| 摘要 |
The shutoff device consists of a housing (14) inserted in the conduit, in which a movable shutter (32) is mounted for oscillation about a horizontal axis (33) in the housing (14) and comprising a closing member (35) returned into a position of closing a channel (28) by a counterweight (36). A manometer (43) enables the pressure inside the housing (14) to be measured. The shutoff device, wholly passive in operation, can be employed in particular in a conduit for guiding a measurement probe employed in a pressurized water nuclear reactor.
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