User's Manual AXF Magnetic Flowmeter Integral ... - Yokogawa

3. INSTALLATION
(3) Positioning the Flowmeter
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. Pass the other through-bolts
through the other holes (refer to Figures 3.3.2 and
3.3.3). 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.
(4) Tightening Nuts
Tighten the nuts according to the torque values for
metal piping in Table 3.3.4. For PVC piping, select an
option code of /GA, /GC, or /GD, use rubber gaskets
and tighten the nuts to the torque values for PVC
piping in Table 3.3.5.
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 3.3.6.
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.
*Through-bolt (four units)
*: These items can be ordered optionally.
If they are provided by the user, choose nuts and
bolts in compliance with the flange ratings.
*Nut (eight units)
Centering device (two units)
*Gasket (two units)
Mini-flange
Piping-side flange
F0310a.EPS
Horizontal mounting
F0310b.EPS
Vertical mounting
Figure 3.3.2
F0310c.EPS
Mounting Procedure for Wafer Type (size: 2.5 (0.1) to 15 mm (0.5 in.))
3-7
IM 01E20D01-01E