6.
Commissioning
6.1.
End stops in gearbox
The internal end stops limit the swing angle. They protect the valve against overload.
End stop setting is performed by the valve manufacturer prior to installing the valve
into the pipework.
In the factory, end stops are set to a swing angle of 90° unless indicated otherwise
in the order.
Exposed, rotating parts (discs/balls) at the valve!
Pinching and damage at the valve.
→
End stops should be set by suitably qualified personnel only.
→
Set end stops as to ensure that they are NOT approached during normal motor
operation.
Information
The setting sequence depends on the valve:
●
Recommendation for butterfly valves: Set end stop CLOSED first.
●
Recommendation for ball valves: Set end stop OPEN first.
To check the valve shaft position, the pointer cover may be disassembled.
6.1.1.
Set end stop CLOSED (butterfly valves)
Figure 15: End stop
[1]
Screws
[2]
End stop
[3]
Housing
1.
Loosen the eight screws [1] at end stop [2], but do not remove. The end stop
must freely turn.
No overload protection at valve for unfastened end stop!
→
In motor operation: Stop travel before reaching the valve end position (consider
overrun).
→
The last part of the travel must be completed in manual operation mode.
2.
Turn valve via handwheel to position CLOSED. Check whether end stop [2]
rotates simultaneously.
21
GS 315 – GS 500
GZ 30.1 – GZ 40.1
Commissioning
