Start-Up; Start-Up/Putting The Valve Back Into Operation - Samson 3351 Mounting And Operating Instructions

6 Start-up

The work described in this section is to be
performed only by personnel appropriately
qualified to carry out such tasks.
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 warm up to the ambient tem-
perature.
Î Wear protective clothing and safety
gloves.
WARNING
!
Risk of personal injury due to pressurized
components and process medium being dis-
charged.
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 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.
EB 8039 EN
Î Wear hearing protection when working
near the valve.
WARNING WARNING
! !
Risk of personal injury due to exhaust air
being vented.
While the valve is operating, air is vented
from the actuator, e.g. 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 'In-
tended use' in the 'Safety instructions
and measures' section).
6.1 Start-up/putting the valve
back into operation
1. Allow the valve to cool down or warm up
to reach ambient temperature before
start-up when the ambient temperature
and process medium temperature differ
greatly or the medium properties require
such a measure.
Start-up
6-1