EB 8340 EN 11-1
Decommissioning
11 Decommissioning
The work described in this section is only to
be performed by personnel appropriately
qualiedtocarryoutsuchtasks.
Risk of fatal injury due to electric shock.
Î Before disconnecting live wires, switch
off the supply voltage at the actuator and
protect it against unintentional reconnec-
tion.
Risk of personal injury due to residual
process medium in the valve.
While working on the valve, residual me-
dium can ow out of the valve and, depend-
ing on its properties, cause personal injury,
e.g. (chemical) burns.
Î Wear protective clothing, safety gloves
and eye protection.
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.
To decommission the electrohydraulic actua-
tor for repair work or disassembly, proceed
as follows:
Î Put the control valve out of operation (see
associated valve documentation).
Î Retract actuator stem.
Î Disconnect the supply voltage and pro-
tect it against unintentional reconnection.
Î Make sure that a signal from the control-
ler cannot act upon the actuator.
For versions with "actuator stem extends"
fail-safe action, the supply voltage must re-
main connected to prevent the actuator stem
extending by itself.
DANGER
!
WARNING
!
WARNING
!
Note
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