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
Flare processing dimensions differ according to the type of
flare tool.
When using a conventional flare tool, be sure to secure
“dimension A” by using a gauge for size adjustment.
Fig. 6-2-1 Flare processing dimensions
A
ØD
Table 6-2-5 Flare and flare nut dimensions for R22
Nominal
diameter
1/4
3/8
1/2
5/8
3/4
Outer
diameter (mm)
6.4
9.5
12.7
15.9
19.1
Thickness
(mm)
0.8
0.8
0.8
1.0
1.0
Dimension (mm)
A
C
B
B
9.1
9.2
6.5
13
13.0
13.5
9.7
20
16.2
16.0
12.9
20
19.4
19.0
16.0
23
23.3
24.0
19.2
34
Flare nut width
(mm)
17
22
24
27
36
Nominal
diameter
1/4
3/8
1/2
5/8
3/4
Outer
diameter (mm)
6.4
9.5
12.7
15.9
19.1
Thickness
(mm)
0.8
0.8
0.8
1.0
1.2
Dimension (mm)
A
B
B
C
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
24.0
—
19.2
28
Flare nut width
(mm)
17
22
26
29
36
Nominal
diameter
1/4
3/8
1/2
5/8
3/4
Outer
diameter
(mm)
6.4
9.5
12.7
15.9
19.1
Thickness
(mm)
0.8
0.8
0.8
1.0
1.2
A (mm)
Flare tool for
R410A, R22
clutch type
0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5
0 to 0.5
Conventional flare tool
(R410A or R32)
Clutch type Wing nut type
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
1.5 to 2.0
1.0 to 1.5
2.0 to 2.5
1.0 to 1.5
2.0 to 2.5
1.0 to 1.5
2.0 to 2.5
Conventional flare tool
(R22)
Clutch type Wing nut type
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.0 to 1.5
0.5 to 1.0
1.5 to 2.0
0.5 to 1.0
1.5 to 2.0
—
—
R410A/R32 or conventional flare tool.
Table 6-2-3 Dimensions related to flare processing for R410A or R32 / R22
Table 6-2-4 Flare and flare nut dimensions foorr
R410A or R32
D
D
- 31 -