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8.2 Emergency action
The plant operator is responsible for emer-
gency action to be taken in the plant.
In the event of a valve malfunction:
1. Close the shut-off valves upstream and
downstream of the control valve to stop
the process medium from flowing
through the valve.
2. Perform troubleshooting (see sec-
tion 8.1).
3. Rectify those malfunctions that can be
remedied based on the instructions
provided here. Contact our after-sales
service in all other cases.
Putting the valve back into operation after
a malfunction
See the 'Start-up' section.
EB 8075 EN
Malfunctions
8-3
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