) | ASTM D3702 |
cm³min 10ˉ.../kgml |
9-13 |
| Comp. resistance. at 1% deform. | ASTM D695... | N/mm² | 7-9 |
| Coefficient of thermal expansion (lin) 25-100 °C | ASTM D695... | 10ˉ.../°C | 10-11,5 |
