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c) Insertion of Flare Nut
d) Flare Processing
Make certain that a clamp bar and copper
pipe have been cleaned.
By means of the clamp bar, perform the flare
processing correctly.
Use either a flare tool for R410A or conven-
tional flare tool.
Table 2-2-3 Dimensions related to flare processing for R410A
Outer
Nominal
diameter
diameter
(mm)
1/4
6.35
3/8
9.52
1/2
12.70
Table 2-2-4 Dimensions related to flare processing for R22
Outer
Nominal
diameter
diameter
(mm)
1/4
6.35
3/8
9.52
1/2
12.70
Nominal
Outer diameter
diameter
(mm)
1/4
6.35
3/8
9.52
1/2
12.70
Thickness
(mm)
0.8
0.8
0.8
Thickness
(mm)
0.8
0.8
0.8
Table 2-2-5 Flare and flare nut dimensions for R410A
Thickness
(mm)
0.8
0.8
0.8
Flare processing dimensions differ according
to the type of flare tool. When using a con-
ventional flare tool, be sure to secure "dimen-
sion A" by using a gauge for size adjust-
ment.
Fig. 2-2-1 Flare processing dimensions
Flare tool for
R410A clutch type
0 to 0.5
0 to 0.5
0 to 0.5
Flare tool for
R22 clutch type
0 to 0.5
0 to 0.5
0 to 0.5
Dimension (mm)
A
B
9.1
9.2
13.2
13.5
16.6
16.0
– 28 –
ØD
A
A (mm)
Conventional flare tool
Clutch type
Wing nut type
1.0 to 1.5
1.0 to 1.5
1.0 to1.5
A (mm)
Conventional flare tool
Clutch type
Wing nut type
0.5 to 1.0
0.5 to 1.0
0.5 to1.0
C
D
6.5
13
9.7
20
12.9
23
1.5 to 2.0
1.5 to 2.0
2.0 to 2.5
1.0 to 1.5
1.0 to 1.5
1.5 to 2.0
Flare nut
width
(mm)
17
22
26
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