Datasheet

Selection
Warning
Design
Design
1. Cannot be used as an emergency shutoff valve etc.
The valves presented in this catalogue are not designed for
safety applications such as an emergency shutoff valve. If the
valves are used in this type of system, other reliable safety
assurance measures should also be adopted.
2. Extended periods of continuous energization
The solenoid coil will generate heat when continuously
energized. Avoid using in a tightly shut container. Install it in a
well-ventilated area. Furthermore, do not touch it while it is
being energized or right after it is energized.
3. Liquid rings
In cases with a flowing liquid, provide a bypass valve in the
system to prevent the liquid from entering the liquid seal circuit.
4. Actuator drive
When an actuator, such as a cylinder, is to be driven using a
valve, take appropriate measures to prevent potential danger
caused by actuator operation.
5. Pressure (including vacuum) holding
It is not usable for an application such as holding the pressure
(including vacuum) inside of a pressure vessel because air
leakage is entailed in a valve.
6. When the conduit type is used as equivalent to an
IP65 enclosure, install a wiring conduit etc.
7. When an impact, such as water hammer etc., caused
by the rapid pressure fluctuation is applied, the
solenoid valve may be damaged. Give an attention to
it.
2. Fluid
1) Type of fluid
Select an appropriate valve with reference to the table below
for the general fluid. Before using a fluid, check whether it is
compatible with the materials of each model by referring to
the fluids listed in this catalogue. Use a fluid with a kinematic
viscosity of 50 mm
2
/s or less.
If there is something you do not know, please contact SMC.
2) Flammable oil, Gas
Check the specifications for leakage in the interior and/or
exterior area.
3) Corrosive gas
Cannot be used since it will lead to cracks by stress corrosion
or result in other incidents.
4) Depending on water quality, a brass body can cause
corrosion and internal leakage may occur. If such abnormali-
ties occur, exchange the product for a stainless steel body.
5) Use an oil-free specification when any oily particle must not
enter the passage.
6) Applicable fluid on the list may not be used depending on the
operating condition. Give adequate confirmation, and then
determine a model, just because the compatibility list shows
the general case.
3. Fluid quality
<Air>
1) Use clean air.
Do not use compressed air that contains chemicals, synthetic
oils including organic solvents, salt or corrosive gases, etc.,
as it can cause damage or malfunction.
2) Install an air filter.
Install an air filter close to the valve on the upstream side. A
filtration degree of 5 μm or less should be selected.
3) Install an aftercooler or air dryer, etc.
Compressed air that contains excessive drainage may cause
malfunction of valves and other pneumatic equipment. To
prevent this, install an aftercooler or air dryer, etc.
4) If excessive carbon powder is generated, eliminate it by
installing a mist separator on the upstream side of
valves.
If excessive carbon powder is generated by the compressor,
it may adhere to the inside of the valves and cause a
malfunction.
Applicable fluid
For Air
For Water
For Oil
For Heated water
For High temperature oil
Air
Air/Water
Air/Water/Oil
Air(up to 99°C)/Water/Heated water
Air(up to 99°C)/Water/High temperature oil
Series VXD
Specific Product Precautions 1
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
Selection
Warning
1. Minimum operating pressure differential
Be aware that even if the pressure difference is above the
minimum operating pressure differential when the valve is
closed, the pressure difference may fall below the minimum
operating pressure differential when the valve opens,
depending on the capacity of the supply source (pumps,
compressors, etc.,) or the type of pipe restrictions (the
piping is bent continuously due to elbow or tee, or narrow
tube nozzle is installed in the end). If the product is used
below the minimum operating pressure, the operation
becomes unstable, which might cause valve opening or
closing failure, or oscillation, leading to failure due to
insufficient pressure differential. Select an appropriate
valve size with reference to the flow-rate characteristics
and flow-rate characteristics table (on pages 34 through to
40).
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