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2. Specific Product Precautions (4)
(6)Take note that if nylon tubing, soft nylon tubing
and antistatic tubing are used in a clean room.
The antioxidant on the surface of the soft nylon
tubing may come off, thereby lowering the
cleanness level.
(7)Do not use in environments where foreign
matter may stick to the product or get mixed in
the product's interior.
This may cause leakage or disconnection of the
tubing.
Warning
(1) Perform maintenance inspections according to
the procedures indicated in the operation
manual.
If handled improperly, malfunction and damage of
machinery of equipment may occur.
(2) Maintenance work
If handled improperly, compressed air can be
dangerous. The assembly, handling, repair, and
element replacement of pneumatic systems
should be performed by a knowledgeable and
experienced person.
(3) Drain flushing
Remove drainage from air filters regularly.
(4) Removal of equipment and supply/exhaust of
compressed air
When components are removed, first confirm that
measures are in place to prevent workpieces from
dropping, run-away equipment, etc. Then, cut off
the supply pressure and electric power, and
exhaust all compressed air from the system using
the residual pressure release function.
When the equipment is restarted, proceed with
caution
after
confirming
that
appropriate
measures are in place to prevent cylinders from
sudden movement.
Caution
(1) Be certain to wear safety glasses at all times
during periodical inspections.
(2) During regular maintenance, check for the
following and replace any components as
necessary.
a) Scratches, gouges, abrasion, corrosion
b) Leakage
c) Flattening or distortion of tubing
d) Hardening, deterioration or softness of tubing
e) Loosening of the union nut
(3) Do not repair the fittings or patch the tubing for
reuse.
(4) After operation at a high temperature, leakage
may occur due to time dependent change of
the tube material. If leakage occurs, remove
the tube, cut off the connecting part of the tube,
and connect to the piping again.
Check if the tube dimension accuracy is within the
recommended tolerance. If it is difficult to take the
tube out of the body, bend the tube to the side to
remove.
Caution
(1) First, tighten the fitting by hand, then use a
wrench appropriate for the hexagon flats of the
body to tighten it.For a tightening torque guide,
see the table below.
If the fitting is tightened with excessive torque, it
may break.
Connection thread size
Tightening torque [N
・
m]
M5
1 to 1.5
G1/8
3 to 5
G1/4
8 to 12
G3/8
15 to 20
G1/2
20 to 25
(2) Insufficient tightening may cause seal failure,
or loosen the threads.
Caution
(1) When using the KFG2H*-E series with tubing
other than those from SMC, the products are
not subject to warranty.
Connection Thread Tightening Method
Maintenance
Tube
Body
Precautions for use with non-SMC
Operating Environment
2021-03-30 17:38
DP105573
