| 摘要 |
<p>A valve (1) comprises a valve housing (2) with inlet (3) and outlet (4) preferably arranged directly opposite one another on opposite sides of the housing (2). In the valve housing (2) there is, between the inlet (3) and the outlet (4), a valve body (5), provided with an essentially cylindrical passage (6) and pivotally mounted in the housing (2) so that with the valve (1) in the fully open position me passage (6) together with the inlet (3) and outlet (4) lie in line with one another. Essentially plane walls, defining chambers between them and provided with through openings (11, 11') are arranged in the passage (6). At the commencement of the valve opening movement, the inlet connects solely with one chamber, which via wall openings and intermediate chambers connects with the chamber opposite and the latter with the outlet. During the successive opening sequence of me valve more and more chambers and finally all chambers are made to connect with the inlet and me outlet respectively. The device comprises at least one pair of intersecting walls (8a, 8b, 9a, 9b, lOa, lOb). These are located in the passage (6), so that two opposing chambers (K1, K4; k1, k9) situated nearest to the inlet (3) and the outlet (4) respectively lie symmetrically in relation to a centre plane, in which the central axis (6a) of the passage is situated during the rotational movement of the valve body (5) between the opened and the closed position and vice-versa.</p> |
