Samson 3254, Mounting And Operating Instructions

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EB 8060 EN 11-1
Removal
11 Removal
The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
Risk of burn injuries due to hot or cold
components and pipeline.
Valve components and the pipeline may be-
come very hot or cold. Risk of burn injuries.
Î
Allow components and pipelines to cool
down or warm up to the ambient tem-
perature.
Î
Wear protective clothing and safety
gloves.
Crush hazard arising from actuator and
plug stem moving.
Î
Do not insert hands or finger into the
yoke while the air supply is connected to
the actuator.
Î
Before working on the control valve, dis-
connect and lock the pneumatic air sup-
ply as well as the control signal.
Î
Do not impede the movement of the actu-
ator and plug stem by inserting objects
into the yoke.
Î
Before unblocking the actuator and plug
stem after they have become blocked
(e.g. due to seizing up after remaining in
the same position for a long time), re-
lease any stored energy in the actuator
(e.g. spring compression). See associat-
ed actuator documentation.
Risk of personal injury due to residual
process medium in the valve.
While working on the valve, residual
medium can flow out of the valve and,
depending on its properties, cause personal
injury, e.g. (chemical) burns.
Î
Wear protective clothing, safety gloves,
respiratory protection and eye protec-
tion.
Risk of personal injury due to preloaded
springs.
Actuators with preloaded springs are under
tension. They can be identified by the long
bolts protruding from the bottom of the actu-
ator.
Î
Before starting any work on the actuator,
relieve the compression from the pre -
loaded springs.
Risk of personal injury due to incorrect
removal of the anti-rotation fixture under
tension.
Once the actuator has been mounted on the
valve and the assembly is ready for use, the
clamps (301) of the anti-rotation fixture on
the plug stem are under tension.
Î
Follow the instructions in this document
during mounting or removal.
Î
Do not loosen the screws (303) of the an-
ti-rotation fixture while the force generat-
ed by the supply air and/or the actuator
WARNING !
WARNING ! WARNING !
WARNING ! WARNING !
WARNING !
WARNING !