| 摘要 |
<p>PURPOSE:To increase the passing speed of a fluid and to increase the capacity of a valve by inclining the opening side edges of plural windows of a cage in a fixed direction and forming a path extending from an inlet to the cage, with the center thereof shifted sideways from the axis of the cage. CONSTITUTION:A valve body 1 has the upper and lower partition chambers 3, 4 partitioned by a partition wall 2, and an inlet 5a and an outlet 5b are formed on both sides of the respective partition chambers 3, 4. A cage 7 having a plurality of windows 6a-6d on the peripheral wall thereof is fixed on the partition wall 2 by a cover 8. A plug 10 supported on a valve shaft 9 is inserted in the cage 7, and the open areas of the windows 6a-6d are increased and decreased by moving up and down the plug 10 to control the flow rate. In this case, the opening side edges 11 of the windows 6a-6d parallel to the axis are inclined in a fixed direction with respect to a plane which includes the axis of the cage 7 and is extended radially. An inlet path 12 is formed in the partition chamber 3, with the center thereof shifted sideways at a distance D from the axis of the cage 7.</p> |
