VT325 Series
3 Port Solenoid Valve
Precautions 3
Be sure to read this before handling products.
Lubrication
1. Lubrication
The valve has been lubricated for life by the factory and does
not require any further lubrication.
If a lubricant is used in the system, use class 1 turbine oil (no
additives), ISO VG32.
Once lubricant is utilized within the system, since the original
lubricant applied within the product during manufacturing will
be washed away, please continue to supply lubrication to the
system. Without continued lubrication, malfunctions could
occur.
If turbine oil is used, refer to the Safety Data Sheet (SDS) of
the oil.
2. Lubrication amount
If too much oil is applied, it mayaccumulate in the product,
causing malfunction or response delay. So, do not apply a
large amount of oil.
Air Supply
1. Type of fluids
Please consult with SMC when using the product in
applications other than compressed air.
2. When there is a large amount of drainage
Compressed air containing a large amount of drainage can
cause the malfunction of pneumatic equipment. An air dryer or
water separator should be installed upstream from filters.
3. Drain flushing
If condensation in the drain bowl is not emptied on a regular
basis, the bowl will overflow. This may cause the malfunction
of pneumatic equipment. If the drain bowl is difficult to check
and remove, the installation of a drain bowl with an auto drain
option is recommended.
For compressed air quality, refer to the SMC Best Pneumatics
catalog No. 6.
4. Use clean air
Do not use compressed air that contains chemicals, synthetic
oils that include organic solvents, salt, corrosive gases, etc.,
as it can cause damage or malfunction.
1. When extremely dry air is used as the fluid,
degradation of the lubrication properties
inside the equipment may occur, resulting in
reduced reliability (or reduced service life) of
the equipment. Please consult with SMC.
2. Install an air filter.
Install an air filter upstream near the valve. Select an air filter
with a filtration size of 5 μm or smaller.
3. Take measures to ensure air quality, such as
by installing an aftercooler, air dryer, or water
separator.
Compressed air that contains a large amount of drainage can
cause the malfunction of pneumatic equipment, such as
valves. Therefore, take appropriate measures to ensure air
quality, such as by providing an aftercooler, air dryer, or water
separator.
4. If an excessive amount of carbon powder is
present, install a mist separator on the
upstream side of the valve.
If excessive carbon dust is generated by the compressor, it
may adhere to the inside of a valve and cause it to
malfunction.
For compressed air quality, refer to the SMC Best Pneumatics
catalog No. 6.
Operating Environment
1. Do not use in an atmosphere containing
corrosive gases, chemicals, sea water, water,
water steam, or where there is direct contact
with any of these.
2. Do not use in an environment where
flammable gas or explosive gas exists. Usage
may cause a fire or explosion. The products
do not have an explosion proof construction.
3. Do not use in a place subject to heavy
vibration and/or shock.
4. The valve should not be exposed to prolonged
sunlight. Use a protective cover. Note that the
valve is not for outdoor use.
5. Remove any sources of excessive heat.
6. If it is used in an environment where there is
possible contact with oil, weld spatter, etc.,
exercise preventive measures.
7. When the solenoid valve is mounted in a
control panel or it’s energized for a long
period of time, make sure the ambient
temperature is within the specifications of the
valve.
1. Temperature of ambient environment
Use the valve within the range of the ambient temperature
specification of each valve. In addition, pay attention when
using the valve in environments where the temperature
changes drastically.
2. Humidity of ambient environment
• When using the valve in environments with low humidity,
take measures to prevent static.
• If the humidity rises, take measures to prevent the adhesion
of water droplets on the valve.
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No.VT325
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-OMK0002-B
