| 摘要 |
<p>The joint has a flexible ring (3) jointly and concentrically mounted with a hard ring (1) and with sealing lips (5, 7) that axially extend beyond the hard ring and on both sides of the hard ring. The flexible ring having a maintenance lip (9) is placed in the hard ring, where the hard ring is made of a metal alloy such as brass e.g. CW614N type brass or CW617N type brass, which respectively conform to EN12164or N12165standards. The flexible ring is made of an elastomer material e.g. acrylonitrile-butadiene rubber, which conforms to EN 549standard.</p> |
