Yokogawa digitalYEWFLO (DY) - Manual (Page 11)

<3. INSTALLATION>
3-1
IM 01F06A00-01EN
3. INSTALLATION
WARNING
This instrument must be installed by expert
engineer or skilled personnel. The procedures
described in this chapter are not permitted for
operators.
3.1 Installation Precautions
(1) Ambient Temperature
Avoid an area which has wide temperature
variations. When the installation area is
subjected to heat radiation from process plant,
ensure adequate heat prevention or ventilation.
(2) Atmospheric Conditions
Avoid installing the vortex fl owmeter in a
corrosive atmosphere. When the vortex
fl owmeter must be installed in a corrosive
atmosphere, adequate ventilation must be
provided
(3) Mechanical Shock or Vibration
The vortex fl owmeter is of sturdy construction,
but select an area subject to minimize
mechanical vibration or impact shock. If
the fl owmeter is subject to vibrations, it is
recommended that pipeline supports to be
provided as shown in Figure 3.1.
F0301.ai
digitalYEWFLO
Vortex Flowmeter
Pipeline
Pipeline Support
Figure 3.1 Example of Pipeline Support
(4) Precautions Regarding Piping
(a) Ensure that the process connector bolts are
tightened fi rmly.
(b) Ensure that no leak exists in the process
connection pipeline.
(c) Do not apply a pressure higher than the
specifi ed maximum working pressure.
(d) Do not loosen or tighten the fl ange mounting
bolts when the assembly is pressurized.
(e) Handle the vortex fl owmeter carefully when
measuring dangerous liquids, so that the liquids
do not splash into eyes or on face. When using
dangerous gases, be careful not to inhale them.
(5) Other Considerations
• Choose a location where is suffi cient clearance
around digitalYEWFLO exist to allow such work
as routine inspections.
• Choose a location that ensures easy wiring and
piping.
3.2 Piping Precautions
 Straight Pipe Length and
Recommendations
Refer to Table 3.1 about Valve Position and
Straight Pipe Length and so on.
● Piping support
Typical vibration immunity level is 1G for normal
piping condition.Piping support should be fi xed in
case of over 1G vibration level.
● Installation direction
If a pipe is always fi lled with liquids, the pipe can be
installed vertically or at inclined angle.
● Adjacent pipes
The process pipline inner diameter should be larger
than the digitalYEWFLO inner diameter.
Use the following adjacent pipe.
Model Code Adjacent Pipe
DY015 up to DY050
DY025/R1 up to DY080/R1
DY040/R2 up to DY100/R2
Sch40
or larger inner
diameter than
Sch40
DY080 up to DY400
DY100/R1 up to DY200/R1
DY150/R2 up to DY200/R2
Sch80
or larger inner
diameter than
Sch80