| 摘要 |
<p>The essential feature of a new lateral seal system for a butterfly valve (1), of which the pivotable valve disc (3) carries a sealing ring (5) mounted with freedom of radial movement, positioned to interact with a conical seat (4) and secured by a flange (7), is an annular gasket (9) composed of a corrugated external portion (9'') deformable in the radial direction and fastened by one edge to the sealing ring, and an internal portion (9') clamped between and in fluid-tight contact with the disc and flange.</p> |
