| 摘要 |
A butterfly valve includes a valve housing (1) having a passage (2) for a fluid medium flowing therethrough along a central axis (3). A rotary throttle disc (4) is mounted in the passage (2) and has a stem (5) for rotation of the disc (4). A flow attenuating member (10) is mounted in the passage (2) to cover a portion of a cross-section of the passage (2) and has a plurality of identical conduits (12) for reducing dynamic torque, noise level and vibrations caused by fluid flowing though the valve. To improve the reduction,the conduits (12) form an angle (alpha) with the central axis (3) to make the portion of fluid medium that exits from them have a direction that differs from the flow direction of the fluid medium that passes beside the conduits (12).The conduits (12) direct the flow there through substantially toward the flow along the central axis (3). |
