User Manual

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7. Mounting
Before connecting the valve, flush the piping of the upstream (supply pressure port side) and
downstream (control equipment port side) to eliminate particles in the piping and foreign matter
and scales generated during piping.
8. Environment
Please contact SMC if the product is used where corrosive gas, chemicals and their solutions,
water vapor, or seawater droplets exist, or temperature exceeds 50
o
C, or vibration occurs.
9. Lubricant oil
The product has been lubricated for life by the manufacturer, and does not require lubrication in
service.
10. Air Source
① Install an air filter of 5μm to the upstream of the solenoid valve (air source side). Install the
filter as close to the valve as possible. Air resistance is large and the flow decreases when the
filter element is clogged. Clean the filter element.
② Carbon powder and oil depleting materials generated from the air supply (mainly from the
compressor) can cause an increase in friction on the spool causing it to stick. This may result in
the valve falling to operate. If the supply pressure is pressurized for a long time with low quality
air, then carbon powder or oil depleting materials contained in the compressed air might
accumulate in the space between the spool and sleeve, which may cause the spool to stick. In
this situation, the type of the compressor lubricating oil should be replaced with a good quality
compressor lubrication oil that generates less oxidants. It is possible to prevent fine foreign
matter from entering the valve by mounting a mist separator with high filtration accuracy (AM
series) after a normal filter (AF series). If the product is used for extended period of time where
a large amount of oil depleting materials exist, the cartridge element will be clogged and
pressure drop becomes large. When the differential pressure reaches 0.1MPa or more, or the
product is used more than a year, replace the cartridge element. Replace the element at least
within 3 years of use.
③ If the product is used with the filter case fully accumulated with drain, it may enter into the
downstream, causing operation failure of the valve. Discharge drain regularly. Cycle time for
drain discharge is different depending on the weather and air consumption. The piping should
be slightly sloped so that generated drain is pooled in one place with the drain cock for
discharge to the outside. The slope for the piping should be 1:100.
Refer to "SMC Air Preparation System" for further details on air source. For details of filter,
mist separator and regulator, refer to the operation manual for each parts.
AF series for the filter, AM series for the mist separator, and AR series for the regulator.