| 摘要 |
<p>A flange-type or screw-type connecting piece having a bearing face, an annular groove, made in the bearing face, and a resiliently yielding sealing ring disposed in the groove, and about 20-35% of the total volume of the sealing ring protruding beyond the bearing face, the groove having in cross-section either an arcuate or a flat bottom, the diameter or the width and depth of the groove being such that the major part of the sealing ring in its relaxed state corresponds with the form of the groove and is tightly enclosed by the wall or the walls of the groove, wherein both the wall portions of the groove directly adjoining the bearing face seen in cross-section, are running parallel to one another and spaced from the sealing ring, so that two free spaces are formed between the wall portions adjoining the bearing face and the sealing ring.</p> |
