| 摘要 |
1. Conical plug valve, having a tapered pin mounted in the cone seat of the housing, a seat cover connected to the housing and, situated between the large base of the tapered pin and the cover, a pressure spring, characterized in that the tapered pin (3) mounted in the cone seat (1) of the housing (2), is ended with a spherical mandrel (4) placed in the centre of the large base of the pin (3), while between the mandrel (4) and the cover (11, 11'), which is connected to the housing (2) and has a stop (12, 12') at a distance from the mandrel (4), there is a pressure spring (13, 13').<IMAGE>
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