Samson 3251 - Emergency Action Procedures

8-2 EB 8052 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 owing
through the valve.
2. Perform troubleshooting (see Chap-
ter8.1).
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.
Malfunction Possible reasons Recommended action
The valve leaks to the
atmosphere (fugitive
emissions).
Defective packing Replace packing
1)
(see the 'Servicing' chapter) or
contact our after-sales service.
Version with adjustable
packing
2)
: packing not
tightened correctly
Adjust the packing (see section 'Adjusting the
packing' in the 'Installation' chapter> 'Testing the
installed valve'). Contact our after-sales service
when it continues to leak.
Version with bellows seal:
the bellows seal is
defective.
Contact our after-sales service.
Flanged joint loose or body
gaskets worn out
Check the anged joint.
Replace gaskets at the anged joint (see the
'Servicing' chapter) or contact our after-sales
service.
1)
Only replace the packing in versions without bellows seal
2)
See the 'Markings on the device' chapter.
Contact our after-sales service for malfunctions not listed in the table.
Note