DRESSER FLUXI 2000/TZ Mode D'emploi page 5

Keep this manual easily accessible for all users.
Please respect all national rules for installation, operati-
on and service of gas meters.
1 Characteristics
Fluxi 2000/TZ meters are designed to measure gases of
the 1st, 2nd and 3rd gas families as specified in EN437 as
well as various filtered, and non-corrosive gases.
Turbines gas meters are flow meters. The flow of gas
turns a turbine wheel and the rotating speed of the tur-
bine is proportional to the linear speed of the gas. The
movement is mechanically transmitted to the totaliser
through the magnetic coupling. Detailed characteristics
are given in Annex 5.
2 Reception of the Fluxi 2000/TZ
2.1 Packing
The meter, depending on the size is delivered in an in-
dividual carton or on a wood pallet. The packaging con-
tains the plugs for the installed transmitters and the lu-
bricant when an oil pump is installed.
2.2 Storage
If the meter is not going to be used immediately, it
should be stored under cover in a clean, dry environ-
ment. The caps fitted at the inlet and the outlet pipe
must stay in place until installation. Storing temperature:
-40°C to +70°C.
2.3 Handling
Meters should be handled with care. They must be lifted
only with belts around the main body or in the eyelets.
3 Installation
3.1 General recommendations: See Annex 1 and
the PED information in Annex 7.
• The standard model of Fluxi 2000/TZ is designed for
use with clean and non-aggressive gases. For use with
aggressive gases please contact Dresser Actaris Gas
for special versions.
• (1) Before installation, check visually that the meter has
not been damaged during transport.
• (2) Do NOT weld pipework with a meter installed.
• (3) The meter should be installed without stress in the
pipework. The flanges must be correctly lined up. The
tightening torque of the bolts must not exceed:
M16 M20 M24
120 200 300
Nm Nm Nm
M27 M30 M33 ≥ M36
400 550 700 1200
Nm Nm Nm Nm
• Please tighten bolts in opposite pairs. Flange gaskets
of adequate quality must be used.
• (4) To ensure accuracy, the meter has to be installed
with an inlet straight pipe of 2 DN minimum, no
downstream restriction. See details in Annex 2.
• (5) If the meter is equipped with an oil pump, turn oil
tank according to the installation position.
• (6) Transmitters connection: Gas Meters are often in-
stalled in areas where there is a risk that Gas will be
present. Therefore, electrical connections to meters
need to be made with consideration of the use of Ex
marked equipment or otherwise approved circuits.
For plug assignment and pulse values refer to the
main nameplate.
• (7) Dirt particles may damage the turbine wheel there-
fore the use of starting sieve and filter are recommen-
ded.
• (8) Pressure pulses must be avoided during starting
and operating to preserve the turbine wheel. To pre-
vent damage during starting, increase the pressure
slowly at less than 0,3 bar per second.
3.2 Recommended installation
Turbine meters are flow meters therefore their metrolo-
gy can be affected by disturbances existing in the flow
of gas.
The Fluxi 2000/TZ has been designed to have a low
sensitivity to flow disturbance. It can be installed with
a minimal straight upstream pipe length. No minimal
straight pipe is requested for the downstream pipe. See
all details in Annex 2.
An even better accuracy can be achieved by respecting
the following rules:
• Use preferably elbows pieces with large radius (≥5 DN)
to be installed at the inlet of the meter.
• For diameter variations, use preferably concentric con-
vergent and divergent pieces; sudden changes must
be avoided.
• Obstacles such as thermowells must not protrude in
the pipe within 2 DN upstream of the meter. Gaskets
should be correctly centered between the flanges and
not protrude into the pipe.
• The built-in thermowells can be installed or removed
without requiring a calibration of the meter.
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