| 摘要 |
<p>The actuating device of the valve (12) has an actuating extension (31) which is connected to the valve-closing element (16) via a connecting section (36). The connecting section is designed in such a way that it acts as a predetermined breaking point before impermissibly high forces can act on the valve-closing element, causing leaks. By means of a particular arrangement of the working surfaces of the actuating extension, which extend parallel to the axis of rotation, the valve can be operated by various tools. Towards the top, the actuating extension (31) has bevelled surfaces which serve to deflect impact forces. The actuating device is particularly advantageous for valves made of plastic installed in underground gas distribution pipes. <IMAGE></p> |
