Air Supply; Operating Environment - SMC Networks VQC1000 Series Operation Manual

VQC1000/2000 Series
Precautions for 5 Port Solenoid Valve ④
Be sure to read before handling.
[Metal seal]
1) These valves can be used without lubrication.
2) If a lubricant is used in the system, use class 1 turbine oil (no
additives), ISO VG32. For details about lubricant manufacturers'
brands, refer to the SMC website. Additionally, please contact
SMC for details about class 2 turbine oil (with additives) ISO
VG32.
Lubrication amount
2.
If the lubrication amount is excessive, the oil may accumulate
inside the pilot valve, causing malfunction or response delay.
So, do not apply a large amount of oil. When a large amount of oil
needs to be applied, use an external pilot type to put the supply
air on the pilot valve side in the non-lube state. This prevents the
accumulation of oil inside the pilot valve.

Air Supply

Warning
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 No.
6 catalog.
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.
Caution
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 No.
6 catalog.

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 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.
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.
Maintenance
Warning
1. Perform maintenance and 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 the 3-position closed center, 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.
- 7 -
No.VQC1000V-OMM0002-B