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VFR6000 Series
5 Port Solenoid Valve / Precautions 1
Be sure to read before handling.
Design / Selection
Warning
1. Confirm the specifications
Products represented in this manual are designed only for
use in compressed air systems (including vacuum).
Do not operate at pressures or temperatures, etc., beyond
the range of specifications, as this can cause damage or
malfunction. (Refer to the specifications.)
Please contact SMC when using a fluid other than com-
pressed air (including vacuum).
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. Intermediate stops
For 3 position closed center or double check valve style, it
is difficult to make a piston stop at the required position
accurately and precisely due to the compressibility of air.
Furthermore,
since valves
guaranteed for zero air leakage, it may not be possible to
hold a stopped position for an extended period of time.
Please contact SMC if it is necessary to hold a stopped
position for an extended period of time.
4. 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.
5. Not suitable for use as an emergency shutoff
valve, etc.
The valves listed in this manual are not designed for
safety applications such as an emergency shutoff valve. If
the valves are used for the mentioned applications,
additional safety measures should be adopted.
6. Release of residual pressure
For maintenance purposes install a system for releasing
residual pressure. Especially in the case of 3-position
closed center valve or double check valve type, ensure
that the residual pressure between the valve and the
cylinder is released.
7. Double solenoid type
When using the double solenoid type for the first time,
actuators
may
travel
in
depending on the switching position of the valve.
Implement measures to prevent any danger from
occurring when operating the actuator.
- - 4 - -
and cylinders
are
not
an
unexpected
direction
- 4 -
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.
9. Extended periods of continuous energization
• If a valve will be continuously energized for extended
period of time, the temperature of the valve will increase
due to the heat generated by the coil. This will likely
adversely affect the performance of the solenoid valve
and any nearby peripheral equipment. Therefore, when
it is continuously energized or the energized period per
day is longer than the de-energized period use a DC
specification valve.
• For applications such as mounting a valve on a control
panel, incorporate measure to limit the heat radiation so
that it is within the operating temperature range. For
example, the temperature will be high when a 3 station
manifold or larger is put next to other valves and
continuously energized.
10. Do not disassemble the product or make any
modifications, including additional machining.
It may cause human injury and/or an accident.
Caution
1. Momentary energization
If a double solenoid valve is operated with momentary
energization, it should be energized for at least 0.1
second. However, depending on the condition of the
secondary load, it should be energized until the cylinder
reaches the stroke end position, since there is a
possibility of malfunction.
VFR6000-OMA0001-B
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