9-4 EB 8052 EN
Servicing
SAMSON recommends the following inspections and tests:
Inspection and testing Recommended action to be taken in the event of a negative
result
Check the markings, labels and
nameplates on the valve for their
readability and completeness.
Immediately renew damaged, missing or incorrect nameplates
or labels.
Clean any inscriptions that are covered with dirt and are
illegible.
Check the valve for external damage
that could impair the proper
functioning of the control valve or even
its safe operation.
Repair any damage immediately. If necessary, put the control
valve out of operation (see the 'Decommissioning' chapter).
Check the valve accessories to ensure
they are mounted properly.
Tighten the connections of the valve accessories.
Seat leakage
1)
(see Fig.9-1)
(without testing to check that the
leakage class requirements are met)
Shut off the section of the pipeline and ush the valve to
remove any dirt and/or deposited foreign particles between
the seat and plug.
External leakage (fugitive emissions)
1)
:
Inspect the control valve at the possible
points of leakage to ensure there is no
leakage (see Fig.9-1).
Versions with bellows seal:
WARNING! Risk of personal injury
due to pressurized components and as
a result of process medium being
discharged.
Do not loosen the screw of the test
connection while the valve is
pressurized.
Check anged joints (tightening torques).
Replace the gaskets at the anged joints. For this purpose, put
the control valve out of operation (see the 'Decommissioning'
chapter).
Version with adjustable packing
2)
: adjust the packing (see
section 'Adjusting the packing' in the 'Installation' chapter >
'Testing the installed valve') or replace the packing. To replace
the packing, put the control valve out of operation (see the
'Decommissioning' chapter).
If the bellows seal is defective, put the control valve out of
operation (see the 'Decommissioning' chapter). To repair the
bellows seal, contact our after-sales service (see the 'Repairs'
chapter).
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