Yokogawa ADMAG CA - Manual (Page 20)

4.INSTALLATION
IM 1E8B0-01E
4-11
4.3.2 Nominal Diameter 50mm (2˝) to 200 m (8˝)
Please use appropriate bolts and nuts according to process connection. In
case stud type of through bolts are used, be sure outside diameter of a
shank is smaller than a thread ridge's one.
Please use compressed non-asbestos fiber gasket, PTFE gasket or the
gasket which has equal elasticity. In case of optional code/FRG, please
use rubber gasket or others which has equal elasticity. Be sure the inner
diameter of the gasket does not protrude to inner piping. (Refer to Table
4.3.6)
A : Mounting Direction
Please mount the Magnetic Flowmeter matching the flow direction of the fluid to be
measured with the direction of the arrow mark on the flowmeter.
If it is impossible to macth the direction, please never remodel to change
direction of the converter. In case the measuring fluid flows against the
arrow direction, please refer to the section 6.4.6 Reversing Flow Direction.
B : Mounting Centering Devices
To keep concentricity between the Flow Tube and pipes, centering devices must be used.
Pass two through-bolts through the four centering devices (two for each) and lower
adjacent holes of both flanges. (Refer to Figure 4.3.3)
Please give attention to the nominal size and flange ratings of the centering devices.
(Refer to Table 4.3.5)
C : Positioning Flow Tube
Position the Flow Tube coming in contact four centering devices with Mini-Flanges.
At this time, pay attention to avoid four centering devices come in contact with Housing.
In case stud type of through-bolts are used, position them coming in contact four
centering devices with thread of the bolts. (Refer to Figure 4.3.3)
After positioning the Flow Tube, pass remaining through-bolts to remaining holes.
D : Tightening Nuts
Please tighten the bolts according to Torque Values in Table 4.3.3. In case of PVC
piping, please select optional code /FRG, use rubber gasket and tighten with the torque
value in Table 4.3.4.
Please be sure to tighten the bolts following prescribed torque values.
Please tighten the flange bolts diagonally with the same torque values, step
by step up to the prescribed torque value.
IMPORTANT
IMPORTANT
CAUTION