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VT317
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-OMH0002-A
Design
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Selection
1. Confirm the specifications
The products presented 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
compressed air (including vacuum).
Any damage attributed to the use beyond the
specifications is not guaranteed.
2. Actuator drive
When an actuator, such as a cylinder, is to be driven using
a valve, take appropriate measures to prevent potential
danger caused by actuator operation.
3. Holding of pressure (including vacuum)
Since valves are subject to air leakage, they cannot be
used for applications such as holding pressure (including
vacuum) in a pressure vessel.
4. Cannot be used as an emergency shutoff valve,
etc.
The valves presented in this manual are not designed for
safety applications such as an emergency shutoff valve. If
the valves are used in this type of system, other reliable
safety assurance measures should also be adopted.
5. Vacuum applications
When the valve is used for switching vacuum, take
measures such as the installation of a suction filter to
prevent suction of external dust or other contaminants
from the suction pad or exhaust port.
Also, it is necessary to continuously exhaust during
vacuum suction. Otherwise, external dust or other
contaminants entering into the suction pad or air leakage
can result, which causes dropping of a work piece.
6. Vacuum
When the valve is used for switching vacuum, take
measures to prevent suction of external dust or other
contaminants from the suction pad or exhaust port.
7. About ventilation
When using the valve in closed control panel, etc., install a
ventilating opening, etc. in order not to increase the
pressure inside a control panel by ventilating air and not to
pack the heat generated by valve.
8.Extended periods of continuous energization
If the valve is energized for extended periods of time, the
temperature rise due to the heat generated by the coil
assembly can deteriorate the performance or life of the
valve and have adverse effects on peripheral equipment
near the valve. If the total energizing time per day is
expected to be longer than the total de-energizing time per
day, use a DC specification valve.
When the valve is mounted in a control panel or energized
for an extended periods of time, employ measures to
radiate excess heat so that temperatures remain within
the specified range.
In particular, if three or more adjacent stations on the
manifold are energized together for extended periods of
time, special care should be given to a larger temperature
rise.
10. Disassembly and modification prohibited
Do not modify or reconstruct (including additional
machining) the product. An injury or failure can result.
1. Leakage voltage
When C-R device (Surge voltage suppressor) is used for
the protection of switching device, note that voltage
leakage will be increased by passing voltage leakage
through C-R device.
Suppressor residual voltage leakage should be as follows.
DC coil: 2% or less of rated voltage
AC coil:20% or less of rated voltage
VT317 Series
3 Port Solenoid Valve / Precautions
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Be sure to read before handling.
Warning
Caution
