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- 7 -
Caution
(1)Connection and disconnection of tube from
one-touch fitting
①
Installation of tube
1)Cut the tube perpendicularly, being careful not
to damage the external surface. Use an SMC
tube cutter TK-1, 2, 3. Do not cut the tubing with
pliers, nippers, scissors, etc., otherwise the
tubing will be deformed and problems may
result.
2)The outside diameter of the polyurethane tubing
swells when internal pressure is applied to it.
Therefore, it may be impossible to re-insert the
tubing into One-touch fittings. Check the tubing
outside diameter, and when the accuracy of the
outside diameter is +0.07mm or larger
for φ2,
and +0.15mm or larger for other sizes, re-insert
it into the One-touch fitting without cutting the
tube.When the tubing is re-inserted into the
One-touch fitting, confirm that the tubing goes
through the release button smoothly.
3)Grasp the tubing, and slowly push it straight
into the One-touch fitting until it comes to a
stop.
4)Pull the tubing back gently to make sure it has a
positive seal. Insufficient installation may cause
air to leak or the tubing to release.
②
Removal of the tube
1)Push the release button flange evenly and
sufficiently to release the tube.Do not push in the
tubing before pressing the release button.
2)Pull out the tubing while keeping the release
button depressed. If the release button is not
held down sufficiently, the tubing cannot be
withdrawn.
3)To reuse the tubing, remove the previously
lodged portion of the tubing.If the lodged portion
is left on without being removed, it may result in
air leakage and make the removal of the tubing
difficult.
(2)Connection of the metal rod accessories
Do not use tube, resin plug, reducer, etc. after
connecting a fitting with a metal rod (KC series,
etc.) to a One-touch fitting. This can cause the
disconnection of tube.
(3)When mounting the tube, resin plug or metal
rod, do not press the release button.
Do not press the release button unnecessarily
before mounting tubing, resin plugs and metal
rods. This can cause the disconnection of tube.
(1)When connecting piping to the
One-touch fitting, use a pipe length
with sufficient margin, in
accordance with the piping
conditions shown in Figure 1.
Also, when using a tying band, etc.,
to bind the piping together, make
sure that external force does not
come to bear on the fitting.
(see Figure 2)
Warning
(1)Type of fluids
Please consult with SMC when using the
product in applications other than compressed
air.
(2)When there is a large amount of drainage
Compressed air containing a large amount of
drainage can cause the malfunction of
pneumatic equipment.An air dryer or water
separator should be installed upstream from
filters.
(3)Drain flushing
If condensation in the drain bowl is not emptied
on a regular basis,the bowl will overflow and
allow the condensation to enter the compressed
air lines.This causes the malfunction of
pneumatic equipment.If the drain bowl is difficult
to check and remove, the installation of a drain
bowl with an auto drain option is recommended.
For compressed air quality,refer to SMC catalog
"Compressed Air Purification System".
Air Supply
Precautions for One-Touch Tube Fittings
Mounting/ Piping
Recommended Piping Conditions
Unit
:
mm
tubing
size
Mounting pitch A
Straight-line
Pipe length
Nylon
tube
Soft nylon
tube
Polyurethane
tube
φ
3.2、
φ
1/8” 44 or more
35 or more
25 or more
16 or more
φ
4、
φ
5/32” 56 or more
44 or more
26 or more
20 or more
φ
3/16”
67 or more
52 or more
38 or more
24 or more
φ
6
84 or more
66 or more
39 or more
30 or more
φ
1/4”
89 or more
70 or more
57 or more
32 or more