SMC Networks KFG2 Series Operation Manual page 6

2. Specific Product Precautions (2)
Mounting/ Piping
(3) Check the model, type and size before
installation. Also, confirm that there are no
scratches, gouges or cracks on the product.
(4) When connecting the tubing, take pressure
or possible changes to the tubing length
into account, and allow a sufficient margin.
Failure to do so may result in fitting breakage or
detachment of the tubing. Refer to the
recommended piping conditions.
(5) Do not apply unnecessary forces such as
twisting, pulling, moment loads, vibration
and impact, etc. on fittings or tubing.
This will cause damage to the fittings and will
crush, burst or release tubing.
(6) Tubing, with the exception of coiled tubing,
requires stationary installation. Do not use
standard tubing (non-coiled) in applications
where tubing is required to travel inside the
flexible protection tube. Tubing that travels
may sustain abrasion,
severance due to tensile force, or may result
in removal of tubing from fitting. Use
caution prior to use for proper application.
(7) To install the fitting, screw the fitting in
using the hexagonal face of the body, and
tighten with an appropriate wrench.
Affix the wrench at the base of the thread. If the
size of hexagonal face and wrench do not
match, or tightening takes place near the tube
side, it may cause collapse or deformation of
the hexagonal face, or damage to the
equipment. After installing, confirm that there is
no damage to the fitting, etc.
(8) The swivel elbow rotation is only for
positioning after mounting the product.
It is not intended for repeated rotation or
oscillation, which will cause wear, resulting in
metal particles which may enter the operating
fluid or cause fitting damage.
Piping Method
Caution
(1) Take a tube having no flaws on its periphery
and cut it off at right angles. (Use SMC's
tube cutter TK-1, 2, 3, 5 or 6 for cutting. Do not
use pinchers, nippers or scissors, etc.)
The tubing might be cut diagonally or flattened,
making installation impossible or causing
problems such as disconnection and leakage.
(2) Insert the tube into the union nut with the
union nut removed. Grab the tube and
gently push it throughly into the fitting.
extension, or
Union nut tightening direction
- 6 -
(3) After insertion, tighten the union nut
temporarily by hand.
(4) Fix the body with a tool. Tighten the union
nut to the end surface of the body using a
suitable wrench.
Hex. across flats may be deformed, if using
an improper wrench for hex. across flats.
If the body is not secured with a tool, this may
cause breakage. (In particular, for the swivel
elbow, the stud may come off).
(5) Fix the body with a tightening tool.
Tighten the union nut to the end surface
of the body using a suitable wrench.
Hex. across flats may be deformed, if using
an improper wrench for hex. across flats.
Tighten the union nut with the proper
tightening torque shown below.
Fitting size Proper tightening torque [N・m]
KFG2□01
KFG2□03
KFG2□04
KFG2□06
KFG2□07
KFG2□08
KFG2□09
KFG2□10
KFG2□11
KFG2□12
KFG2□13
KFG2□16
Body securing tool
Union nut tightening tool
2 to 3
3 to 4
5 to 6
8 to 10
10 to 12
16 to 18