| 摘要 |
<p>PURPOSE: To improve sealing effect by arranging a sealing element between a hollow stem tube that is connected with a plug closure member, and a guide tube that guides this hollow stem tube. CONSTITUTION: A sealing element 40 for sealing the gap between a hollow stem tube 5 and a guide tube 7 in the plug valve includes a keeping element 50 for keeping the guide liner 52 in a suitable position between the hollow stem tube 5 and the guide tube 7. A packing pressure element 56 is movably arranged between the hollow stem tube 5 and a fixed flange 90, and the bolt 64 auxiliaryly keeps the tubular packing pressure element 56 in a suitable position, and regulates the position of the tubular packing pressure element 56.</p> |
