Start-Up - Samson 3246 Mounting And Operating Instructions

6 Start-up

The work described in this section is only to
be performed by personnel appropriately
qualified to carry out such tasks.
WARNING
!
Risk of burn injuries due to cold compo-
nents and pipelines.
Depending on the process medium, valve
components and pipelines may get extremely
cold and cause cryogenic burns.
Î Wear protective clothing and safety
gloves.
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
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.
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.
EB 8046 EN
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 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),
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, 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.
Before start-up or putting the valve back into
service, make sure the following conditions
are met:
− The valve is properly installed into the
pipeline (see the 'Installation' section).
− The leak and function tests have been
completed successfully (see 'Testing the
installed valve' in the 'Installation' sec-
tion).
− The prevailing conditions in the plant
section concerned meet the valve sizing
requirements (see information under
Start-up
6-1