Applicable fluids
VX21/22/23, 2 Port solenoid valves
Standard
Water (standard, up to 60°C), air (standard, dry),
turbine oil, spindle oil, Kerosene, vacuum (up to 1
torr), carbon dioxide (CO
2
), nitrogen gas (n
2
),
Freon 11, 113, 114
Fluid
Option symbol
Steam
(S,Q)
Vacuum (up to 10
-3
torr)
(V,M)
Option
Non-leak (10
-5
atm cc/sec or less)
(V,M)
High temperature water
(X,E,N,P)
High temperature oil
(D,N)
Others
VVX21/22/23 Manifold series
Generally, the recommended viscosity of fluid is 50 cSt max. Fluids
contaminated with foreign material can promote wear of the valve
seat and iron core. To prevent this, place a filter/strainer immediately
before the valve. A mesh of 80-100 micron is recommended.
SMC valves are designed for use without lubricant. However, correctly
lubricated air will increase the life of the valve.
CAUTION
These valves are NOT EXPLOSION PROOF. When using inflammable oil
or gas, ensure that there is no leakage either inside or outside of the
valve.
Fluid temperature
Refer to the temperature range for each model. The temperature range
changes according to the sealing material, coil insulation, power
supply, etc.
Ambient conditions
Freezing. When using water in cold environments anti-freeze precau-
tions should be taken. These include but are not limited to, draining of
pumps and valves. When using a heater, avoid applying it to the coil.
Freezing will result when the dew point of the medium is high and the
ambient temperature is low or when a large volume of fluid flows
within the valve. In such cases install a dryer, keep the valve body
warm, or take other preventative measures.
Long period energisation or de-energisation
The valve energisation period depends on the type and viscosity of the
fluid. When pure water is the medium, then the valve should be
switched at least every 10 days. If the period is longer than 10 days, a
system check mechanism should be implemented.
CAUTION
These valves are not intended for use as emergency system valves.
Vibration
These valves should not be subjected to more than 3G and in the case
of non-leak type no more than 1G.
Fig 7
n-
1/
8
•
1/
4
(OUT Port)
H
(Pitch)
F
F
E
T
W
D
(44)
34.5
DIN connector
Terminal
Conduit
Grommet
Blanking plate
When you enquire about the product, please contact the following
SMC Corporation
:
ENGLAND
Phone 01908-563888
TURKEY
Phone 212-2211512
ITALY
Phone 02-92711
GERMANY
Phone 6103-402-0
HOLLAND
Phone 020-5318888
FRANCE
Phone 01-64-76-10-00
SWITZERLAND
Phone 052-34-0022
SWEDEN
Phone 08-603 07 00
SPAIN
Phone 945-184100
AUSTRIA
Phone 02262-62-280
Phone 902-255255
IRELAND
Phone 01-4501822
GREECE
Phone 01-3426076
DENMARK
Phone 8738-0800
FINLAND
Phone 09-68 10 21
NORWAY
Phone 67-12 90 20
BELGIUM
Phone 03-3551464
POLAND
Phone 48-22-6131847