| 摘要 |
The drive device is coupled to the part of the switching shaft (12) for the line closure projecting from the tap housing, for allowing the switching shaft to be rotated for movement of the line closure between closed and open positions. The drive motor is provided by a pressurized air turbine (24) or a pressurized air motor, coupled to the switching shaft via a conversion gearing (18), the switching shaft or an attached component (14) cooperating with a source detecting the switching shaft position, connected to a control for cut-out of the pressurized air turbine or motor when the end position of the switching shaft is reached.
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