Malfunctions; Emergency Action; Decommissioning And Disassembly; Decommissioning - Samson TROVIS 5724-3 Mounting And Operating Instructions

Malfunctions

8 Malfunctions
Troubleshooting (see Table 1).
Note
Contact SAMSON's After-sales Service de-
partment for malfunctions not listed in the ta-
ble.

8.1 Emergency action

The valve, on which the electric actuator with
fail-safe action is mounted, is moved to its
fail-safe position upon power supply failure
(see section 3.1).
The plant operator is responsible for emer-
gency action to be taken in the plant.
Tip
Emergency action in the event of valve
failure is described in the associated valve
documentation.
9 Decommissioning and disas-
sembly
DANGER DANGER
! !
Risk of electric shock.
− Before performing any work on the device
and before opening the device, disconnect
the power supply and protect it against un-
intentional reconnection.
− Only use power interruption devices that
are protected against unintentional recon-
nection of the power supply.
30
DANGER DANGER
! !
Risk of bursting in control valve components
due to incorrect opening.
− Before starting any work on the control
valve, depressurize all plant sections con-
cerned and the valve.
− Drain the process medium from all the
plant sections concerned and from the
valve.
− Wear recommended personal protective
equipment. See associated valve documen-
tation.

9.1 Decommissioning

To decommission the electric actuator for
maintenance work or disassembly, proceed
as follows:
1. Close the shut-off valves upstream and
downstream of the control valve to stop
the process medium from flowing through
the valve.
2. Completely drain the pipelines and
valve.
3. Disconnect and lock the power supply.
4. If necessary, allow the pipeline and valve
components to cool down.
5. Remove the valve from the pipeline. See
associated valve documentation.
EB 5724 EN