Maintenance - SMC Networks SV Series Manual

3/4/5-Port Solenoid Valves
Precautions 7
Be sure to read this before handling products.
Operating Environment
Warning
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. Products with IP65 and IP67 enclosures (based on
IEC60529) are protected against dust and water.
However, these products cannot be used in water.
3. Products compliant with IP65 and IP67 satisfy the
product specifications when mounted properly.
Be sure to read the precautions for each product.
4. Do not use in an environment where flam-
mable gas or explosive gas exists. Usage may
cause a fire or explosion. The products do not
have an explosion proof construction.
5. Do not use in a place subject to heavy vibra-
tion and/or shock.
6. The valve should not be exposed to prolonged
sunlight. Use a protective cover. Note that the
valve is not for outdoor use.
7. Remove any sources of excessive heat.
8. If it is 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 con-
trol panel or it's energized for a long period of
time, make sure the ambient temperature is
within the specifications of the valve.
Caution
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.
9

Maintenance

Warning
1. Perform maintenance and inspection ac-
cording to the procedures indicated in the
operation manual.
If handled improperly, human injury and/or malfunction or
damage of machinery and 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 replace-
ment, 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
When a manual override is operated, connected equipment
will be actuated.
Operate only after safety is confirmed.
5. If the volume of air leakage increases or the
valve does not operate normally, do not use
the valve.
Perform periodic maintenance on the valve to
confirm the operating condition and check for
any air leakage.
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 turbine oil (with no additives), VG32. If other
lubricant oil is used, it may cause a malfunction. Please
contact SMC for information on the suggested class 2 turbine
oil (with additives), VG32.
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.