2．Specific Product Precautions - SMC Networks KR-W2 Series Operation Manual

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.
(3) Check if PTFE can be used in application.
PTFE powder (Polytetrafluoroethylene resin) is
included in the sealant. Confirm that the use of
it will not cause any adverse affect on the
system.
(4) When operating at a high temperature, the
fittings and tubing will also become very
hot.
Touching the product may result in burns, so
be sure to take safety measures before
coming into direct contact with the product.
Caution
(1) Keep the connection part of fittings and
tubing from rotating or oscillating movement.
Use Rotary One-touch Fittings (KS or KX
Series) in these cases.
The fittings may be damaged if they are used in
the above manner.
(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 damage, 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.
Design/Selection
Caution
Tube deformation ratio at the minimum bending
radius
 
L - D
  
 
η 1 100
 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 (%)
(3) Do not use fluids other than listed on the
specifications.
Applicable fluids are air and water. 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) Depending on the storage or operating
environment and the period of storage or
use, the surface of the brass (C3604) may
blacken. If the discoloration of the brass is a
problem, we recommend selecting
electroless nickel-plated brass instead.
Example) KRH06-01SW2-X2
(6) The dimensions shown in the dimension
drawings are merely reference dimensions.
The actual dimensions will vary depending
on the tolerance. Be sure to provide
sufficient clearance around the fitting for
piping. Please contact SMC if you are
planning to mount the product in a narrow
space.
Mounting/ Piping
Warning
(1) Operation Manual
Install the products and operate them only after
reading the operation
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 fitting and thrashing around uncontrollably
due to tubing degradation or fitting breakage.
To prevent
uncontrollable, fit the tubing with a protective cover
or fix it in place.
- 4 -
o C
manual carefully and
the situation from becoming