Periodic Testing - Samson EB 8015 EN Mounting And Operating Instructions

Servicing

9.1 Periodic testing

Depending on the operating conditions,
check the valve at certain intervals to prevent
possible failure before it can occur. Plant op-
erators are responsible for drawing up an
inspection and test plan.
SAMSON recommends the following inspections and tests:
Inspection and testing
Check the markings, labels and
nameplates on the valve for their
readability and completeness.
Check the valve for external damage
that could impair the proper functioning
of the control valve or even its safe
operation.
Check the valve accessories to ensure
they are mounted properly.
Seat leakage (see Fig. 9-1)
1)
(without testing to check that the
leakage class requirements are met)
External leakage (fugitive emissions)
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.
9-4
Tip
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
Recommended action to be taken in the event of a
negative result
Immediately renew damaged, missing or incorrect
nameplates or labels.
Clean any inscriptions that are covered with dirt and are
illegible.
Repair any damage immediately. If necessary, put the
control valve out of operation (see the 'Decommissioning'
chapter).
Tighten the connections of the valve accessories.
Shut off the section of the pipeline and flush the valve to
remove any dirt and/or deposited foreign particles between
the seat and plug.
: Check flanged joints (tightening torques).
1)
Replace the gaskets at the flanged joints. For this purpose,
put the control valve out of operation (see the
'Decommissioning' chapter).
Version with adjustable packing
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).
: adjust the packing (see
2)
EB 8015 EN