8-2 EB 8097 EN
Malfunctions
Malfunction Possible reasons Recommended action
The valve leaks to the
atmosphere (fugitive
emissions).
Seals defective Replace sealing parts (see the 'Servicing' chapter).
Connections loosened Check connections.
Contact our after-sales service for malfunc-
tions not listed in the table.
8.2 Emergency action
Plant operators are responsible for emergen-
cy 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 owing
through the valve.
2. Perform troubleshooting (see Chap-
ter8.1).
3. Rectify those malfunctions that can be
remedied following the information given
in this document. Contact our after-sales
service in all other cases.
Putting the device back into operation after
a malfunction
See the 'Start-up' chapter.
Note
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