Start-Up - Samson 3241-1-Gas Mounting And Operating Instructions

6 Start-up

The work described in this section is only to
be performed by personnel qualified for the
assignment accordingly.
WARNING
!
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.
WARNING
!
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.
WARNING
!
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 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.
EB 8020 EN
Î Wear hearing protection when working
near the valve.
WARNING WARNING
! !
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.
WARNING WARNING
! !
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.
Start-up
6-1