Datasheet

1. Confirm the specifications.
Give careful consideration to operating conditions such as the
application, fluid and environment, and use within the operating
ranges specified in this catalog.
2. Fluid temperature
Operate within the prescribed fluid temperature range.
3. Fluid quality
For water
The use of fluid which contains foreign matter can cause
problems such as malfunction and seal failure by promoting
wear of the valve seat and core, and by sticking to the sliding
parts of the armature, etc. Install a suitable filter (strainer)
immediately upstream from the valve. As a general rule, use 80
to 100 mesh.
For air
Use general purpose compressed air (except dry air) and
provide a filter of 40µm or less in the upstream piping.
2. Low temperature operation
1. The valve can be used at ambient temperatures as low as
–10°C, but take measures to prevent freezing or
solidification of impurities, etc.
2. When used in cold areas with water, etc., adopt freeze
prevention measures such as draining the water from
pipelines after pump operation has been stopped. If
warmed with a heater, etc., avoid the coil unit. Also,
implement warming or other freeze prevention measures
for the body.
OFF
CR
1. Cannot be used as an emergency shutoff
valve, etc.
The valves presented in this catalog are not designed for safe-
ty applications such as an emergency shutoff valve. If the
valves are used in this type of system, other reliable safety as-
surance measures should also be adopted.
2. Extended periods of continuous energization
Consult SMC if valves will be continuously energized for ex-
tended periods of time.
3. Liquid seals
In cases with a flowing liquid, provide a by-pass valve in the
system to prevent the liquid from entering the liquid seal circuit.
4. This solenoid valve cannot be used for ex-
plosion protection.
5. Maintenance space
The installation should allow sufficient space for maintenance
activities (removal of valve, etc.).
Warning
Precautions on Design Selection
Warning
Caution
1. Leakage voltage
Particularly when using a resistor in parallel with a switching
element and using a C-R element (surge voltage suppressor)
to protect the switching element, take note that leakage current
will flow through the resistor and C-R element, etc., creating a
danger that the valve may not shut OFF.
Switching element
Leakage voltage
Valve
Leakage current
Power supply
10% or less of rated voltage
AC coil
2% or less of rated voltage
DC coil
Series VDW
2/3 Port Solenoid Valve for Fluid Control/Precautions 1
Be sure to read before handling.
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