| 摘要 |
<p>The valve has a hollow valve body (1) comprising annular closing seats (6, 7) moved relative to each other along a displacement direction (I-I), in an inner housing (2). A movable shutter (5) moves between closing and opening positions in which one of closing units (8, 9) is in contact with and spaced from the seats. The unit (9) has an elastically flexible annular radial lip (11) supported against the seat (7) in the closing position. The lip is opened toward upstream relative to a direction of fluid flowing from a fluid inlet passage (3) toward a fluid outlet passage (4).</p> |
