Quick Installation Manual (EN)
Rotary Gas Meter
RRM G010/G016/G025/G040/G65
DN050 Class 150 FF
PRECAUTIONS:
medium:
Natural gas (CH4) - gas family: Group 1
operating conditions:
p = 0 - 20 barg / t = -25 - 70 °C
mechanical class:
M2
- electromagnetic class:
E1
Meter can be installed in open air.
Avoid direct sunshine on the meter.
IP-classification of index: IP67
Never use the meter as a spool piece during welding.
The meter must be depressurised before filling or adding oil.
Before removing the meter, the oil should be drained.
The meter should be transported and stored with the rotor axis horizontal.
Use only devices with electrical characteristics as recommended (see connection diagram)
The maximum tightening torque on the Pressure and Temperature tapping connections is:
18 Nm
To tighten the swivel nuts; use 2 wrenches to avoid
over tighten
and damage the meter body.
Avoid mechanical shock during handling and transportation of the meter.
Avoid strong magnet fields close to the meter (particular the index), since they can affect the metrological
performance and/or interrupt the pulse generators.
Seal all plugs and sight glasses to overcome fraud and/or theft of gas.
INSTALLATION INSTRUCTIONS:
1
Check the meter for damage due to transportation and handling. Insure the impellers turn freely and no objects
or contaminations are in the measuring chamber.
2
The piping on the inlet side of the meter must be clean (free of dirt, welding beads and pipe scale). It is recommended to
install a 100 micron filter upstream of the meter. For new installations it is recommended to install a mesh wire screen (250 micron)
for the first weeks of operation.
3
Connect the meter inlet to the gas supply side of the line, insuring the gas flow will be in the same direction as the arrow on
the meter body type plate. For P and T positions see figures below. The pressure reference connection (Pm) is always located
on the
INLET
of the meter.
Left to Right
Right to Left
Top to Bottom
Pressure tapping
High frequency pulser
Temperature tapping
Lubrication Point
4
Install the meter without piping strain to prevent a binding of the impellers.
Level the meter to within 5mm/m side-to-side and front-to-back.
