Samson 3595, Mounting And Operating Instructions

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EB 8079 EN 9-3
Servicing
Risk of valve damage due to the use of un-
suitable lubricants.
Î
Only use lubricants approved by
SAMSON (see the 'Tightening torques,
lubricants and tools' section in the an
-
nex).
The control valve was checked by SAMSON
before it left the factory.
− 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 ser -
vice or repair work not described in these
instructions is performed without prior
agreement by SAMSON's after-sales ser
-
vice.
− 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
a possible failure before it can occur. Opera-
tors are responsible for drawing up an in-
spection and test plan.
Our after-sales service can support you in
drawing up an inspection and test plan for
your plant.
9.2 Preparing the valve for
service work
The valve can remain installed in the pipeline
and does not need to be removed to perform
the service work.
1. Lay out the necessary material and tools
to have them ready for the service 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 actuator connection assem-
bly from the plug stem.
5. Undo the body nuts on the valve bonnet
gradually in a crisscross pattern.
6. Lift the valve bonnet together with the
plug stem and plug upwards off the valve
body, while holding the plug stem in
place to prevent it from slipping out and
damaging the plug stem and plug.
7. Take the cage (two-pieced, if applicable)
and seat ring out of the valve body.
The following service work can be per-
formed after preparation is completed:
− Replacing the gaskets (see section 9.4.1)
− Replacing the packing (see section 9.4.2)
− Replacing the bellows seal (see sec-
tion 9.4.3)
− Lapping the seat and plug (see sec-
tion 9.4.4)
NOTICE !
Note
Tip
Tip