Yokogawa ADMAG AXR - Manual (Page 19)

<3. INSTALLATION>
3-7
IM 01E30D01-01EN
Table 3.3.3 Wafer Type Tightening Torque Values for Metal Piping and Permeable Fluids
Tightening torque values for PFA lining type (N-m / {kgf-cm} / [in-lbf])
Gasket types
within flowtube
No gasket (standard)
Gasket types
for user’s
flange
PTFE-sheathed non-asbestos gasket (optional codes BCF and BSF), or the equivalent in hardness
Flange ratings
Size
mm (inch)
JIS 10K, ANSI Class 150, and DIN PN10 JIS 20K, ANSI Class 300, and DIN PN16 DIN PN40
25 (1.0) 34.9 to 40.1 / {355.9 to 408.9} / [308.9 to 354.9] 35.2 to 40.1 / {358.9 to 408.9} / [311.5 to 354.9] 32.3 to 37.1 / {329.4 to 378.3} / [285.9 to 328.4]
40 (1.5) 53.5 to 61.5 / {545.5 to 627.1} / [473.5 to 544.3] 54.2 to 61.5 / {552.7 to 627.1} / [479.7 to 544.3] 56.4 to 61.5 / {575.1 to 627.1} / [499.2 to 544.3]
3.3.2 Nominal Diameter 50 mm (2.0 in.) to
200 mm (8.0 in.), Wafer Type
IMPORTANT
Use bolts and nuts in compliance with the flange
ratings. When stud-type through-bolts are used,
be sure the outside diameter of the shank is
smaller than that of the thread ridge. Be sure to
choose a gasket with inner and outer diameters
that does not protrude inside the piping (refer to
Table 3.3.9). 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
connection can be changed. Refer to Section
10.1 to do this properly.
In case the fluid being measured flows against
the arrow direction, refer to this parameter J20:
Flow Direction in this user’s manual.
(2) Mounting Centering Devices
To maintain concentricity of the flowmeter with the
pipes, install centering devices. From the process
piping side, pass two through-bolts through the
four centering devices (two for each bolt) and
the adjacent two holes (the lower two holes for
horizontal mounting) of both of the flanges (refer
to Figure 3.3.2). Use the appropriate centering
devices according to the nominal diameter and the
flange ratings. The centering devices are engraved
with an identifying character. Use the appropriate
ones which meet the required specifications by
referring to Tables 3.3.7.
(3) Positioning the Flowmeter
Position the flowmeter so that the Mini-flanges and
the centering devices come in close contact with
each other. Be careful to prevent the four centering
devices from coming into contact with the housing.
If stud-type through-bolts are used, position them in
such a way that the four centering devices come in
contact with the bolt threads (refer to Figure 3.3.2).
Pass the other through-bolts through from the
process piping side.