Yokogawa digitalYEWFLO (DY) - Manual (Page 14)

<3. INSTALLATION>
3-4
IM 01F06A00-01EN
Table 3.1 (c) Straight pipe length and recommendations (3)
Description Figure
Heat-Insulation:
When an integral-type fl owmeter or a remote type detector is
installed and the pipe carrying higt-temperature fl uids is heat-
insulated, do not wrap adiabatic materials around the installation
the bracket (DY015 to DY100) or the nozzle (DY150 to DY400) of
the converter.
Note: Refer to Section 3.4 "Cryogenic and High Process
Temperature Version Insulation" and install it rightly.
[DY015 to DY100] [DY150 to DY400]
Bracket Nozzle
Heat-Insulator Heat-Insulator
digitalYEWFLO digitalYEWFLO
Flushing of the pipe line:
Flush and clean scale, incrustation and sludge on the inside of
pipe for newly installed pipe line and repaired pipe line before the
operation. For fl ushing, the fl ow should fl ow through bypass-piping
to avoid damaging the fl owmeter. If there is no bypass-piping,
install short pipe instead of the fl owmeter.
Short pipe
digitalYEWFLO
 Mounting Precautions
WARNING
In case of high process temperature, care
should be taken not to burn yourself because
the surface of body and case reach a high
temperature.
(1) Gas or Steam Measuring Precautions
• Piping to Prevent Standing Liquid
Mount digitalYEWFLO in a vertical pipeline
to avoid liquid traps. When digitalYEWFLO
is installed horizontally, raise that part of
the pipeline in which the digitalYEWFLO is
installed.
F0302.ai
(Good)
(Good)
(No Good)
Flow
Flow
Flow
(2) Liquid Measurement Precautions
To insure accurate measurement, the
digitalYEWFLO must always have a full pipe.
• Piping Requirements for Proper Operation
Allow the fl ow to fl ow against gravity. When
the fl ow is moving with gravity, lift the down-
stream pipe length above the digitalYEWFLO
installation level to maintain full pipeline.
Flow
Flow
Flow
Flow
(No Good) (No Good)
(Good)
(Good)
h h>0
h
h>0
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