Datasheet

3 Port Solenoid Valve for Fluid Control/Precautions 1
Be sure to read this before handling.
For detailed precautions on each series, refer to the main text.
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1. Cannot be used as an emergency shutoff val-
ve, etc.
The valves presented in this catalogue are not designed for sa-
fety applications such as an emergency shutoff valve. If the val
-
ves are used in this type of system, other reliable safety assu
-
rance measures should also be adopted.
2. Extended periods of continuous energisation
The solenoid coil will generate heat when continuously energi-
sed. Avoid using in a tightly shut container. Install it in a well-
ventilated area. Furthermore, do not touch it while it is being
energised or right after it is energised.
3. This solenoid valve cannot be used for explo-
sion proof applications.
4. Maintenance space
The installation should allow sufficient space for maintenance
activities (removal of valve, etc.).
5. Liquid rings
In cases with a flowing liquid, provide a bypass valve in the
system to prevent the liquid from entering the liquid seal circuit.
6. 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.
7. Pressure (including vacuum) holding
It is not usable for an application such as holding the pressure
(including vacuum) inside of a pressure vessel because air lea
-
kage is entailed in a valve.
8. When the conduit type is used as equivalent
to an IP65 enclosure, install a wiring conduit,
etc.
9. When an impact, such as water hammer, etc.,
caused by the rapid pressure fluctuation is
applied, the solenoid valve may be damaged.
Please pay attention to this.
Design
Warning
1. Confirm the specifications.
Give careful consideration to the operating conditions such as
the application, fluid and environment, and use within the opera-
ting ranges specified in this catalogue.
2. Fluid
1)
Type of fluid
Before using a fluid, confirm whether it is compatible with the
materials from each model by referring to the fluids listed in
this catalogue. Use a fluid with a kinematic viscosity of 50
mm
2
/s or less. If there is something you do not know, please
contact SMC.
2) Inflammable oil, Gas,
Confirm the specification for leakage in the interior and/or ex
-
terior area.
Warning
Selection
3) Corrosive gas
Cannot be used since it will lead to cracks by stress corrosion
or result in other incidents.
4) Use an oil-free specification when oil particles must not enter
the fluid passage.
5) Applicable fluid on the list may not be used depending on the
operating condition. Just because the compatibility list shows
the general case, still give adequate confirmation when selec
-
ting a model.
3. Fluid quality
The use of a fluid which contains foreign matter can cause pro-
blems such as malfunction and seal failure by promoting wear of
the valve seat and armature, 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.
When used to supply water to boilers, substances such as
calcium and magnesium which generate hard scale and sludge
are included. Since this scale and sludge can cause the valve to
malfunction, install water softening equipment, and a filter
(strainer) directly upstream from the valve to remove these
substances.
4. Air quality
1)
Use clean air.
Do not use compressed air which includes chemicals, synthe
-
tic oils containing organic solvents, salt or corrosive gases,
etc., as it can cause damage or malfunction.
2) Install air filters.
Install air filters close to the valves on their upstream side. A
filtration degree of
5µm or less should be selected.
3) Install an air dryer or after cooler, etc.
Compressed air that includes excessive drainage may cause
malfunction of valves and other pneumatic equipment. To
prevent this, install an air dryer or after cooler, etc.
4)
If excessive carbon powder is generated, eliminate it by ins-
talling mist separators on the upstream side of the valves.
If excessive carbon powder is generated by the compressor,
it may adhere to the inside of the valves and cause a mal
-
function.
Refer to SMC’s Best Pneumatics catalogue for further details on
compressed air quality.
5. Ambient environment
Use within the operable ambient temperature range. Confirm
the compatibility between the product’s composition materials
and the ambient atmosphere. Be sure that the fluid used does
not touch the external surface of the product.
6. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids can
cause static electricity.
7. For the low particle generation specification,
please contact SMC.
Warning
Selection