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3.3
Integral Flowmeter and
Remote Sensor Installation
WARNING
• All gaskets used for piping of magnetic flowmeters
should be prepared by customers except in some
cases.
• To avoid damaging the flange surface of the sensor,
do not use spiral wound gaskets.
NOTE
• The tightening torque of gasket varies depending
on the type and the external dimensions of the lining
and the gasket. The tightening torque values and
the corresponding gasket types are indicated in the
tables of this section. The dimensions the gasket
used for piping-side flange should be decided by
referring to Subsection 3.3.3.
• For fluids capable of potentially permeating PTFE
linings (such as nitric acid, hydrofluoric acid, or
sodium hydrate at high temperatures), do not use
the PTFE lining type.
• The PTFE lining has a structure adhering PTFE to
the metal inner face of the sensor. When install to
the piping, be careful not to bring unequal stress or
torque to the PTFE lining.
• For the PTFE lining, it is recommended to be
installed with grounding rings, or to be installed with
short pipes at upstream and downstream sides.
3.3.1 Size 25 to 200 mm (1 to 8 in.),
Wafer Type
IMPORTANT
Use bolts and nuts in compliance with the flange
ratings. When stud-type through-bolts are used, be sure
the outside diameter of the shank is smaller than that of
the thread ridge.
Be sure to choose a gasket with inner and outer
diameters that does not protrude inside the piping (read
Subsection 3.3.3). If the inner diameter of the gasket is
too large, or outer diameter of the gasket is too small,
fluid leakage may result.
<3. Installation>
(1) Mounting Direction
Mount the flowmeter so that the flow direction of the fluid
to be measured is in line with the direction of the arrow
mark on the flowmeter.
IMPORTANT
If it is impossible to match the direction of the arrow
mark, the direction of the cable entry can be changed.
Read Section 3.5.
In case the fluid being measured flows against the
arrow direction, change the value from "Forward" to
"Reverse" at the parameter "Flow direct". Read the
user's manual of the applicable communication type (for
AXW/AXW4A/AXG1A) or the hardware/software edition
(for AXFA11) as listed in Table 1.1.
Display Menu Path (AXW/AXW4A/AXG1A):
Device setup ► Detailed setup ► AUX calculation ► Flow direct
(2) Mounting Centering Devices
To maintain concentricity of the flowmeter with the pipes,
install centering devices. Use the appropriate centering
devices according to the nominal diameter and the flange
ratings.
• Size: 25 to 40 mm (1 to 1.5 in.)
Pass two through-bolts through the adjacent holes of
both flanges and position the flowmeter so that the
Mini-flanges and the centering devices come in close
contact with each other.
In case stud-type through-bolts are used, position
them in such a way that the centering devices come in
contact with the bolt threads.
Pass the other through-bolts through the other holes.
See Figure 3.3.2 for the mounting.
• Size: 50 to 200 mm (2 to 8 in.)
From the process piping side, pass two through-bolts
through the adjacent two holes (the lower two holes
for horizontal mounting) of both of the flanges and the
four centering devices (two for each bolt). Be careful
to prevent the four centering devices from coming into
contact with the sensor housing.
In case stud-type through-bolts are used, position
them in such a way that the four centering devices
come in contact with the bolt threads.
Pass the other through-bolts through the other holes.
See Figure 3.3.3 for the mounting.
NOTE
For Size 50 to 200 mm (2 to 8 in.), the centering devices
are engraved with an identifying character. Be sure
to use the appropriate ones which meet the required
specifications by referring to Table 3.3.3.
13
3
IM 01E24A01-01EN
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