SMC Networks VGA342R Series Operation Manual page 6

Installation
Warning
4. If air leakage increases or equipment does not
operate properly, stop operation.
Check mounting conditions when air and power supplies are
connected. Initial function and leakage tests should be
performed after installation.
5. Painting and coating
Warnings or specifications printed on or affixed to the product
should not be erased, removed, or covered up.
Also, applying paint to resinous parts may have an adverse
effect due to the solvent in the paint.
Piping
Caution
1.Refer to the Fittings and Tubing Precautions for
handling one-touch fittings.
2.Preparation before piping
Before piping is connected, it should be thoroughly blown out
with air (flushing) or washed to remove chips, cutting oil, and
other debris from inside the pipe.
3. Wrapping of pipe tape
When screwing piping or fittings into ports, ensure that chips
from the pipe threads or sealing material do not enter the
piping.
Also, if pipe tape is used, leave 1 thread ridges exposed at the
end of the threads.
4. Connection of piping and fittings
When screwing piping or fittings into the valve, tighten them
as follows.
Rc
For the tightening torque, refer to the table below.
Tightening Torque for piping
Thread Proper tightening torque (Nm)
Rc1/8
Rc1/2
Rc3/4
Rc1
VGA342R Series
3-port air operated valve / Precautions (2)
Make sure to read this before handling.
3 to 5
20 to 25
28 to 30
36 to 38
5. Piping to products
When piping to a product, refer to the operation manual to
avoid mistakes regarding the supply port, etc.
Warning
Lubrication
1. The valve has been lubricated for life by the manufacturer and
therefore do not require lubrication while in service.
2. If a lubricant is used in the system, 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. Once lubricant is utilized within the system, since the
original lubricant applied within the product during
manufacturing will be washed away, please continue to supply
lubrication to the system. Without continued lubrication,
malfunctions could occur. If turbine oil is used, refer to the
Safety Data Sheet (SDS) of the oil.
3. 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.
Warning
(1) Type of fluids
Be sure to use compressed air for the fluid.
(2) When there is a large amount of drainage
Compressed air containing a large amount of drainage can
cause 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 and allow the condensation to enter the
compressed air lines. It causes 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 SMC Best Pneumatics
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.
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Lubrication
Air Supply
No.VG300-OMH0006-B