-
94
-
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 conventional flare tool.
Flare processing dimensions differ according to the type of flare tool. Be careful.
When using a conventional flare tool, be sure to secure “dimension A” by using a
gage for size adjustment.
øD
A
Fig.3 Flare processing dimensions
Table 5. Dimensions related to flare processing for R410A
Table 6. Dimensions related to flare processing for R22
Fig.4 Relations between flare nut and flare seal surface
B
A
C
D
Table 7. Flare and flare nut dimensions for R410A
Nominal
diameter
Outer diameter
(mm)
Thickness
(mm)
Dimension (mm)
Flare nut width
A
B
C
D
1/4
6.35
0.8
9.1
9.2
6.5
13
17
3/8
9.52
0.8
13.2
13.5
9.7
20
22
1/2
12.7
0.8
16.6
16.0
12.9
23
26
[unit: mm]
Nominal
diameter
Outer diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for R410A
Clutch type
Conventional flare tool
Clutch type
Wing nut type
1/4
6.35
0.8
0~0.5
1.0~1.5
1.5~2.0
3/8
9.52
0.8
0~0.5
1.0~1.5
1.5~2.0
1/2
12.7
0.8
0~0.5
1.0~1.5
2.0~2.5
Nominal
diameter
Outer diameter
(mm)
Thickness
(mm)
A (mm)
Flare tool for R410A
Clutch type
Conventional flare tool
Clutch type
Wing nut type
1/4
6.35
0.8
0~0.5
0.5~1.0
1.0~1.5
3/8
9.52
0.8
0~0.5
0.5~1.0
1.0~1.5
1/2
12.7
0.8
0~0.5
0.5~1.0
1.5~2.0
