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Cutting/Flaring the pipes
1 . Make sure that you have the required tools available . (pipe cutter, reamer, flaring tool and pipe holder)
2 . If you wish to shorten the pipes, cut it with a pipe cutter, taking care to ensure that the cut edge remains at a 90° angle
with the side of the pipe . Refer to the illustrations below for examples of edges cut correctly and incorrectly .
Oblique
Rough
Burr
3 . To prevent any gas from leaking out, remove all burrs at the cut edge of the pipe, using a reamer .
4 . Slide a flare nut on to the pipe and modify the flare .
Outer Diameter (D)
Depth (A)
ø6 .35 mm(1/4")
1 .3 mm
ø9 .52 mm(3/8")
1 .8 mm
ø12 .70 mm(1/2")
2 .0 mm
ø15 .88 mm(5/8")
2 .2 mm
ø19 .05 mm(3/4")
2 .2 mm
5 . Check that the flaring is correct, referring to the illustrations below for examples of incorrect flaring .
Uneven
Thickness
Cracked
Damaged
Surface
Inclined
Correct
6 . Align the pipes and tighten the flare nuts first manually and then with a torque wrench, applying the following torque .
Valve
Flare nut
Valve cap
Pressure port cap
Valve needle
Pressure port
Wrench(mm)
N•m
Wrench(mm)
N•m
Wrench(mm)
N•m
Wrench(mm)
N•m
Wrench(mm)
N•m
1/4"
17
18
23
20
18
16~18 Allen(hex .) 5
9
-
0 .34
3/8"
22
42
23
20
18
16~18 Allen(hex .) 5
9
-
0 .34
1/2"
26
55
29
40
18
16~18 Allen(hex .) 5
13
-
0 .34
5/8"
29
65
29
40
18
16~18 Allen(hex .) 5
13
-
0 .34
3/4"
36
100
38
40
18
16~18 Allen(hex .) 5
13
-
0 .34
❋
❋
1 N·m = 10 kgf·cm
•
If the pipes require brazing ensure that OFN(Oxygen Free Nitrogen) is flowing through the system .
•
Nitrogen blowing pressure range is 0 .02 ~ 0 .05 MPa .
CAUTION
CAC GD-EU_IM_32793A-23_EN.indd 28
2016-05-25 오후 7:08:43