Samson 3349, Mounting And Operating Instructions

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EB 8048-2 EN 7-1
Operation
7 Operation
Immediately after completing start-up or put-
ting the valve back into operation, the valve
is ready for use.
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 warm up to the ambient tem-
perature.
Î
Wear protective clothing and safety
gloves.
Risk of personal injury due to pressurized
components and process medium being
discharged.
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 condi-
tions. Additionally, a loud noise may briefly
occur through the sudden venting of the
pneumatic actuator or pneumatic valve ac-
cessories not fitted with noise-reducing fit -
tings. Both can damage hearing.
Î
Wear hearing protection when working
near the valve.
Crush hazard arising from actuator and
plug stem moving in pneumatic control
valves with Type 3271 or Type 3277
Actuator.
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 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), re
-
lease any stored energy in the actuator
(e.g. spring compression). See associat -
ed 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.
WARNING !
WARNING !
WARNING !
WARNING ! WARNING !
WARNING ! WARNING !