| 摘要 |
The invention relates to a system for driving a fluid circulation valve, which system is controlled by a bipolar electric signal having a high level and a low level, comprising a duct for the circulation of a fluid, a shut-off member, a first actuator moving said shut-off member, a return element able to bring the shut-off member into a safety position, a position-locking means for locking the shut-off member in a preferred activation position, a second actuator able to release said locking means, the high level of the bipolar signal allowing activation of the first actuator for moving the shut-off member into the preferred activation position and locking it in that position, the low level allowing activation of the second actuator to unlock the shut-off member and return it to the safety position under the action of the return element, and keeping the shut-off member in the safety position and in the preferred activation position being achieved without consuming electrical current. |
