| 摘要 |
<p>The invention relates to a shut-off valve having a housing (1), having a valve seat (V) arranged in the housing (1) and having a shut-off flap (2) which controls the valve seat (V), which shut-off flap is mounted in a rotatable, in particular doubly eccentric manner in the housing (1), wherein a sealing ring (6) is arranged, in particular so as to be axially adjustable, in the housing (1), and a sealing device (D) is arranged in the region of the valve seat (V), which sealing device is formed by two sealing elements (10a, 10b) which are spaced apart in the throughflow direction (5) and between which is formed an annular chamber (15) which is designed as a blocking and bleed device and which can be charged with a blocking medium via a blocking medium supply. In order to increase the operational reliability of a shut-off valve of said type with little structural outlay, it is proposed according to the invention that the shut-off valve is provided with a pressure measurement device (25) by means of which the pressure prevailing in the annular chamber (15) of the blocking and bleed device can be detected, wherein the pressure measurement device (30) is connected to the annular chamber (15) independently of the blocking medium supply.</p> |
