Samson 3214 - Page 33

EB 5868-1 EN 6-1
Start-up
6 Start-up
The work described in this section is to be
performed only by personnel appropriately
qualied to carry out such tasks.
Risk of burn injuries due to hot components
and pipeline.
Valve components and the pipeline may be-
come very hot. Risk of burn injuries.
Î Wear protective clothing and safety
gloves.
Crush hazard arising from actuator and
plug stem moving.
Î Do not insert hands or nger into the
yoke while the supply voltage is connect-
ed to the actuator.
Î Disconnect and lock the supply voltage
before performing any work on the
control valve.
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), re-
lease any stored energy in the actuator.
Risk of hearing loss or deafness due to loud
noise.
Noise emission (e.g. cavitation or ashing)
may occur during operation caused by the
process medium and the operating condi-
tions which can damage hearing.
Î Wear hearing protection when working
near the 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 the 'Installa-
tion' section > 'Testing the installed
valve').
− The prevailing conditions in the plant
section concerned meet the valve sizing
requirements (see information under 'In-
tended use' in the 'Safety instructions
and measures' section).
Start-up/putting the device back into oper-
ation
1. Allow the valve to warm up to reach am-
bient temperature before start-up when
the ambient temperature and process
medium temperature differ greatly or the
medium properties require such a mea-
sure.
2. Slowly open the shut-off valves in the
pipeline. Slowly opening these valves
prevents a sudden surge in pressure and
WARNING
!
WARNING
!
WARNING
!
WARNING
!