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VCC
Specific Product Precautions 3
Be sure to read this before handling the products.
Refer to back page 50 for Safety Instructions and pages 17 to 19 for 2 Port Solenoid
Valve for Fluid Control Precautions.
Design
Warning
1. Leakage detection port
The valve has leak detection area to completely separate the
fluid area and pilot pressure area. If leakage is found, valve re-
placement and maintenance are necessary immediately. Flu-
ids that solidify or being cured may block the leak detection so
port and leak may not be detected.
2. If applying high voltage to the fluid, it must be
earthed by using the bolt to mount the base.
Do not use sealing tape when piping, as it may insulate.
Selection
Caution
1. Operating fluid
Eliminate all solid material larger than 150 µm in the fluid to
avoid valve failure.
Piping
Caution
1. Piping to pilot port
Condensation may be formed in the piping to the pilot port,
due to factors such as its length. The life of the valve will be
shortened if condensed moisture enters the pilot port. To pre-
vent condensation, the installation of a quick exhaust is rec-
ommended.
2. Tube attachment/detachment for One-touch fittings/
stainless steel fittings
1) Attaching of the tubing
a Divide a tube with no external flaws at a right angle. Use
tube cutter TK-1, 2, or 3 when dividing the tube. Do not use
pliers, nipper pliers, scissors, etc. This may result in
flattening and an inability to join, or the tube falling out and
air leakage.
b The outer diameter of polyurethane tubing will expand when
internal pressure is applied, and so you may not be able to
reattach One-touch fittings. Check the tubing outer diameter
of all tubing other than for the release bushing, and reattach
the One-touch fittings without dividing the tubing if the outer
diameter precision is more than ±0.15 mm. When
reattaching the One-touch fittings, check whether the tubing
can smoothly pass through the release bushing.
c Grasp the tubing, slowly push it straight (0 to 5°) into the
One-touch fitting until it comes to a stop.
d Once pushed all the way in, gently pull the tubing back, and
check that it hasn't come all the way out. If not firmly
inserted all the way in, it may result in air leakage and the
tube falling out.
Series
Caution
e If the union nut is loose, tighten it by hand temporarily. Then,
fix the body with the tightening tool, and tighten the union
nut with an appropriate wrench, applying the torque shown
below.
Appropriate tightening
Fitting size
rotations
VCK
06
1.5 to 2.0
VCK
08
1.5 to 2.0
VCK
10
1.5 to 2.0
VCK
12
1.5 to 2.0
2) Detaching of the tubing
a Push in the release button sufficiently, pushing the collar
evenly.
b Pull the tube out while pressing so that the release button is
not returned. If the release button is not pressed sufficiently,
gripping will instead increase and it will become harder to
pull out.
c Before reusing the detached tube, first cut off the portion of
tubing that had been gripped. Using the portion of tubing
that had been gripped will lead to air leakage and the tube
will become harder to detach.
3. Joining a metal rod accessory
After joining a metal rod accessory (KC series, etc.) to a One-
touch fitting, do not use a tube, resin plug, reducer, etc, as it
may result in the tube falling out.
4. When attaching a tube, resin plug, metal rod, etc.,
do not attach while pressing on the release
bushing.
5. When using another brand tubing, check whether
the tubing material and outer diameter precision
meet the following specifications.
1) Nylon tubing
2) Soft nylon tubing
3) Polyurethane tubing
If tubing outer diameter tolerance is not met, do not use if
tubing inner diameter differs from our brand.
This may result in inability to join, leakage, the tube falling out,
and damage to the fitting.
Lubrication
Caution
1. Do not lubricate the valve.
The valve uses white vaseline as lubricant.
6
Piping
Equivalent tightening torque
N·m
3 to 8
4 to 9
6 to 9
9 to 12
within ±0.1 mm
within ±0.1 mm
within ±0.15 mm, -0.2 mm
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