Samson 3251-E, Mounting And Operating Instructions

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8-2 EB 8052-E EN
Malfunctions
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 flowing
through the valve.
2. Perform troubleshooting (see sec-
tion 8.1).
3. Rectify those malfunctions that can be
remedied based on the instructions pro -
vided here. Contact our after-sales ser-
vice 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 'Installation'
section > 'Testing the installed valve'). Contact
our after-sales service when it continues to leak.
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