Abstract: This invention relates to a control valve which comprises a first and a second flow channel (2, 3), a valve chamber (4) and a closing member (5), from which a shaft (6) extends. A flow connection is established in the control valve through the inner part of the chamber (4). The flow connection into the chamber (4) and the one out of the chamber (4) are constricted at all openings (A1, A2, A3) when the closing member (5) is turned about the rotation axis (10) in the chamber (4).

Abstract: This invention relates to a control valve which comprises a first and a second flow channel (2, 3), a valve chamber (4) and a closing member (5), from which a shaft (6) extends. A flow connection is established in the control valve through the inner part of the chamber (4). The flow connection into the chamber (4) and the one out of the chamber (4) are constricted at all openings (A1, A2, A3) when the closing member (5) is turned about the rotation axis (10) in the chamber (4).

Abstract: A control valve comprises a valve body (1) including two flow channels (2, 2'); a cup-formed, steplessly turnable closure member (5); and a shaft (6) for turning the closure member. On the sides of the closure member there is at least one opening (14). The second flow channel (2') has in the valve body (1) an extension (10), the outer surface of which forms a surface of revolution concentric with the inner surface of the closure member (5), and which extends within the closure member. On the sides of the flow channel extension there is at least one opening (21). The opening or openings (14) of the closure member are located so that in the open position of the valve they at least partly overlap the opening or openings (21) of the flow channel extension (10). In the closed position of the valve the openings of the flow channel are covered by the closure member.

Abstract: A valve and method for adjusting the flow of a valve and for forming a turbulence in the flow. The flow is led tangentially from the inlet passage (2) into the space inside the valve body (1) in such a way that a turbulent flow is formed inside the valve body, outside the closure member. The flow volume is adjusted before the flow is brought into turbulence.