Samson 3246, Mounting And Operating Instructions

Page: 58 / 96

8-2 EB 8046 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 con-
tact our after-sales service.
Flange joint loose or
gasket worn out
Check the flange joint.
Replace gasket at the flanged joint (see the 'Servic-
ing' section) or contact our after-sales service.
Icing up of the insulat-
ing section and/or
packing chamber.
Circulation inhibitor
defective.
Replace circulation inhibitor (see the 'Servicing' sec-
tion) or contact our after-sales service.
Contact our after-sales service for malfunctions not listed in the table.
Note