SMC Networks VQC4000, Operation Manual

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No.VQC4000V-OMX0001
Operating Environment
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 and IP67 enclosures (based on
IEC60529) are protected against dust and water.
However, these products cannot be used in 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 flammable
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 vibration
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 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.
Maintenance
1. Perform maintenance inspection
according 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 3-position closed center type, exhaust the
residual pressure between the valve and the actuator.
When the equipment is operated after remounting or
replacement, first confirm that measures are in place
to prevent 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.
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.
Warning Warning
Caution
Caution
VQC4000 Series
Precautions for 5 Port Solenoid Valve 5
Be sure to read before handling. Refer to main text for detailed precautions on every series.