YOKOGAWA AXG1A Installation Manual page 20

Size 150 to 200 mm (6 to 8 in.) is specified, hang the
grounding rings with their flange type printings outer side
of the magnetic flowmeter.
Set the angle of both handles symmetrically to be top.
If there are any bolt-holes under the handles, turn the
grounding rings clockwise in order to locate handles
between bolt-holes. Center the grounding ring to the
center of the magnetic flowmeter.
Size 250 to 400 mm (10 to 16 in.) is specified, hang the
grounding rings with their flange type printings outer side
of the magnetic flowmeter.
Set the angle of both handles symmetrically to be 45
degree from top. If there are any bolt-holes under the
handles, turn the grounding rings clockwise in order to
locate handles between bolt-holes. Center the grounding
ring to the center of the magnetic flowmeter.
Connect the wire from the grounding ring to the screw of
the magnetic flowmeter's flange and fix the wire by the
screw. This procedure must be done for the both sides of
the magnetic flowmeter.
Table 3.3.5 Printing and Flange Rating
Printing
ASME 150
ASME 300
PN10
PN16
10K
20K
F12
Centering Pin
Printing of
Flange Type
Screw: Connect
Centering Pin
the wire from the
grounding ring or
the customer's
pipe
Note: Size 150 to 200 mm (6 to 8 in.), PTFE lining, and with
grounding ring are specified, the handle is one.
Figure 3.3.5 Mounting of grounding ring
Flange Type
ASME Class 150
ASME Class 300
EN PN10
EN PN16
JIS 10K
JIS 20K
JIS F12
Hole
Handle
Printed
Surface
Grounding Ring
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<3. Installation>
• Installation: PTFE/Natural hard rubber lining type
and Metal pipe
When a magnetic flowmeter with PTFE or natural
hard rubber lining is installed to metal pipe without
lining, the installation method without grounding ring
is recommended.
Size 25 to 125 mm (1 to 5 in.), PTFE lining,
and without grounding ring are specified, it is
recommended to use no gasket between the pipe
and the sensor. With grounding wire (supplied by
customer), connect between the pipe and the sensor
flange, or between the transmitter and the grounding
terminal of terminal box. For grounding in detail, read
Subsection 4.4.3.
Size 150 to 400 mm (6 to 16 in.), PTFE or natural
hard rubber lining, and without grounding ring are
specified, use the gasket A (customer pipe side) for
connection with customer pipes. With grounding wire
(supplied by customer), connect between the pipe
and the sensor flange, or between the transmitter and
the grounding terminal of terminal box. For grounding
in detail, read Subsection 4.4.3.
For gasket A (customer pipe side), use non-asbestos
joint sheet gasket, PTFE-sheathed non-asbestos joint
sheet gasket or gasket with the equivalent hardness.
For gasket B (sensor side), use non-asbestos joint
sheet gasket, PTFE-sheathed non-asbestos joint
sheet gasket or gasket with the equivalent hardness.
It is recommended to use gasket with same hardness
for gasket A and B.
• Installation without grounding ring
Customer pipe
(Metal)
A
With grounding wire, connect between the pipe and the sensor flange,
or between the transmitter and the grounding terminal of terminal box.
Gasket A
to be supplied by customer
(Size 25 to 125 mm (1 to 5 in.), and PTFE lining are specified, Gasket
A is unnecessary.)
• Installation with grounding ring
Grounding ring
Customer pipe
(Metal)
A B
Gasket A
to be supplied by customer
Gasket B
to be supplied by customer
19
Customer pipe
(Metal)
A
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Customer pipe
(Metal)
B A
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IM 01E24A01-01EN
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