3.3.2 Size 25 to 400 mm (1 to 16 in.),
Flange Type
IMPORTANT
Use bolts and nuts in compliance with the flange
ratings. 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.
(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) Installation of Gasket and Grounding
Device
The gaskets (supplied by customer) used for connection
with customer pipes differ by the presence or absence
of grounding device (grounding ring) and the specified
specifications. Be sure to use the gaskets in compliance
with the flange ratings and fluid specification. Install the
gaskets as the followings.
Be sure to choose gaskets with inner and outer diameters
that do not protrude inside the piping by referring to
Subsection 3.3.3.
WARNING
• All gaskets used for piping of magnetic flowmeters
should be prepared by customers except in some
cases.
• For the following cases, be sure to use a gasket
between the grounding ring and the lining flare
section, to prevent fluid leaks.
- Size 50 to 400 mm (2 to 16 in.), natural hard
rubber lining, and with grounding ring are
specified.
- Size 150 to 400 mm (6 to 16 in.), and PTFE lining,
and with grounding ring are specified.
- Above two conditions, grounding rings are added
at a later time.
• Be sure to choose the gasket with hardness
comparable to soft rubber or the PTFE-sheathed
non-asbestos gasket, or the equivalent in
hardness gasket depending on process pressure.
The thickness of the gasket should cover the
range shown in Table 3.3.4.
Table 3.3.4 Gasket thickness
Size mm
Gasket thickness (mm)
50 to 125 (2 to 5 in.)
2
150 to 400 (6 to 16 in.)
3 to 5
For size 25 to 125 mm, the grounding ring has mounting
fixing brackets (See Figure 3.3.4).
F0316.ai
Gasket
Screw
Washer
(PTFE lining type)
Grounding
ring
Figure 3.3.4 Mounting of grounding ring
Size 150 to 400 mm (6 to 16 in.), PTFE or natural hard
rubber lining, and with grounding ring are specified, the
grounding ring has handles (See Figure 3.3.5).
Handles of the grounding ring have some holes which
correspond to outer diameter of each flange type.
There are printings near each hole. The printings
show types of flange. See the Table 3.3.5. Confirm the
centering pin is fixed to the hole corresponding to flange
or fix the centering pin to the correct hole.
<3. Installation>
18
IM 01E24A01-01EN
