Samson 42-20, Mounting And Operating Instructions

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EB 3007 EN 8-3
Malfunctions
The malfunctions listed in section 8.1 are
caused by mechanical faults and incorrect
regulator sizing. In the simplest case, the
functioning can be restored following the
recommended action. Special tools may be
required to rectify the fault.
Exceptional operating and installation condi-
tions may lead to changed situations that
may affect the control response and lead to
malfunctions. For troubleshooting, the condi-
tions, such as installation, process medium,
temperature and pressure conditions, must
be taken into account.
SAMSON's After-sales Service can support
you in drawing up an inspection and test
plan for your plant.
Tip
8.2 Emergency action
Plant operators are responsible for emergen-
cy action to be taken in the plant.
We recommend removing the regulator from
the pipeline before repairing it.
In the event of a regulator malfunction:
1. Close the shut-off valves upstream and
downstream of the regulator to stop the
process medium from flowing through
the regulator.
2. Perform troubleshooting (see sec-
tion 8.1).
3. Rectify those malfunctions that can be
remedied based on the instructions
provided here. Contact SAMSON's
After-sales Service in all other cases.
Putting the regulator back into operation
after a malfunction
See the 'Start-up' section.