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VI. INSTALLATION AND OPERATION
Before installing the gas meter ensure that it is suitable for the system's operational
parameters. In particular, the following type plate information should be taken
into consideration:
Acceptable gas meter gauge pressure [MPa), labelled p
max
,
Maximum actual flow [m
3
/h], labelled Q
max
,
Acceptable working position as indicated on the type plate:
- H horizontal (standard version),
- VD vertical; downward vertical flow (option – by request),
- VU vertical; upward vertical flow (option – by request),
Maximum load of the gas meter may be exceeded
by not more than 25% for not longer than 30 minutes.
CGT-02 gas meters can be used both indoors in stabilized temperature conditions
and outdoors (open locations). In the latter case, it is recommended that the gas meter
is shielded from direct exposure to atmospheric factors (metal containers, casings, roofs,
shields etc.)
The gas meter must be installed between sections of pipework of appropriate nominal
diameter, with axial alignment of the gas meter relative to the pipes according to gas industry
regulations. The static load of the system of pipes should not exceed values given
in the EN 12261:2002 standard. Table 6 lists the maximum torsion and bending moment
values. Gas meters with weights of more than 50 kg should rest on supports
so that their weight don’t deliver additional stress onto the pipework. Gas meters should not
be installed at the lowest points of the system lines, as condensate and impurities may
accumulate in such areas.
Dimensions listed in Tables 3a and 3b and illustrated in Figure 18 may be helpful when
designing the location for the installation of the gas meter.
Fig. 18. Basic dimensions of CGT-02 turbine gas meters
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