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Servicing
WARNING
WARNING
!
!
Risk of personal injury due to residual pro-
cess medium in the valve.
While working on the valve, residual me-
dium can flow out of the valve and, depend-
ing on its properties, cause personal injury,
e.g. (chemical) burns.
Î Wear protective clothing, safety gloves,
respiratory protection and eye protec-
tion.
NOTICE
!
Risk of valve damage due to excessively
high or low tightening torques.
Observe the specified torques when tighten-
ing control valve components. Excessive
tightening torques lead to parts wearing out
more quickly. Parts that are too loose may
cause leakage.
Î Observe the specified tightening torques
(see 'Tightening torques' in Annex).
NOTICE
!
Risk of valve damage due to the use of
unsuitable tools.
Î Only use tools approved by SAMSON.
NOTICE
!
Risk of valve damage due to the use of
unsuitable lubricants.
Î Only use lubricants approved by
SAMSON.
9-2
Note
The control valve was checked by SAMSON
before delivery.
− Certain test results certified by SAMSON
lose their validity when the valve is
opened. Such testing includes seat leakage
and leak tests.
− The product warranty becomes void if
service or repair work not described in
these instructions is performed without
prior agreement by SAMSON's After-sales
Service.
− Only use original spare parts by
SAMSON, which comply with the original
specifications.
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.
Tip
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
EB 8140 EN
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