Samson 3251-E, Монтаж и эксплуатация

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EB 8052-E EN 5-15
Installation
5.4 Testing the installed valve
Risk of bursting due to incorrect opening of
pressurized equipment or components.
Valves and pipelines are pressure equipment
that may burst when handled incorrectly.
Flying projectile fragments or the release of
process medium under pressure can cause
serious injury or even death.
Before working on the control valve:
Î
Depressurize all plant sections affected
and the valve (including the actuator).
Release any stored energy.
Î
Drain the process medium from all the
plant sections concerned as well as the
valve.
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 loud noise may
briefly occur through the sudden venting of
the pneumatic actuator 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 moving parts
(actuator and plug or piston stem).
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, dis-
connect and lock the pneumatic air sup-
ply as well as the control signal.
Î
Do not impede the movement of the actu-
ator and plug or piston stem by inserting
objects into the yoke.
Î
Before unblocking the actuator and plug
or piston stem after they have become
blocked (e.g. due to seizing up after re-
maining 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 the actuator, for example, during
closed-loop operation or when the valve
opens or closes.
Î
Wear eye protection when working in
close proximity to the control valve.
DANGER !
WARNING !
WARNING ! WARNING !
WARNING ! WARNING !