Yokogawa ADMAG AXF - Manual (Page 25)

IM 01E20D01-01E 3-15
3. INSTALLATION
Size of Inner Diameter of Grounding ring and
Outer Diameter for Effective Sealing :
lining
øB øA
AXF Flowtube
Grounding ring
Gasket for
User’s flange
3.3.4 Nominal Diameter 2.5 mm (0.1
in.) to 400 mm (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 (refer to Table 3.3.13). 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 electrical con-
nection can be changed. Refer to Section 5.1 to
do this properly.
In case the fluid being measured flows against
the arrow direction, refer to the parameter J20:
Flow Direction in the user’s manual of the
AXFA11 Magnetic Flowmeter Remote Converter
(IM 01E20C01-01E) or the AXFA14 Magnetic
Flowmeter Remote Converter/AXF Integral
Flowmeter [Software Edition] (IM 01E20C02-
01E).
(2) Tightening Nuts
Tighten the bolts according to the torque values for the
metal piping in Table 3.3.14. For PVC piping, select an
optional code of GA, GC, or GD, use rubber gaskets
and tighten the nuts to the torque values for the PVC
piping in Table 3.3.15.
For permeable fluids (such as nitric acid, hydrofluoric
acid, or sodium hydrate at high temperatures), tighten
the nuts according to the torque values in Table 3.3.16.
CAUTION
For a flowmeter with fluorocarbon PFA lining, it
is possible that the nuts may loosen as time
passes, so tighten them regularly. Be sure to
tighten the nuts according to the prescribed
torque values. Tighten them diagonally with the
same torque values, step by step up to the
prescribed torque value.