17
2.3. Mounting the flow meter
2.3.1. Mounting preparation
2.3.1.1. When mounting the flow meter on site, a free pipeline section should be
provided.
2.3.1.2. The flow meter
should be transported packed in the manufacturer’s box.
After the flow meter has been moved to the mounting location from
a cold environment into a warm one (with ambient temperature above
zero), it shall be left to stand in the manuf
acturer’s box for at least 3
hours to make sure that no condensation remains inside.
When unpacking the flow meter, check that the delivery package
contains all items specified in the Equipment Certificate.
2.3.2. Mounting requirements
2.3.2.1. The requirements for on-site mounting of the flow meter are specified in
section 2.1.2.
The CP can be mounted into the pipeline horizontally, vertically, or
obliquely (Fig.4). The CP should not be placed at the upper point of the
pipeline. The recommended location (if applicable) is at the lower or
uprising pipeline section.
Fig.4. Recommended locations of the CP
NOTE. In case of impossibility of installation of a flow meter in rec-
ommended places device installation in the top point of the pipeline is
allowed. Installation of the air valve in the point which is above is thus
necessary is more true points of flowing part of a flow meter, for exam-
ple in pipeline expansion.
ATTENTION! It is necessary to watch serviceability of the air
valve. Correct work of a flow meter is possible only in the absence
of air in the channel.
2.3.2.2. The difference in the internal diameters of the pipeline and measuring
Pipe Section (PS) of the CP at link up points should not exceed
0.05
·
DN.
2.3.2.3. When mounting the CP on the pipeline, it should be placed so that the
PEA longitudinal axis (the axis that runs through the PEA pair along the
pipeline axis) would make an angle with the vertical of
= 45
-90
(Fig.5).
