Stopper for sealing gas pipe lines, has gasket and two bodies pressed against each other by clamping bolt, where one of bodies is provided with peripheral groove for receiving expandable gasket
摘要
<p>The stopper (6) has a gasket and two bodies pressed against each other by a clamping bolt. One of the bodies is provided with a peripheral groove for receiving an expandable gasket. A third body expandable by deformation is inserted between the bodies. All three bodies are formed by panels. The expandable body is manufactured from sheet metal and has a spherical shape with a central hole for inserting the clamping bolt.</p>
