YOKOGAWA AXFA14G - Page 11

Table 3.3.1 Fitting Dimensions
D
øA
4
(0.16)
11.5(0.45)
30(1.18)
øB
øC
0
-0.1
Screw joint (process connection codes: GUR and GUN)
Unit : mm (approx. inch)
F0309.ai
Size Code øA øB øC D
2.5 (0.1)
GUR 22 (0.87) 8 (0.31) 18.5 (0.73) R1/4
GUN 22 (0.87) 8 (0.31) 18.5 (0.73) NPT1/4
5 (0.2)
GUR 22 (0.87) 8 (0.31) 18.5 (0.73) R1/4
GUN 22 (0.87) 8 (0.31) 18.5 (0.73) NPT1/4
10 (0.4)
GUR 25 (0.98) 10 (0.39) 22.5 (0.89) R3/8
GUN 25 (0.98) 10 (0.39) 22.5 (0.89) NPT3/8
øA
øB
4
(0.16)
35(1.38)
10(0.39)
+0.3
0
0
-0.1
øC
øD
Weld joint (process connection code: GUW)
Unit : mm (approx. inch)
F0310.ai
Size Code øA øB øC øD
2.5 (0.1) GUW 22(0.87) 8(0.31) 14.3(0.56) 18.5(0.73)
5 (0.2) GUW 22(0.87) 8(0.31) 14.3(0.56) 18.5(0.73)
10 (0.4) GUW 25(0.98) 10(0.39) 17.8(0.70) 22.5(0.89)
(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. Refer to the applicable user’s manuals
which can be downloaded from our website.
Incasetheuidbeingmeasuredowsagainstthe
arrowdirection,changethevaluefrom“Forward”to
“Reverse”attheparameter[J20:FlowDirection]
(refer to Chapter 8).
(2) Connecting Process Piping
Weldorscrewtheconnectionttingstotheprocesspiping.
IMPORTANT
• Besuretopasstheconnectionttingsthroughthe
union joint nuts in advance.
• Whenweldingthettings,payattentiontothe
edge preparation, level differences between the
ttingsandthepiping,andtheweldingcurrentto
avoid deforming the piping or causing stagnation
portionoftheuid.
(3) Positioning the Flowmeter
Installtheowmeteronamountingbaseandpositionit
sothatthecenteraxisoftheowtubeisalignedwiththat
of the process piping. Then screw the union joint nuts to
theconnectingportsoftheowmeter.
CAUTION
Ceramics pipes may be damaged if the nuts are
tightened when the center axes are not properly aligned.
(4) Tightening Nuts
Use a torque wrench to tighten the union joint nuts.
CAUTION
Tighten the union joint nuts according to the tightening
torquevaluesinTable3.3.2.Forpermeableuid(such
asnitricacid,hydrouoricacidorsodiumhydrateat
high temperature), tighten the nuts according to the
torque values in Table 3.3.3.
AsthegasketmaterialisuorocarbonPTFE,itis
possible that the nuts may loosen as time passes.
Retighten the nuts if this is the case. Be sure to use
the gasket (thickness is 1.5 mm) which comes with the
owmeter.
Table 3.3.2 Tightening torque values for Union Joint Type
Size mm (inch) Torque (N-m / {kgf-cm} / [in-lbf])
2.5 (0.1) 9 to 12 / {91.77 to 122.4} / [79.66 to 106.2]
5 (0.2) 9 to 12 / {91.77 to 122.4} / [79.66 to 106.2]
10 (0.4) 14 to 18 / {142.8 to 183.5} / [123.9 to 159.3]
Table 3.3.3 Tightening torque values for Union Joint Type
and Permeable Fluids
Size mm (inch) Torque (N-m / {kgf-cm} / [in-lbf])
2.5 (0.1) 11 to 15 / {112.2 to 153} / [97.36 to 132.8]
5 (0.2) 11 to 15 / {112.2 to 153} / [97.36 to 132.8]
10 (0.4) 17 to 23 / {173.4 to 234.5} / [150.5 to 203.6]
<3. Installation>
10
IM 01E20A01-01EN