Start-Up And Putting The Device Back Into Operation; Starting Up The Plant - Samson 42-36 E Mounting And Operating Instructions

Start-up
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.
Î Wear hearing protection when working
near the valve.
Before start-up or putting the device back in-
to service, make sure the following condi-
tions are met:
− The regulator is properly installed into
the pipeline (see the 'Installation' sec-
tion).
− The leak and function tests have been
completed successfully (see the 'Testing
the regulator' section).
− The prevailing conditions in the plant
section concerned meet the regulator siz-
ing requirements (see information under
'Intended use' in the 'Safety instructions
and measures' section).
6.1 Start-up and putting the
device back into operation
1. Depending on the field of application,
allow the regulator to cool down or
warm up to reach ambient temperature
before start up.
2. Slowly open the shut-off valves in the
pipeline. Slowly opening these valves
prevents a sudden surge in pressure and
6-2
high flow velocities which can damage
the valve.
3. Check the regulator to ensure it functions
properly.
Before starting up the plant, make sure the
following conditions are met:
− The control line is open (needle valve)
and correctly connected.

6.2 Starting up the plant

1. Open the shut-off valves slowly prefera-
bly starting from the upstream pressure
side. Afterwards, open all the valves on
the consumer side (downstream of the
regulator).
2. Fill the plant slowly with the process me-
dium. Avoid pressure surges.
3. Make sure that the pressure rises simulta-
neously upstream and downstream of the
regulator to avoid damaging the balanc-
ing bellows.
Note
The restriction (2.7) must be open while fill-
ing the plant.
Î Put the flow regulator into operation by
slowly opening the shut-off valves prefer-
ably starting from the return flow pipe.
Î Vent the bellows housing of valves bal-
anced by a bellows (DN 125 and larger)
at the stopper (8) located at the side.
EB 3018 EN