– 14 –
A
ØD
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.
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 adjustment.
Fig. 3-2-1 Flare processing dimensions
Table 3-2-3 Dimensions related to flare processing for R410A
Table 3-2-4 Dimensions related to flare processing for R22
Table 3-2-5 Flare and flare nut dimensions for R410A
Nominal
diameter
1/4
3/8
1/2
5/8
Outer diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
Dimension (mm)
A
B
C
D
9.1
9.2
6.5
13
13.2
13.5
9.7
20
16.6
16.0
12.9
23
19.7
19.0
16.0
25
Flare nut width
(mm)
17
22
26
29
Nominal
diameter
1/4
3/8
1/2
5/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
A (mm)
Flare tool for R410A
Conventional flare tool
clutch type
Clutch type
Wing nut type
0 to 0.5
1.0 to 1.5
1.5 to 2.0
0 to 0.5
1.0 to 1.5
1.5 to 2.0
0 to 0.5
1.0 to 1.5
2.0 to 2.5
0 to 0.5
1.0 to 1.5
2.0 to 2.5
Nominal
diameter
1/4
3/8
1/2
5/8
Outer
diameter
(mm)
6.35
9.52
12.70
15.88
Thickness
(mm)
0.8
0.8
0.8
1.0
A (mm)
Flare tool for R22
Conventional flare tool
clutch type
Clutch type
Wing nut type
0 to 0.5
0.5 to 1.0
1.0 to 1.5
0 to 0.5
0.5 to 1.0
1.0 to 1.5
0 to 0.5
0.5 to 1.0
1.5 to 2.0
0 to 0.5
0.5 to 1.0
1.5 to 2.0
