Gemü B22 Betriebsanleitung Seite 51

▶ While the valve opening is continuously selectable, these
intermediate positions are not lockable.
2. Pull up hand lever locking device 16 such that hand lever
17 can be turned.
3. When the desired end position is reached, push the hand
lever locking device 16 downwards and let it engage (only
possible if the ball valve is fully open or fully closed).
Travel stops 21a and 21b are both located at locking stop
AS.
4. If the ball valve is fully open or fully closed with the hand
lever locked in place 17, the position can be secured on
the hand lever 17 using an appropriate lock (e.g. padlock
VS) in the bolt hole B above the hand lever locking device
16.
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12 Operation
GEMÜ B22