Datasheet

Selection
Warning
4. Ambient environment
Use within the operable ambient temperature range. Check the
compatibility between the product’s composition materials and
the ambient atmosphere. Be certain that the fluid used does
not touch the external surface of the product.
5. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids
can cause static electricity.
Piping
Warning
Caution
1. During use, deterioration of the tube or damage to
the fittings could cause tubes to come loose from
their fittings and thrash about.
To prevent uncontrolled tube movement, install protective
covers or fasten tubes securely in place.
2. For piping the tube, fix the product securely using
the mounting holes so that the product is not in the
air.
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.
Install piping so that it does not apply pulling, pressing, bending
or other forces on the valve body.
2. Avoid connecting ground lines to piping, as this may
cause electric corrosion of the system.
<Water>
The use of a fluid that contains foreign objects can cause
problems such as malfunction and seal failure by promoting
wear of the valve seat and armature, and by sticking to the
sliding parts of the armature etc. Install a suitable filter
(strainer) immediately upstream from the valve. As a general
rule, use 80 to 100 mesh.
The supply water includes materials that create a hard
sediment or sludge such as calcium and magnesium.
Sediment and sludge can cause the valve to not operate
properly. Therefore, install a water softening device, which
removes these materials, and a filter (strainer) directly in front
of the valve.
<Oil>
Generally, FKM is used as seal material, as it is resistant to
oil. The resistance of the seal material may deteriorate
depending on the type of oil, manufacturer or additives.
Check the resistance before using.
Series VXD
Specific Product Precautions 2
Be sure to read before handling.
Refer to back cover for Safety Instructions, “Handling Precautions for SMC Products”
(M-E03-3) and the Operation Manual for 2 Port Solenoid Valves for Fluid Control
Precautions. Please download it via our website, http://www.smcworld.com
AC/Class B built-in full-wave rectifier coil: 10% or less of rated voltage
DC coil: 2% or less of rated voltage
Caution
1. Leakage voltage
Particularly when using a resistor in parallel with a switching
element and using a C-R element (surge voltage suppressor)
to protect the switching element, take note that leakage
current will flow through the resistor, C-R element, etc.,
creating a possible danger that the valve may not turn off.
2. Selecting model
Material depends on fluid. Select optimal models for the fluid.
3. When the fluid is oil.
The kinematic viscosity must not exceed 50 mm
2
/s.
R
SOL.
OFF
Switching element
C
Leakage current
Power supply
Leakage voltage
Mounting
Warning
1. If air leakage increases or equipment does not
operate properly, stop operation.
After mounting is completed, confirm that it has been done
correctly by performing a suitable function test.
2. Do not apply external force to the coil section.
When tightening is performed, apply a wrench or other tool to
the outside of the piping connection parts.
3. Mount a valve with its coil position upward, not
downward.
When mounting a valve with its coil positioned downward,
foreign objects in the fluid will adhere to the iron core leading
to a malfunction. Especially for strict leakage control, such as
with vacuum applications and non-leak specifications, the coil
must be positioned upward.
4. Do not warm the coil assembly with a heat insulator
etc.
Use tape, heaters, etc., for freeze prevention on the piping and
body only. They can cause the coil to burn out.
5. Secure with brackets, except in the case of steel
piping and copper fittings.
6. Avoid sources of vibration, or adjust the arm from
the body to the minimum length so that resonance
will not occur.
7. Painting and coating
Warnings or specifications printed or labelled on the product
should not be erased, removed or covered up.
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