| 摘要 |
<p>In a sealing device comprising a sealing member (24) consisting mainly of a plastics material having high chemical and thermal resistance and high wearability and being formed with at least one closed, endless sealing surface (25, 25a), an annular spring (23) arranged in the sealing member (24) close to the sealing surface (25, 25a) and exerting the spring pressure in the direction towards the sealing surface (25, 25a) for energizing the seal is protected against contact with the medium, for which sealing should be effected by being enclosed by the material in the sealing member (24) on all sides. The enclosure may be provided either by encapsulating the spring (23) in the plastics material during manufacture of the sealing member (24), or by arranging the spring in an open incision formed for this purpose in a finished member of the plastics material and subsequent closure of the incision with the spring by means of a covering layer, which is inseparably connected with the plastics material. The sealing device may be designed as a usual sealing ring, as well as an integrated seal piston.</p> |
