Sealing systems
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NBR
(N107-B85, Rubber, Ecorubber 1)
A popular elastomer based on acrylic nitrile butadiene, used for self-sealing and lip rings, self-sealing chevron rings, scrapers, special seals and initial compression elements. This material has a very good resistance in mineral oils, hydraulic HFA, HFB, HFC pressurised fluids.
It also has very good mechanical properties /grindability resilience/. It is not resistant to glycol-based brake fluids, HFD fluids, aromatic compounds /e.g. benzol/, esters, ketones and amines, as well as concentrated acids and bases.
| Norm | Unit | Value | |
|---|---|---|---|
| Density | DIN 53479 | g/cm³ | 1,32 |
| Hardness at 20 °C | DIN 53505 | Shore A | 85 |
| Modulus 100 | DIN 53504 | N/mm² | 10,2 |
| Yield strength | DIN 53504 | N/mm² | >17 |
| Elongation at break | DIN 53504 | % | >155 |
| Compression test* | DIN 53517 A | % | 7 |
| Compression test** | DIN 53485 | % | 9 |
| Minimum operation temperature | °C | -25 | |
| Maximum operation temperature | °C | +100 |
