| 摘要 |
<p>A check valve in which a stop pin assembly is situated so as to prevent the movement of a flapper beyond a predetermined position. In a preferred embodiment the check valve has two flappers with the stop pin assembly situated therebetween to prevent either one of them from pivoting beyond an essentially vertical position. The stop pin assembly is configured such that it can be inserted and locked in place when the check valve is inserted within a valve body that contains the check valve. The stop pin assembly can comprise three elements including a central portion and first and second end portions, although the stop pin assembly could instead comprise a single element. The stop pin assembly is inserted between two holders and in a preferred embodiment is rotatable to a locking position where it is affixed in place by fasteners.</p> |
