Datasheet

Series VXZ
Specific Product Precautions 1
Be sure to read before handling. Refer to back cover for Safety Instructions, “Handling
Precautions for SMC Products” (M-E03-3) and the Operation Manual for 2 Port Solenoid Valves
for Fluid Control Precautions. Please download it via our website, http://www.smcworld.com
Design
Warning
Selection
Warning
Selection
Warning
Applicable Fluid
For Air
For Water
For Oil
For Heated water
For High temperature oil
Air
Air, Water
Air, Water, Oil
Air(up to 99
°C ), Water, Heated water
Air(up to 99°C), Water, Oil, High temperature oil
1. Usage with low flow
Unstable flow may occur with the product under the
FOLLOWING CONDITIONS s LOW FLOW FROM THE PUMP OR
COMPRESSOR ETC s USE OF SEVERAL ELBOWS OR TEES IN THE
CIRCUITOR s THINNOZZLESINSTALLEDAT THEENDOFTHE PIPING
etc. This can cause valve opening/closing failure, or
oscillation, and cause a valve malfunction.
Please check the pressure differential and flow to select
THEAPPROPRIATESIZEOFTHEVALVEREFERRINGTOTHE&LOWRATE
Characteristics on page 34. Ensure that pressure
differential does not become lower than 0.01 MPa during
ON (N.C.: Valve open).
1. Cannot be used as an emergency shutoff valve etc.
The valves presented in this catalogue 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.
%XTENDEDPERIODSOFCONTINUOUSENERGIZATION
The solenoid coil will generate heat when continuously
energized. Avoid using in a tightly shut container. Install it in a
well ventilated area. Furthermore, do not touch it while it is
being energized or right after it is energized.
3. 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.
4. 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.
5. 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
leakage is entailed in a valve.
6. When the conduit type is used as equivalent to an
IP65 enclosure, install a wiring conduit etc.
7. When an impact, such as water hammer etc.,
caused by the rapid pressure fluctuation is applied,
the solenoid valve may be damaged. Give an
attention to it.
2. Fluid
1) Type of fluid
Select an appropriate valve with reference to the table below
for the general fluid. Before using a fluid, check whether it is
compatible with the materials of 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) Flammable oil, Gas
"Confirm the specification for leakage in the interior and/or
exterior area."
3) Corrosive gas
Cannot be used since it will lead to cracks by stress
corrosion or result in other incidents.
4) When a brass body is used, then depending on water
quality, corrosion and internal leakage may occur. If such
abnormalities occur, exchange the product for a stainless
steel body.
5) Use an oil-free specification when any oily particle must not
enter the passage.
6) Applicable fluid on the list may not be used depending on
the operating condition. Give adequate confirmation, and
then determine a model, just because the compatibility list
shows the general case.
3. Air quality
<Air>
1) Use clean air.
Do not use compressed air that contains chemicals,
synthetic oils including organic solvents, salt or corrosive
gases, etc., as it can cause damage or malfunction.
2) Install an air filter.
Install air filters close to valves at their upstream side.
filtration degree of 5 μm or less should be selected.
3) Install an aftercooler or air dryer, etc.
Compressed air that contains excessive drainage may
cause malfunction of valves and other pneumatic equipment.
To prevent this, install an aftercooler or air dryer, etc.
4) If excessive carbon powder is generated, eliminate it
by installing mist separators at the upstream side of
valves.
If excessive carbon powder is generated by the compressor,
it may adhere to the inside of the valves and cause a
malfunction.
35