19
3. INSTALLATION OF THE FLOW METER
3.1. Transportation
The flow meter must be transported to the installation site in its orig-
inal packaging.
After transportation to the place of installation at a negative temper-
ature and introduction into the room with a positive temperature, the flow
meter should be kept in the package at least 3 hours to avoid moisture
condensation.
When unpacking the flow meter, check its completeness in accord-
ance with the passport for this device.
3.2. Installation requirements for the flow meter
3.2.1. To install the device on the site it is necessary to have a free section in
the pipeline for installation of the flow meter.
The following conditions must be met at the CP installation site:
- Liquid pressure and pipeline operation modes exclude gas formation
and/or accumulation of gas (air)
- The internal volume of the CP must be filled with liquid during operation;
- there are no or minimum pulsations and swirls of liquid.
CP may be installed in horizontal, vertical or inclined piping (Fig.4).
The CP (PEA) must not be located at the highest point of the pipe section.
The most suitable place for installation, if any, is the upstream or down-
stream section of the pipeline.
Fig.4. Recommended installation locations for the CP of flow meter
NOTE. If it is not possible to install the flow meter in the recom-
mended places, it is possible to install the device at the top of the pipeline.
It is necessary to install an air valve (air vent) at a point above the upper
point of the flow meter, for example, in the expansion of the pipeline.
WARNING:
Ensure that the air valve is in good working order. Cor-
rect operation of the flow meter is possible only when there is no air in
the duct.
3.2.2. The difference between the inner diameters of the pipeline and the CP
pipeline section at the jointing points must not exceed 0.05
·
DN.
3.2.3. When installing the CP on a pipeline, it is recommended that the longitu-
dinal plane of PEA (the plane passing through a pair of PEA along the
