Samson 3256, Монтаж и эксплуатация, Страница: 50 / 84

8-2 EB 8065 EN
Malfunctions
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.
Malfunction Possible reasons Recommended action
The valve leaks to the
atmosphere (fugitive
emissions).
Defective packing Replace packing (see the 'Servicing' section) or
contact our after-sales service.
Version with adjustable
packing 1) : packing not
tightened correctly
Adjust the packing (see information under
'Adjusting the packing' in the 'Testing the
installed valve' section). Contact our after-sales
service when it continues to leak.
Version with bellows seal:
the bellows seal is defec-
tive.
Contact our after-sales service.
Flange joint loose or gasket
worn out
Check the flange joint.
Replace gasket at the flanged joint (see the
'Servicing' section) or contact our after-sales
service.
1)
See the 'Markings on the device' section.
Contact our after-sales service for malfunctions not listed in the table.
Note