EB 8222-1 EN 9-3
Service and conversion work
The control valve was checked by SAMSON
before it left the factory.
− Certain test results certied 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
specications.
9.1 Periodic testing
Depending on the operating conditions,
check the valve at certain intervals to prevent
a possible failure before it can occur. Plant
operators are responsible for drawing up an
inspection and test plan.
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
9.2 Preparation for servicing
or conversion work
1. Lay out the necessary material and tools
to have them ready for the intended
work.
2. Put the control valve out of operation (see
the 'Decommissioning' section).
3. Remove the actuator from the valve. See
associated actuator documentation.
4. Remove the valve from the pipeline be-
fore performing any service work (see
the 'Removal' section).
The following service work can be per-
formed after preparation is completed:
− Replace the packing (see section9.5.1)
− Replace the seat ring (see section9.5.2)
9.3 Mounting the actuator on
the valve after servicing or
conversion work
1. Mount actuator. See associated actuator
documentation and in the 'Installation'
section.
2. Adjust lower or upper signal bench
range. See associated actuator docu-
mentation.
3. If the valve has been removed, re-install
the valve into the pipeline (see the 'As-
sembly and installation' section).
4. Put the control valve back into operation
(see the 'Start-up' section). Observe the
requirements and conditions for start-up
or putting the valve back into operation.
Note
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