EB 8048 EN
33
Start-up
6 Start-up
The work described in this section is only to
be performed by personnel qualified for the
assignment accordingly.
Risk of burn injuries due to hot or cold com-
ponents 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 heat up.
Î
Wear protective clothing and safety
gloves.
Risk of personal injury due to pressurized
components and process medium escaping
under pressure.
Î
Do not loosen the screw of the test con-
nection while the valve is pressurized.
Risk of hearing loss or deafness due to loud
noise.
Noise emission (e.g. cavitation or flashing)
may occur during operation caused by the
process medium and the operating
conditions. Additionally, a brief loud noise
may occur through the sudden venting of the
pneumatic actuator (see 'Fail-safe position')
or pneumatic valve accessories not fitted with
noise-reducing fittings. Both can damage
hearing.
Î
Wear hearing protection when working
near the valve.
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,
disconnect and lock the pneumatic air
supply as well as the control signal.
Î
Do not impede the movement of the
actuator 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),
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, the actuator or
valve accessories may vent during closed-
loop control or when the valve opens or
closes.
Î
Wear eye protection when working in
close proximity to the control valve.
WARNING
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WARNING
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WARNING
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WARNING
!
WARNING
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WARNING
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WARNING
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