SMC Networks SYJ3000 Series Operation Manual page 9

Air Supply
Caution
1. When low dew point 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.
Consider using products compatible with
low dew points such as those from the
25A- series.
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 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 excessive carbon powder is seen, 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 SMC Best
Pneumatics catalog.
Operating Environment
Warning
1. Do not use in an atmosphere having corrosive gases,
chemicals, sea water, water, water steam, or where
there is direct contact with any of these .
2. Products with IP65 enclosures (based on IEC60529)
are protected against dust and water, however, these
products cannot be used in water.
3. Products compliant to IP65 satisfy the specifications
through mounting. Be sure to read the Precautions for
each product.
4. Do not use in an environment where flammable gas or
explosive gas exists.
explosion. The products do not have an explosion
proof construction.
5. Do not use in a place subject to heavy vibration and/or
shock.
6. The valve should not be exposed to prolonged sunlight.
Use a protective cover.
7. Remove any sources of excessive heat.
8. If it used in an environment where there is possible
contact with oil, weld spatter, etc., exercise preventive
measures.
9. When the solenoid valve is mounted in a control panel
SYJ Series
Precautions for 5 Port Solenoid Valve ⑤
Be sure to read before handling. Refer to main text for detailed precautions on every series.
Usage may cause a fire or
or its energized for a long time, make sure ambient
temperatures is within the specification of the valve.
Maintenance
Warning
1. Perform maintenance inspection according
to the procedures indicated in the operation
manual.
If handled improperly, malfunction and damage of
machinery or equipment may occur.
2. Removal of equipment, and supply/exhaust
of compressed air
Before components are removed, first confirm that
measures are in place to prevent workpieces from
dropping, run-away equipment, etc. Then, cut off the
supply air and electric power, and exhaust all air
pressure from the system using the residual pressure
release function. For the 3-position closed center or
double check valve types, exhaust the residual
pressure between the valve and the cylinder. When
the equipment is operated after remounting or
replacement, first confirm that measures are in place
to prevent the lurching of actuators, etc. Then, confirm
that the equipment is operating normally. In particular,
when a 2-position double solenoid valve is used,
releasing residual pressure rapidly may cause the
spool valve to malfunction, depending on the piping
conditions, or the connected actuator to operate.
3. Low frequency operation
Valves should be operated at least once every 30
days to prevent malfunction. (Use caution regarding
the air supply.)
4. Manual override operation
When the manual override is operated, connected
equipment will be actuated.
Operate after safety is confirmed.
Maintenance
Caution
1. Drain flushing
Remove drainage from the air filters regularly.
2. Lubrication
In the case of rubber seals, once lubrication has been
started, it must be continued. Use class 1 (no
additives) and class 2 (with additives) ISO VG32
turbine oil. For details about lubricant manufacturers'
brands, refer to the SMC website. If other lubricant oil
is used, it may cause a malfunction.
3. Manual override operation
When switching a double solenoid valve via the
manual override operation, instantaneous operation
may cause the malfunction of the cylinder. It is
recommended that the manual override be held until
the cylinder reaches the stroke end position.
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