24
Common Safety Instructions for Quick-Fitting Joint
5. Cautions on the removal of joint body
(1) When removing the joint body, loose it with a proper tool, using the outside or inside hexagon.
(2) Remove sealant sticking to the thread on the mating equipment. The sealant left sticking may enter
the peripheral equipment and cause trouble.
4. Cautions on the installation of joint body
(1) When installing the joint body, tighten it with a proper tool, using the outside or inside hexagon.
(2) In tightening the screw,
use the tightening torque recommended in Table 2.
・
Use of a torque higher than the recommended level may damage thread or deform gasket, thus
causing leaks.
・
Use of a torque lower than the recommended level may cause loose screw and leakage.
(3) With the joint whose piping direction will not change after tightening, make adjustment within the
recommended range of tightening torques.
Table 2. Tightening Torque, Sealock Color and Gasket Material
Thread type
Thread size
Tightening torque
Sealock color
Gasket material
Metric thread
M3×0.5
M5×0.8
M6×1.0
M6×0.75
M8×0.75
M5×0.8
0.7N·m (0.52lbf·ft)
1.0 ~ 1.5N·m (0.74 ~ 1.11lbf·ft)
1.8 ~ 2.3N·m (1.33 ~ 1.70lbf·ft)
0.8 ~ 1.0N·m (0.59 ~ 0.74lbf·ft)
1.0 ~ 2.0N·m (0.74 ~ 1.48lbf·ft)
1.0 ~ 1.5N·m (0.74 ~ 1.11lbf·ft)
−
SUS304, NBR
POM
(Polyacetal)
Taper pipe thread
R1/8
R1/4
R3/8
R1/2
7 ~ 9N·m (5.16 ~ 6.64lbf·ft)
12 ~ 14N·m (8.85 ~ 10.33lbf·ft)
22 ~ 24N·m (16.23 ~ 17.70lbf·ft)
28 ~ 30N·m (20.65 ~ 22.13lbf·ft)
White
−
Unified thread
N0.10-32UNF
1.0 ~ 1.5N·m (0.74 ~ 1.11lbf·ft)
−
SUS304, NBR
Pipe thread
General purpose
(inch)
1/16-28NPT
1/8-27NPT
1/4-18NPT
3/8-18NPT
1/2-14NPT
7 ~ 9N·m (5.16 ~ 6.64lbf·ft)
7 ~ 9N·m (5.16 ~ 6.64lbf·ft)
12 ~ 14N·m (8.85 ~ 10.33lbf·ft)
22 ~ 24N·m (16.23 ~ 17.70lbf·ft)
28 ~ 30N·m (20.65 ~ 22.13lbf·ft)
Gray
−
Caution: