| 摘要 |
<p>A rotating union (10 min ) including a seal assembly (15) having a rotating seal member (23) carried by a rotor (13 min ) and a non-rotating seal member (24). A fluid actuated mechanism (42) is provided which urges the non-rotating seal member (24) into or out of engagement with the rotating seal member in dependence on the presence or absence, respectively, of fluid pressure through the union.</p> |
