Datasheet

Series VXZ
Specific Product Precautions 2
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
Selection
Warning
<Water>
The use of a fluid that contains foreign objects can cause
problems 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
100 mesh.
The supply water includes materials that create a hard
sediment or sludge such as calcium and magnesium. 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.
Tap water pressure:
The water pressure for tap water is normally 0.4 MPa or less.
However, in places like a high-rise building, the pressure may
be 1.0 MPa. When selecting tap water, be careful of the
maximum operating pressure differential.
When using water or heated water, poor operation or leaks
may be caused by dezincification, erosion, corrosion, etc.
The brass (C37) body of this product uses dezincification
resistant material as a standard. We also offer a stainless steel
body type with improved corrosion resistance. Please use the
one that fits your needs.
<Oil>
Generally, FKM is used as seal material, as it is resistant to oil.
The resistance of the seal material may deteriorate depending
on the type of oil, manufacturer or additives.
Check the resistance before using.
<Vacuum>
Please be aware that there is a range of pressure that can be
used.
Vacuum piping direction: if the system uses a vacuum pump,
we ask that you install the vacuum pump on the secondary
side.
Also, install a filter on the primary side, and be careful that no
foreign object is picked up.
Please replace the valve after operating the device
approximately 300,000 times.
Air pressure
Hydraulic pressure
Low
vacuum
Medium
vacuum
High
vacuum
Ultra high
vacuum
Extreme
high
vacuum
10
-12
10
-11
10
-10
10
-9
10
-8
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
11010
2
10
-12
10
-11
10
-10
10
-9
10
-8
10
-7
10
-6
10
-5
10
-4
10
-3
10
-2
10
-1
110
1
10
2
10
3
10
4
10
5
10
6
10
7
10
8
10
9
Pa
Torr
(mmHg)
<Suction filtration, Vacuum bottle set, Suction cup>
Drying
Discharge/Plasma Neon tube/Fluorescent light
<Accelerator, Electron microscope>
Mounting
4. Ambient environment
Use within the operable ambient temperature range. Check the
compatibility between the product’ s composition materials and
the ambient atmosphere. Be certain that the fluid used does
not touch the external surface of the product.
5. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids
can cause static electricity.
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, C-R element, etc.,
creating a possible danger that the valve may not turn off.
2. Selecting model
Material depends on fluid. Select optimal models for the fluid.
3. When the fluid is oil.
The kinematic viscosity must not exceed 50 mm
2
/s.
1. If air leakage increases or equipment does not
operate properly, stop operation.
After mounting is completed, confirm that it has been done
correctly by performing a suitable function test.
2. Do not apply external force to the coil section.
When tightening is performed, apply a wrench or other tool to
the outside of the piping connection parts.
3. Mount a valve with its coil position upward, not
downward.
When mounting a valve with its coil positioned downward,
foreign objects in the fluid will adhere to the iron core leading
to a malfunction.
4. Do not warm the coil assembly with a heat insulator etc.
Use tape, heaters, etc., for freeze prevention on the piping and
body only. They can cause the coil to burn out.
5. Secure with brackets, except in the case of steel
piping and copper fittings.
AC/Class B built-in full-wave rectifier coil: 10% or less of rated voltage
DC coil: 2% or less of rated voltage
R
SOL.
OFF
Switching element
C
Leakage current
Leakage
voltage
Power
supply
Warning
Atmospheric pressureAtmospheric pressure
Differential
pressure
Differential
pressure
Vapor
deposition
Surface
physics
Charged
particle beam
36