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FC01- Ex | Flow Meter
EX ATMOSPHERE
Definitions and mounting instructions
2.6.1.2.2 Gases
If gases are to be monitored, the mounting attitude of the monitoring head is unimportant in either
vertical or horizontal pipelines. There should be a distance of at least 20 pipe diameters before the
monitoring head, and 5 pipe diameters after the monitoring head before or after bends and changes
in pipe diameter, to avoid any effects of turbulence (fig. 3).
2.6.1.2.3 Depth of threading
The two sensors should be screwed into the pipeline far enough to ensure that the sensors are positioned fully in the flow stream. However, care should also be taken that the sensor is not screwed in
too far, thus causing an undue restriction in the pipe bore. It is therefore recommended to connect
a union of suitable length to the pipe.
If installed in fittings or T pieces with appropriate internal thread the max. length of the connection
piece must be adjusted to the inner pipe wall.
Caution!
The sensors must be positioned fully in the flow stream.
Observe installation position, direction and required insertion depth.
Ex monitoring heads must be screwed in at least 7 threads.
2.6.1.2.4 Sealing
Use suitable thread sealing, e.g. hemp, teflon band, sealing glue:
- with fitting to DIN 3852, form A (with O-ring)
→ length 36 mm
- with fitting to DIN 3852, form B (with sealing face) → length 27.5 mm
Please pressurize the pipe system and check with regard to leakages.
ca. 1-2 m m
spanner flats parallel to
flow dir ection
S
fig. 4
15