| 摘要 |
<p>A valve assembly (300) including a valve housing having (301) a fluid passageway (302) extending through it. A valve member (325) is located within the inner chamber portion (307) and is movable between a closed position in which the fluid passageway is blocked, and an open position in which the fluid passageway is not blocked. First and second substantially annular retainer ring assemblies (440, 441) are also located within the inner chamber portion (307), and rotatably position the valve member (325) within the inner chamber portion (308). The first and second retainer ring (440, 441) assemblies provide first and second fluid seals (370, 375) between the valve member (325) and the inner chamber surface (308) at the first and second ends of the inner chamber portion (307) respectively. The first and second retainer ring assemblies (440, 441) each include a floating retainer ring and a plurality of sealing members (370376). The floating retainer rings (440, 441) are movable relative to the valve member (325), the inner chamber surface (308), and the inlet and outlet walls.</p> |
