– 10 –
Table 2-2-5 Flare and flare nut dimensions for R410A
Dimension (mm)
ABCD
9,1 9,2 6,5 13 17
13,2 13,5 9,7 20 22
16,6 16,0 12,9 23 26
19,7 19,0 16,0 25 29
Nominal Outer diameter Thickness
diameter (mm) (mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
Table 2-2-3 Dimensions related to flare processing for R410A
Nominal
Outer
Thickness
diameter
diameter
(mm)
(mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
A (mm)
Flare tool for
Conventional flare tool
R410A 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
Table 2-2-4 Dimensions related to flare processing for R22
Nominal
Outer
Thickness
diameter
diameter
(mm)
(mm)
1/4 6,35 0,8
3/8 9,52 0,8
1/2 12,70 0,8
5/8 15,88 1,0
A (mm)
Flare tool for
Conventional flare tool
R22 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
A
ØD
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.
Fig. 2-2-1 Flare processing dimensions
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.
Flare nut
width
(mm)
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