Installation and Maintenance Manual
VX21/22/23, 2 Port Solenoid Valves and
VVX21/22/23, Manifold Series
This manual should be read in conjunction with the current catalogue
For future reference, please keep this manual in a safe place
Safety Instructions
These safety instructions are intended to prevent a hazardous situa-
tion and/or equipment damage.These instructions indicate the level
of potential hazard by label of “Caution”, “Warning” or “Danger”.
To ensure safety, be sure to observe ISO4414
(Note1)
, JIS B 8370
(Note2)
and other safety practices.
Note 1: ISO 4414: Pneumatic fluid power – Recommendations for the
application of equipment to transmission and control systems.
Note 2: JIS B 8370: Pneumatic system axiom.
CAUTION :
Operator error could result in injury or
equipment damage.
WARNING:
Operator error could result in serious
injury or loss of life.
DANGER :
In extreme conditions, there is a
possible result of serious injury or loss of life.
WARNING
1. The compatibility of pneumatic equipment is the respon-
sibility of the person who designs the pneumatic system
or decides its specifications.
Since the products specified here are used in various operating
conditions, their compatibility for the specific pneumatic system
must be based on specifications or after analysis and/or tests to
meet your specific requirements.
2. Only trained personnel should operate pneumatically
operated machinery and equipment.
Compressed air can be dangerous if an operator is unfamiliar
with it. Assembly, handling or repair of pneumatic systems should
be performed by trained and experienced operators.
3. Do not service machinery/equipment or attempt to
remove component until safety is confirmed.
1) Inspection and maintenance of machinery/equipment should
only be performed after confirmation of safe locked-out
control positions.
2) When equipment is to be removed, confirm the safety process
as mentioned above. Switch off air and electrical supplies and
exhaust all residual compressed air in the system.
3) Before machinery/equipment is re-started, ensure all safety
measures to prevent sudden movement of cylinders etc.
(Bleed air into the system gradually to create back-pressure,
i.e. incorporate a soft-start valve).
4. Contact SMC if the product is to be used in any of the
following conditions:
1) Conditions and environments beyond the given specifica-
tions, or if product is used outdoors.
2) Installations in conjunction with atomic energy, railway, air
navigation, vehicles, medical equipment, food and beverage,
recreation equipment, emergency stop circuits, press
applications, or safety equipment.
3) An application which has the possibility of having negative
effects on people, property, or animals, requiring special
safety analysis.
CAUTION
Ensure that the air supply system is filtered to 5 micron.
Type/Valve specifications (Energised open type)
Flow rate
Max. operating pressure
Max
Orifice
differential MPa (kgf/cm
2
)
system Proof Weight
Port
size
Effective
Model
pressure pressure
(g)
size
(mmø)
Cv
area Water
Air
Oil
Steam
MPa
MPa
(Note)
(mm
2
)
(kgf/cm
2
) (kgf/cm
2
)
AC
DC
AC
DC
AC
DC
AC
1/
8
2
0.17
3
VX2110-01
2.0{20}
1.5{15}
2.0{20}
1.5{15}
1.5{15}
1.5{15}
1.0{10}
(6A)
3
0.33
6
VX2120-01
0.9{9}
0.5{5}
1.1{11}
0.6{6}
0.5{5}
0.5{5}
1.0{10}
4.5
0.61
11
VX2130-01
0.4{4}
0.2{2}
0.45{4.5}
0.2{2}
0.2{2}
0.15{1.5}
0.45{4.5}
260
2
0.17
3
VX2110-02
2.0{20}
1.5{15}
2.0{20}
1.5{15}
1.5{15}
1.5{15}
1.0{10}
Water
VX2120-02
0.9{9}
0.5{5}
1.1{11}
0.6{6}
0.5{5}
0.5{5}
1.0{10}
Oil
3
0.33
6
VX2220-02
1.7{17}
1.5{15}
2.0{20}
1.5{15}
1.2{12}
1.2{12}
1.0{10}
Air
5.0
400
VX2320-02
2.5{25}
3.0{30}
3.0{30}
3.0{30}
1.7{17}
2.0{20}
-
3.0
{50}
540
VX2130-02
0.4{4}
0.2{2}
0.45{4.5}
0.2{2}
0.2{2}
0.15{1.5}
0.45{4.5}
{30}
260
1/
4
4.5
0.61
11
VX2230-02
0.6{6}
0.35{3.5} 0.75{7.5} 0.35{3.5} 0.35{3.5}
0.3{3}
0.75{7.5}
Steam
400
(8A)
VX2330-02
0.85{8.5}
0.9{9}
1.0{10}
0.9{9}
0.55{5.5}
0.85{8.5}
1.0{10}
1.0
540
6
1.05
19
VX2240-02
0.35{3.5} 0.15{1.5}
0.4{4}
0.15{1.5}
0.2{2}
0.1{1}
0.4{4}
{10}
400
VX2340-02
0.55{5.5}
0.3{3}
0.5{5}
0.35{3.5} 0.35{3.5}
0.3{3}
0.5{5}
540
8
1.7
31
VX2250-02
0.13{1.3} 0.08{0.8} 0.15{1.5} 0.08{0.8}
0.1{1}
0.08{0.8}
0.15{1.5}
Water·
510
VX2350-02
0.17{1.7}
0.2{2}
0.2{2}
0.2{2}
0.14{1.4}
0.2{2}
0.2{2}
Oil Air
3.0
650
10
1.9
34
VX2260-02
0.08{0.8} 0.03{0.3} 0.08{0.8} 0.03{0.3} 0.05{0.5}
0.03{0.3}
0.08{0.8}
1.0 {10}
{30}
510
VX2360-02
0.1{1}
0.07{0.7}
0.1{1}
0.07{0.7} 0.08{0.8}
0.07{0.7}
0.1{1}
Steam 0.5 {5}
650
3
0.33
6
VX2220-03
1.7{17}
1.5{15}
2.0{20}
1.5{15}
1.2{12}
1.2{12}
1.0{10}
Water
400
VX2320-03
2.5{25}
3.0{30}
3.0{30}
3.0{30}
1.7{17}
2.0{20}
-
Oil Air
540
4.5
0.61
11
VX2230-03
0.6{6}
0.35{3.5} 0.75{7.5} 0.35{3.5} 0.35{3.5}
0.3{3}
0.75{7.5}
3.0 {30}
5.0
400
VX2330-03
0.85{8.5}
0.9{9}
1.0{10}
0.9{9}
0.55{5.5}
0.85{8.5}
1.0{10}
Steam
{50}
540
3/
8
6
1.05
19
VX2240-03
0.35{3.5} 0.15{1.5}
0.4{4}
0.15{1.5}
0.2{2}
0.1{1}
0.4{4}
1.0 {10}
400
(10A)
VX2340-03
0.55{5.5}
0.3{3}
0.5{5}
0.35{3.5} 0.35{3.5}
0.3{3}
0.5{5}
540
8
1.7
31
VX2250-03
0.13{1.3} 0.08{0.8} 0.15{1.5} 0.08{0.8}
0.1{1}
0.08{0.8}
0.15{1.5}
510
VX2350-03
0.17{1.7}
0.2{2}
0.2{2}
0.2{2}
0.14{1.4}
0.2{2}
0.2{2}
Water·
650
10
2.4
43
VX2260-03
0.08{0.8} 0.03{0.3} 0.08{0.8} 0.03{0.3} 0.05{0.5}
0.03{0.3}
0.08{0.8}
Oil Air
3.0
510
VX2360-03
0.1{1}
0.07{0.7}
0.1{1}
0.07{0.7} 0.08{0.8}
0.07{0.7}
0.1{1}
1.0 {10}
{30}
650
1/
2
10
2.4
43
VX2260-04
0.08{0.8} 0.03{0.3} 0.08{0.8} 0.03{0.3} 0.05{0.5}
0.03{0.3}
0.08{0.8}
Steam
590
(15A)
VX2360-04
0.1{1}
0.07{0.7}
0.1{1}
0.07{0.7} 0.08{0.8}
0.07{0.7}
0.1{1}
0.5 {5}
730
Note: It is a grommet valve. Add the conduit 10g, the DIN connector 30g and the terminal 60g respectively.
Energised open type (N.C.) (Fig 3)
Manifold Series VVX21/22/23
Manifold specifications
Manifold type
B Mount
Manifold base type
Common pressure type,
individual pressure type (Note)
Number of valves
2~10 stations
Blanking plate
VVX21···VX011-011,
(with O-rings, screws)
VVX22/23···VX011-006
Note: Common port is placed on vacuum side.
Electrical connection (Fig 5)
CAUTION
Isolate both power and air supplies before removing/replacing
connector.
In the case of DIN connector and terminal block, connections are
shown below.
1. Loosen the top screw and remove the connector housing from the
terminal spades on the solenoid.
2. Remove the housing screw and insert a screwdriver into the slot
on the underside of the DIN cap and carefully remove the block.
3. Loosen the terminal screws on the block and insert the stripped
leads. Secure each lead by re-tightening the appropriate terminal
screw.
4. Tighten the housing grommet nut to secure the cable.
CAUTION
Pull connector out vertically, never at an angle.
In the case of the conduit entry, the connections are shown below.
Wiring
Should the coil be subjected to a surge voltage, place a surge sup-
presser in parallel with the coil if not fitted as an option.
The allowable voltage range is -10% - +10% of rated voltage.
The voltage found across the coil when de-energised is :-
AC: 20% or less of rated voltage
DC: 2% or less of rated voltage
Piping
1 Piping should be thoroughly flushed to remove sludge, cutting oil
and dust.
2 During piping and coupling connection, care should be taken to
prevent contamination by dirty threads or sealing materials.
When applying sealing tape to threads, the thread should extend
one screw pitch beyond the tape.
3 Pay attention to the direction of piping (solenoid valve IN, OUT.)
In the case of 2 port valves,
indicates the inlet side. In the
case of 3 port valves,
indicates inlet,
indicates outlet,
indicates exhaust.
4 The coil should not be subjected to an external force. When tight-
ening, apply a wrench to the outside of the pipe mounting area
only.
5 In the case of solenoid valves specified for vacuum and non-leak
use, please pay special attention to the exclusion of foreign mat-
ter and leakage through the couplings.
6 In the process of piping, if the coil assembly needs to be removed,
do so by removing its retainer.
After completion of piping please reattach the retainer.
7 The piping system should not be grounded.
Grounding would cause electrolytic corrosion.
8 To prevent collection of fluid within the piping circuit please install
a relief valve within the circuit.
Mounting (Fig 7)
1 The solenoid valve may be mounted in any orientation. However
when mounted upside down, foreign material in the fluid is liable
to adhere to the iron core. This mounting position is not recom-
mended by SMC.
2 Do not keep coil assemblies warm with insulating materials etc. It
will cause the coil to burn out.
Anti-freezing tape, heater etc. should be applied to piping and
body areas only.
3 Except in the case of steel pipes and couplings, mount the valve
with a bracket, especially in the case of non-leak and vacuum
valves. The bracket will help prevent loosening of the couplings.
4 Do not place the valve in areas of severe vibration.
In the case of manifold mounted type valves (where 00 connection
option appears in the part number), see Fig 7.
Ensure that 'O' rings item 5 in Fig 8 are not damaged and free from
any foreign bodies. Locate valve on manifold, being sure to connect
the OUT port on the manifold with the centre port on the valve. Locate
the 4 off mounting screws and tighten so as to achieve an air tight
seal between the valve and the manifold.
049A/ENG
Installation
WARNING
Ensure all air and power supplies are ISOLATED before commencing
installation.
Do not install these valves in explosive atmospheres.
If these valves are exposed to water or oil droplets ensure that they
are protected.
If it is intended to energise a valve for an extended period please con-
sult SMC.
If air leakage causes associated equipment to malfunction cease using
valve and inspect for cause.
Check fixings while pressure and power are applied. Initial function
and leakage tests should be performed after installation.
Install only once safety instructions have been read and understood.
OUT
Symbol
IN
Fig 1
Fig 4
Fig 8
Fig 2
Fig 3
Fig 5
Fig 6
Energise to open type (N.C.) (Fig 1)
Energise to close type (N.O.) (Fig 2)
Type/Valve specifications (Energised close type)
Flow rate
Max. operating pressure
Max
Orifice
differential MPa (kgf/cm
2
)
system Proof Weight
Port
size
Effective Model
pressure pressure
(g)
size
(mmø) Cv
area Water
Air
Oil
Steam
MPa
MPa
(Note)
(mm
2
)
(kgf/cm
2
) (kgf/cm
2
)
1/
8
2
0.17
3
VX2112-01
0.9{9}
1.5{15}
0.8{8}
1.0{10}
(6A)
3
0.33
6
VX2122-01
0.45{4.5}
0.7{7}
0.45{4.5}
0.7{7}
4.5
0.61
11
VX2132-01
0.2{2}
0.3{3}
0.2{2}
0.3{3}
280
2
0.17
3
VX2112-02
0.9{9}
1.5{15}
0.8{8}
1.0{10}
VX2122-02
0.45{4.5}
0.7{7}
0.45{4.5}
0.7{7}
3
0.33
6
VX2222-02
0.8{8}
1.0{10}
0.7{7}
1.0{10}
440
1/
4
VX2322-02
1.2{12}
1.6{16}
1.0{10}
-
580
(8A)
VX2132-02
0.2{2}
0.3{3}
0.2{2}
0.3{3}
Water 280
4.5
0.61
11
VX2232-02
0.3{3}
0.45{4.5}
0.3{3}
0.45{4.5}
Oil
5.0{50}
440
VX2332-02
0.6{6}
0.8{8}
0.6{6}
0.8{8}
Air
580
6
1.05
19
VX2242-02
0.15{1.5}
0.25{2.5}
0.15{1.5}
0.25{2.5}
3.0
440
VX2342-02
0.35{3.5}
0.45{4.5}
0.35{3.5}
0.45{4.5}
{30}
580
3
0.33
6
VX2222-03
0.8{8}
1.0{10}
0.7{7}
1.0{10}
Steam 440
VX2322-03
1.2{12}
1.6{16}
1.0{10}
-
1.0{10}
580
3/
8
4.5
0.61
11
VX2232-03
0.3{3}
0.45{4.5}
0.3{3}
0.45{4.5}
440
(10A)
VX2332-03
0.6{6}
0.8{8}
0.6{6}
0.8{8}
580
6
1.05
19
VX2242-03
0.15{1.5}
0.25{2.5}
0.15{1.5}
0.25{2.5}
440
VX2342-03
0.35{3.5}
0.45{4.5}
0.35{3.5}
0.45{4.5}
580
Note: It is a grommet value. Add the conduit 10g, the DIN connector 30g and the terminal 60g respectively.
OUT
Symbol
IN
Symbol
Common pressure type
Individual pressure type
Port A
Port A
Port A
Port P
OUT
OUT
OUT
OUT
IN
IN
IN
IN
Port P
Port P
Construction and parts (Fig 4)
7
7
2
4
5
2
4
5
3
3
6
6
8
9
1
1
IN
IN
OUT
P
2
P
1
OUT
VX21/22/23 (Orifice size 2,3,4,5,6mmø)
VX22/23 (Orifice size 8,10mmø)
No.
Description
Material
Standard
Option
1
Body
Brass
SUS304
2
Core assembly
SUS430·Copper
SUS430·Silver
3
Armature assembly
SUS430·NBR
SUS430·FPM/SUS430·PTFE/SUS430·EPR
4
Return spring
SUS304
-
5
Coil assembly
Class B molded
Class H molded
6
O-ring
NBR
FPM/EPR/PTFE
7
Retainer
SUS304
-
8
Bonnet
Brass
SUS304
9
O-ring
NBR
FPM/EPR/PTFE
1:+
2:-
Terminal No.
1
2
DIN connector
+
-
With DIN connector
mark
mark
Conduit terminal
Phillips/ordinary
round head screw
M3
Phillips/ordinary
round head screw
M3
View A-A'
(Internal connection)
IN
P
A
R
No.
Description
Material
Standard
Option
1
Body
Aluminum
-
2
Core assembly
SUS430·Copper
SUS430·Silver
3
Base
Aluminum
-
4
Armature assembly
SUS430·NBR
SUS430·FPM/SUS430·EPR
5
O-ring
NBR
FPM/EPR
6
Coil assembly
Class B molded
Class H molded
7
Return spring
SUS304
-
Common pressure type
Individual pressure type
OUT
Port A
OUT
Port A
IN
Port P
IN
Port P
2
2
7
4
6
5
5
1
5
3
7
4
6
5
1
5
5
3
VX21/22/23
