| 摘要 |
In an embodiment of the present invention, a valve seal (26) for a ball valve includes a ball (14) configured to mate with a tail piece (22), an annular seat ring (28) to facilitate the mating of the ball (14) with the tail piece (22), the seat ring (28) having an angled wall having a first groove for accommodating a first seal (36) and a second groove for accommodating a second seal (38), the first seal (36) having a different Young's modulus from the second seal (38). |
