| 摘要 |
<p>The valve has a double seat and a leak direction, and two valve plates movable independently of an in relation to each other. On opening, the first plate bears after traveling a set distance against the second one and forms with it a chamber, from which a leakage port leads to the outside. An adjusting mechanism (2') is coupled to the first plate (2) moving it to an open position in the direction of the second one (3), and the first plate has in addition a second adjusting mechanism opening it, but preventing it coming to bear against the second one. The latter has an independent adjusting mechanism (14) functioning in opposition to the closing spring, and opening it in such a manner that the outlet cross-section is smaller than that of the leakage port (16).</p> |
