YOKOGAWA ADMAG AXR - 3.3.2 Nominal Diameter 50 mm (2.0 in.) to 200 mm (8.0 in.), Wafer Type

<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owtube
No gasket (standard)
Gasket types
for user’s
ange
PTFE-sheathed non-asbestos gasket (optional code 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ange
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 (Read
Subsection 3.3.4). If the inner diameter of the
gasket is too large, or outer diameter of the
gasketistoosmall,uidleakagemayresult.
(1) Mounting Direction
Mounttheowmetersothattheowdirectionofthe
uidtobemeasuredisinlinewiththedirectionof
thearrowmarkontheowmeter.
IMPORTANT
If it is impossible to match the direction of
the arrow mark, the direction of the electrical
connection can be changed. Read Section 11.1
to do this properly.
Incasetheuidbeingmeasuredowsagainst
the arrow direction, read this parameter J20:
Flow Direction in this user’s manual.
(2) Mounting Centering Devices
Tomaintainconcentricityoftheowmeter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anges(Read
Figure 3.3.2). Use the appropriate centering
devices according to the nominal diameter and the
angeratings.Thecenteringdevicesareengraved
with an identifying character. Use the appropriate
oneswhichmeettherequiredspecicationsby
reading Table 3.3.7 and Table 3.3.8.
(3) Positioning the Flowmeter
PositiontheowmetersothattheMini-anges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 (Read Figure 3.3.2).
Pass the other through-bolts through from the
process piping side.