Elgas EQZ, Installation And Operating Instructions Manual

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1 Field of application
Type TRZ /EQZ /EQZK
Size
G/Q 16 - G/Q 400
Nominal diameter DN 40 - DN 100
Maximum pressure (Design):
Flange
Screwed
6 bar
4 bar
Maximum operating pressure
4 bar
Temperature range - gas -10 °C ... +55 °C /+60 °C/+60 °C
Temperature range - ambient -10 °C ... +55 °C /+60 °C/+60 °C
Turbine flow meters are suitable for custody transfer and Quantometers for internal
and industrial measurements of clean and dry natural gas, town (city) gas, propane,
butane, nitrogen (gas), air and inert gases.
Installation, connection, commissioning and maintenance must only be carried out by
expert technicians who, first of all, have read and understood the operating
instructions. These operating instructions include all important information required
for the installation and operation of Radial-blade turbine gas meters type TRZ and
Quantometer type EQZ/EQZK. They supplement the relevant national regulations
with respect to the manufacturing and equipment of measuring systems as well as
with respect to maintenance activities. For the installation in explosion sensitive areas
please refer to section 5 in this manual.
2 Installation conditions

If possible, the TRZ/EQZ should be installed in a closed area.

When installing a meter outdoors, it should be protected from the direct effects of
the weather. The meter has a protection rating of IP65 and is UV-resistant.

Valves installed in front or after the gas meter should be opened slowly.

Regulators, valves and armatures should be installed with a minimum distance of 2 x
DN up-stream of the meter. (EN12261)

The gas flow should be free of pulsations and vary only in a modulating way.

Strong external vibrations (e.g. feed pumps) on the meter can damage it.