JOHNSON CONTROLS
50
FORM 201.30-ICOM1 (519)
ISSUE DATE: 05/22/2019
SECTION 3 - HANDLING, STORAGE, INSTALLATION AND REASSEMBLY
Assembly of O-ring Face Seal Fittings
The male end and female nut of face seal fittings have
UN/UNF straight threads. An elastomeric O-ring is fit-
ted into the grooved male end. During assembly, the O-
ring is firmly sandwiched between the sealing surfaces.
Sealing is thus affected and maintained by the O-ring
compression which results from the clamping force
generated by tightening the nut. The straight threads do
NOT offer sealing action; they provide the resistance
(holding power) for service pressure.
O-ring Face Seal Assembly
1. Inspect to ensure that both matching parts are free
of burrs, nicks, scratches or any foreign particles.
2. Install O-ring in grooved face seal end of fitting,
if it is NOT pre-installed, use care NOT to nick
the O-ring.
3. Lubricate O-ring with a light coat of synthetic
Polyolester (POE) oil or POE grease.
4. Thread the nut by hand, and tighten nut to the ap-
propriate torque value shown in
TABLE 14 -
ASSEMBLY TORQUE METRIC FOR
METRIC TUBE FITTINGS
FITTING
SIZE
PORT
THREAD SIZE
TORQUE
FT-LB
N-M
M10
M10 x 1
17
23
M12
M12 x1.5
24
33
M14
M14 x 1.5
34
46
M16
M16 x 1.5
46
63
M18
M18 x 1.5
61
83
M22
M22 x 1.5
94
127
M27
M27 x 2
139
189
M30
M30 x 2
167
226
M33
M33 x 2
194
263
M42
M42 x 2
265
359
M48
M48 x 2
302
410
M60
M60 x 2
359
487
BRAZED JOINTS
For personnel safety: No brazing or heat
working shall be done unless the refriger-
ant is removed and inert gas is installed
into the system.
Assembling Brazed Joints
Tubing ends shall be cut square to permit full inser-
tion into the female part of the joint, shall have circular
cross-section and shall be free of flat spots, dents, or
wrinkles. Fitting cups shall be circular cross-section
and free of flat spots. Joint insertion depth shall con-
form to dimensions shown in
except for butt joints using filler metal suitable for a
butt joint.
Содержание YVWA
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