| 摘要 |
A butterfly valve having a valve body is provided. The butterfly valve includes a valve disk assembly rotationally coupled to the valve body. The valve disk assembly has a disk member with a first surface disposed about a periphery having a first diameter and a second surface offset from the first surface. A seal ring is arranged adjacent the first surface, the seal ring having a first outer surface with a second diameter, wherein the second diameter is larger than the first diameter. A retainer is coupled to the second surface adjacent the seal ring opposite the first surface. The retainer has inner surface arranged to radially constraining the seal ring on the disk member. |
