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10-2
EB 8075 EN
Decommissioning
Î
Before unblocking the actuator and
piston stem after they have become
blocked (e.g. due to seizing up after
remaining in the same position for a
long time), release any stored energy in
the actuator (e.g. spring compression).
See associated actuator documentation.
Risk of personal injury due to exhaust air
being vented.
While the valve is operating, air is vented
from, for example, the actuator during
closed-loop operation or when the valve
opens or closes.
Î
Wear eye protection when working in
close proximity to the control valve.
Risk of personal injury due to residual
process medium in the valve.
While working on the valve, residual me-
dium can flow out of the valve and, depend-
ing on its properties, cause personal injury,
e.g. (chemical) burns.
Î
Wear protective clothing, safety gloves,
respiratory protection and eye protec-
tion.
To decommission the control valve for service
work or to remove it from the pipeline, pro-
ceed 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 pneumatic air
supply to depressurize the actuator.
4. Release any stored energy.
5. If necessary, allow the pipeline and valve
components to cool down or warm up to
the ambient temperature.
WARNING
!
WARNING
!
WARNING
!
WARNING
!
Summary of Contents for EB 8075 EN
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