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Mounting and start-up
Pressure gauges
Install a pressure gauge both upstream and
downstream of the regulator to monitor the
pressures prevailing in the plant (see Fig. 5).
5.3 Preparation for installation
Before mounting, make sure the following
conditions are met:
− The regulator is clean.
− The regulator is not damaged.
− Install a strainer upstream of the regula-
tor.
− The regulator data on the nameplate
(type designation, nominal size,
material, pressure rating and
temperature range) match the plant
conditions (nominal size and pressure
rating of the pipeline, medium
temperature etc.). See the 'Markings on
the device' chapter for nameplate details.
− The requested or required additional fit-
tings (see the 'Design and principle of
operation' chapter) have been installed
or prepared as necessary before install-
ing the valve.
Proceed as follows:
Î Lay out the necessary material and tools
to have them ready during installation
work.
Î Flush the pipeline before installing the
regulator (see Chapter 5.3.1).
The plant operator is responsible for
cleaning the pipelines in the plant.
Î Check any mounted pressure gauges to
make sure they function properly.
22
5.3.1
Cleaning the pipeline
We recommend additionally flushing the
pipeline without an installed regulator over a
time period of several minutes before start-
up. In this case, install a suitable length of
pipe into the pipeline in place of the regula-
tor.
Î Before flushing the plant with the process
medium, read the information under
'Starting up the plant' in Chapter 6.
Î Observe the mesh size of the upstream
strainer for the maximum particle size.
Use strainers to suit the process medium.
Î Check the strainer for dirt each time the
pipeline is flushed and clean it, if neces-
sary.
EB 2623-1 EN
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