Patent ID: 6520209
Filing Date: 2003-02-18
Classification: F16K,Y10T

Abstract:
Device in a valve (1) comprising a valve housing (2) with inlet (3) and outlet (4) preferably arranged directly opposite one another on opposite sides of the housing (2) and in the valve housing (2), 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 the 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; 11â€²) being arranged in the passage (6), and the inlet, at the commencement of the valve opening movement, connecting solely with one chamber, which via wall openings and intermediate chambers connects with the chamber opposite and the latter with the outlet, with more and more chambers and finally all chambers being made to connect with the inlet and the outlet respectively during the successive opening sequence of the valve, characterised in that the device comprises at least one pair of intersecting walls (8a, 8b; 9a, 9b, 10a, 10b), which are located in the passage (6), so that two opposing chambers (K1,K4;k1,k9) situated nearest to the inlet and the outlet 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 open and the closed position and vice-versa, so that a flow of medium flowing into the chamber (K1; k1) lying nearest to the inlet by way of the openings (11; 11â€²) in the walls (8a, 8b; 9a, 9b, 10a, 10b) is divided up into a plurality of medium flows, which are combined in the chamber (K4; k9) situated nearest to the outlet, resulting in a pressure gradient.