| 摘要 |
<p>The regulating valve has a control cell which acts via a rod or a moving spring loaded vane, so as to regulate the vane according to the control requirements of the cell. A manual control of the moving element of the vane is also provided. This consists of a swinging lever arranged between the spring and the control rod of the control cell. A strip in the form of a cam can turn under the action of a return spring and cooperates with the lever. After the vane element is moved from a manually set position by the control cell, the strip cam and lever are automatically freed. The cam returns to its original position.</p> |
