SMC Networks KFG2-F Series Operation Manual page 5

2. Specific Product Precautions (1)
Design/Selection
Warning
(1) Check the specifications.
The product in this catalog is designed to be used
in compressed air systems (including vacuum)
only. If the product is used in an environment
where pressure or temperature is out of the
specified range, damage and/or malfunction may
result. (Refer to the specifications.)
Please consult with SMC when using a fluid other
than compressed air (including vacuum). We do
not guarantee against any damage if the product
is used outside of the specification range.
(2) Do not disassemble the product or make any
modifications, including additional
machining.
It may cause human injury and/or an accident.
Caution
(1) Keep the connection part of fittings and tubing
from rotating or oscillating movement.
The fittings may be damaged if they are used in
the above manner. Especially for swivel elbow,
repeated load applied from the connected tubing
may cause detachment from the stud.
(2) The tubing bending radius in the vicinity of the
fitting should be at least the minimum bending
radius of the tubing.
If the bending radius is less than the minimum
value, fittings may be damaged, or tubing may
crack or be crushed. The minimum bending radius
of the FR soft nylon tubing (TRS series), FR
double layer tubing (TRB series), antistatic soft
nylon tubing (TAS series), polyolefin tubing (TPH
series), soft polyolefin tubing (TPS series) is
measured as following in accordance with JIS
B8381. Tubing deformation ratio at the minimum
bending radius is obtained through the following
formula, based on tubing diameter and mandrel
diameter by wrapping the same radius mandrel
tube.
Tube deformation ratio at the minimum
bending radius
 
L - D
 
 
η 1
 2d 
Here, η: Deformation ratio (%)
d: Tubing diameter (mm)
L: Measured length (mm)
D: Mandrel diameter (mm)
(Twice against the minimum
bending radius)
Test temperature: 20 +/5
Relative humidity: 65 +/5%

100
o
C
(3) Do not use fluids other than listed on the
specifications.
Applicable fluids are air, water and steam. Please
consult with SMC if using other fluids.
(4) When it is used with water, the fittings or tubing
may be damaged depending on the surge
pressure.
(5) Surge pressure must be under the maximum
operating pressure. If the surge pressure
exceeds the maximum operating pressure, it
will result in damage to fittings and tubing.
(6) When using the swivel elbow, particles may be
generated by rotation for positioning after
connecting. If you are concerned about the
effects on machinery and equipment, check the
particle generation with your machine before
use.
Warning
(1) Operation manual
Install the products and operate them only after
reading the operation manual carefully and
understanding its contents. Also, keep the manual
where it can be referred to as necessary.
(2) Ensure sufficient space for maintenance
activities.
When installing the products, allow access for
maintenance.
(3) Adhere to the thread tightening method.
When installing the products, refer to "Connection
Thread Tightening Method".
(4) There may be cases of the tubing detaching
from the
uncontrollably due to tubing degradation or
fitting breakage.
To prevent
uncontrollable, fit the tubing with a protective cover
or fix it in place.
Caution
(1) Preparation before piping
Before piping is connected, it should be thoroughly
blown out with air (flushing) or washed to remove
chips, cutting oil and other debris from inside the
pipe.
(2) Winding of sealant tape
When screwing together pipes and fittings, etc., be
Mandrel
certain that chips from the pipe threads and sealant
do not get inside the pipe. Also, when the sealant
tape is used, leave approximately 1 thread ridge
exposed at the end of the threads.
- 5 -
Mounting/ Piping
fitting and thrashing
the situation from
around
becoming