SMC Networks VGA342R Series Operation Manual page 5

Design/Selection
Warning
1. Confirm the specifications.
Products represented in this catalog are designed only for use
in compressed air systems (including vacuum). Do not
operate at pressures, temperatures, etc., beyond the range of
specifications, as this can cause damage or malfunction.
(Refer to the specifications.)
We do not guarantee against any damage if the product is
used outside of the specification range.
2. Actuator drive
When an actuator, such as a cylinder, is to be driven using a
valve, take appropriate measures (cover installation or
approach prohibition) to prevent potential danger caused by
actuator operation.
3. Holding Pressure (including Vacuum)
Since the valves are subject to air leakage, they cannot be
used for applications such as holding pressure (including
vacuum) in a pressure vessel.
4. Not suitable for use as an emergency shutoff
valve, etc.
The valves listed in this catalog are not designed for safety
applications such as an emergency shutoff valve. If the valves
are used in such applications, additional safety measures
should be adopted.
5. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure.
6. Operation in a vacuum condition
When a valve is used for switching a vacuum, take measures
to install a suction filter or similar to prevent external dust or
other foreign matter from entering inside the valve. In addition,
at the time of vacuum adsorption, be sure to vacuum at all
times.
Failure to do so may result in foreign matter sticking to the
adsorption pad, or air leakage causing the workpiece to drop.
7. Regarding a vacuum switch valve and a
vacuum release valve
If a non-vacuum valve is installed in the middle of piping
system having a vacuum, the vacuum condition will not be
maintained. Use a valve designed for use under vacuum
conditions.
8. Ventilation
Provide ventilation when using a valve in a confined area,
such as in a closed control panel. For example, install a
ventilation opening, etc., in order to prevent pressure from
increasing inside of the confined area and to release the heat
generated by the valve.
VGA342R Series
3-port air operated valve / Precautions (1)
Make sure to read this before handling.
9. Do not disassemble the product or make any
modifications, including additional machining.
Doing so may cause human injury and/or an accident.
10. Resumption after a long period of holding
time
When resuming operation after a long period of holding time,
there are cases in which, regardless of whether the product is
in an ON or OFF state, there is a delay in the initial response
time due to adhesion. Conducting several cycles of running-in
operation will solve this problem. Please consider
implementing this before resumption.
Caution
1.
Operation in low temperature conditions
It is possible to operate a valve in extreme temperatures,
as low as –10°C. Take appropriate measures to avoid the
freezing of drainage, moisture, etc., in low temperatures.
2. Operation for air blowing
When using a solenoid valve for air blowing, use an external
pilot type.
Additionally, when compressed air within the pressure range of
the established specifications is supplied to the external pilot
type valve's port.
3. Mounting orientation
Mounting orientation is free.
4. Initial lubrication of main valve
The following initial lubricant has already been applied to the
main valve.
5. For the pilot EXH (PE) port
If the solenoid valve and the manifold's pilot EXH (PE) port is
restricted extremely or blocked, abnormal operation of the
solenoid valve may occur.
Warning
1. Operation Manual
Install the products and operate them only after reading the
operation manual carefully and understanding its contents.
Also, keep the manual where it can be referred to as
necessary.
2. Ensure sufficient space for maintenance ac-
tivities
When installing the products, allow access for maintenance.
3. Tighten threads with the proper tightening
torque.
When installing the products, follow the listed torque
specifications.
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Installation
No.VG300-OMH0006-B