VX21_22_23US
Direct Operated 2 Port Solenoid Valve New
RoHS
Air
Oil
Medium Water
vacuum
Steam
Can be used with
heated water.
Large flow rate
Compact
Lightweight
Flow rate
Height
10% Smaller
Weight
20% More flow
(Size 1)
(Size 1)
Comparison with SMC conventional
model
Conventional model
(Size 1, Aluminum body)
New VX
Body
material
Enclosure
Air
Aluminum, Resin
Water/Oil/
Medium vacuum/Steam
C37 (Brass),
Stainless steel
IP65
Electrical entry
"Faston" type
terminal is IP40.
68 mm
61 mm
With one-touch fittings
(Resin body)
30% Lighter
Power
consumption
4.5 W
7W
10.5 W
(Size 1)
(Size 2)
(Size 3)
(DC/N.C. valve)
Bracket
Standard
equipment
Air
Medium
vacuum
Manifold
Material • Body/PPS
• Base/Aluminum
• Seal/NBR, FKM
Solenoid coil type
• Insulation type Class B/H
• Fluid temperature
Class B/Max. 60 C
Class H/Max. 183 C
Class B
Series VX21/22/23
Valve type
N.C.
N.O.
Class H
CAT.ES70-44B
Direct Operated 2 Port Solenoid Valve
Air
Medium Water
vacuum
Oil
Enclosure
IP65
Steam
Can be used with
heated water.
Clearance
By providing a bumper and clearance,
we reduced the collision sound of the
core when ON (when the valve is
open). Because of the clearance, when
using highly viscous fluids such as oil,
the armature does not get stuck and
the responsiveness when OFF (when
the valve is closed) is improved.
Flame resistance
UL94V-0 conformed
Power consumption
DC/Class B, N.C. valve
4.5 W (Size 1)
7 W (Size 2)
10.5 W (Size 3)
Low-noise
construction
Metal noise reduced
by the rubber bumper
Improved armature
durability
Body material
Piping variations
Thread piping, One-touch fitting
Air Aluminum, Resin
Water/
Oil/
C37 (Brass),
Medium Stainless steel
vacuum/
Steam
Full-wave rectifier type (AC specification: Insulation type Class B/H)
Improved durability
Improved OFF response
Reduced buzz noise
Low-noise construction
Specially constructed to improve the OFF response
when operated with a higher viscosity fluid such as oil.
Service life is extended by the special construction.
(compared with current shading coil)
Rectified to DC by the full-wave rectifier, resulting in a
buzz noise reduction.
Reduced apparent power
7 VA (Size 1)
12 VA (Size 3)
10 VA
32 VA
Size
20 VA
Specially constructed to reduce the metal noise
during operation.
Class B, N.C. valve
9.5 VA (Size 2)
Orifice diameter
2 mmø
3 mmø
Size 1
4 mmø
5 mmø
—
Size 2
—
—
Size 3
—
—
8 mmø
10 mmø Note)
—
—
—
1/8, 1/4
One-touch fitting: ø6, ø8
—
—
1/4, 3/8
One-touch fitting: ø8, ø10
—
—
Port size
7 mmø
—
1/4, 3/8, 1/2
One-touch fitting: ø10, ø12
Note) N.C. only
Features 1
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ..... 8
How to Order (Solenoid Valve for Manifold, Manifold Base),
Blanking Plate Assembly Part No., How to Order Manifold Assembly (Example) ... 9
For Medium Vacuum
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 10
How to Order (Single Unit) .................................................... 11
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 12
How to Order (Solenoid Valve for Manifold, Manifold Base),
Blanking Plate Assembly Part No., How to Order Manifold Assembly (Example) ... 13
For Water
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 14
How to Order (Single Unit) .................................................... 15
For Oil
For Air
For Medium
Vacuum
How to Order (Single Unit) ...................................................... 7
For Water
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 5, 6
For Oil
For Air
For Steam
Single Unit/Manifold: Specifications........................................ 2
Common Specifications ................................................................ 3
Selection Steps ................................................................................. 4
Specifications
Series VX21/22/23
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 16
For Steam
Can be used with heated water.
Model/Valve Specifications, Fluid and Ambient Temperature, Valve Leakage ... 18
How to Order (Single Unit) .................................................... 19
Other Special Options................................................................. 20
Construction
Single Unit.....................................................................................21
Manifold..........................................................................................22
Dimensions (Single Unit) Body material: Aluminum ......... 23
Body material: Resin .................. 24
Body material: C37, Stainless steel .. 26
(Manifold) Base material: Aluminum ........... 29
Replacement Parts ........................................................................30
Glossary of Terms .........................................................................31
Solenoid Valve Flow-rate Characteristics .......................... 32
Flow-rate Characteristics ...........................................................37
Specific Product Precautions ...................................................39
1
Construction
How to Order (Single Unit) .................................................... 17
Dimensions
INDEX
Direct Operated 2 Port Solenoid Valve
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Air, Medium Vacuum, Water, Oil and Steam
Single Unit (For Air, Medium Vacuum, Water, Oil and Steam)
Valve type
Electrical entry
Normally Closed (N.C.)
Normally Open (N.O.)
Grommet
Conduit
DIN terminal
Conduit terminal
Faston terminal
Solenoid coil type
Insulation type: Class B, Class H
Rated voltage
100 V/200 V/110 V/230 VAC
(220 V/240 V/48 V/24 VAC)
24 V/12 VDC
Normally Closed (N.C.)
Size 1
Size
Voltage in ( ) indicates special voltage.
Material
Orifice
diameter
Body — Aluminum, Resin, C37 (Brass), Stainless steel
Seal — NBR, FKM
Refer to individual pages for details of each fluid.
Normally Open (N.O.)
2 mmø
3 mmø
4 mmø
5 mmø
7 mmø
8 mmø
10 mmø
Port size
Size 2
—
—
—
Size 3
—
—
—
—
—
—
—
—
—
—
1/8, 1/4
ø6, ø8
1/4, 3/8
ø8, ø10
1/4, 3/8, 1/2
ø10, ø12
Size 1
Size 2
—
—
Size 3
—
—
—
N.C. only
Manifold (For Air, Medium Vacuum)
Valve type
Electrical entry
Normally Closed (N.C.)
Normally Open (N.O.)
Grommet
Conduit
DIN terminal
Conduit terminal
Faston terminal
Manifold type
Common SUP type
Individual SUP type
Manifold
Solenoid coil type
Insulation type: Class B
Size
Rated voltage
100 V/200 V/110 V/230 VAC
(220 V/240 V/48 V/24 VAC)
24 V/12 VDC
Material
Body — Resin
Base — Aluminum
Seal — NBR, FKM
2
Port size
Voltage in ( ) indicates special voltage.
2 mmø
3 mmø
Orifice
4 mmø
diameter
5 mmø
7 mmø
IN
Common SUP type
(Air)
OUT
IN
Individual SUP type
(Medium vacuum) OUT
—
—
—
3/8
1/8, 1/4
1/8, 1/4
3/8
Series VX21/22/23
Specifications
Common Specifications
Standard Specifications
Valve construction
Withstand pressure
Body material
Aluminum, Resin, C37 (Brass), Stainless steel
Seal material Note 3)
Dust-tight, Water-jet-proof type (IP65) Note 1)
Location without corrosive or explosive gases
DC
24 VDC, (12 VDC) Note 2)
AC
10% or less of rated voltage
DC
2% or less of rated voltage
Allowable voltage fluctuation
Allowable leakage
voltage
10% of rated voltage
Coil insulation type
For Medium
Vacuum
Coil
specifications
100 VAC, 200 VAC, 110 VAC, 230 VAC, (220 VAC, 240 VAC, 48 VAC, 24 VAC) Note 2)
Class B, Class H
For Water
Note 1) Electrical entry “Faston” type terminal is IP40.
Note 2) Voltage in ( ) indicates special voltage. (Refer to page 20.)
Note 3) For seal material/EPDM, please contact SMC.
Be sure to read “Specific Product Precautions” before handling.
Solenoid Coil Specifications
Normally Closed (N.C.)
Normally Open (N.O.)
DC Specification
DC Specification
Size
Size 1
Power consumption (W) Note 1) Temperature rise (°C)Note 2)
4.5
50
Size
Size 1
Power consumption (W) Note 1) Temperature rise ( C)Note 2)
7.5
60
Size 2
7
55
Size 2
8.5
70
Size 3
10.5
65
Size 3
12.5
70
Note 1) Power consumption, Apparent power: The value at ambient
temperature of 20 C and when the rated voltage is applied.
(Variation: 10%)
Note 2) The value at ambient temperature of 20 C and when the rated
voltage is applied. The value depends on the ambient environment. This is for reference.
Note 1) Power consumption, Apparent power: The value at ambient
temperature of 20 C and when the rated voltage is applied.
(Variation: 10%)
Note 2) The value at ambient temperature of 20 C and when the rated
voltage is applied. The value depends on the ambient environment. This is for reference.
AC Specification (Built-in Full-wave Rectifier Type)
AC Specification (Built-in Full-wave Rectifier Type)
Class B
Class B
Apparent power (VA) Note 1) 2) Temperature rise ( C)Note 3)
Size
Apparent power (VA) Note 1) 2) Temperature rise ( C)Note 3)
7
60
Size 1
9
60
Size 2
9.5
70
Size 2
10
70
70
Size 3
14
70
Size 3
12
Class H
Dimensions
Size
Size 1
Class H
Size
Apparent power (VA) Note 1) 2) Temperature rise ( C)Note 3)
Size
Apparent power (VA) Note 1) 2) Temperature rise ( C)Note 3)
Size 1
9
100
Size 1
9
100
Size 2
12
100
Size 2
12
100
Size 3
15
100
Size 3
15
100
Note 1) Power consumption, Apparent power: The value at ambient
temperature of 20 C and when the rated voltage is applied.
(Variation: 10%)
Note 2) There is no difference in the frequency and the inrush and
energized apparent power, since a rectifying circuit is used in the
AC.
Note 3) The value at ambient temperature of 20 C and when the rated
voltage is applied. The value depends on the ambient environment. This is for reference.
For Oil
Rated voltage
AC
For Steam
Environment
For Air
NBR, FKM
Enclosure
Construction
Valve
specifications
Direct operated poppet
2.0 MPa (Resin body type 1.5 MPa)
Note 1) Power consumption, Apparent power: The value at ambient
temperature of 20 C and when the rated voltage is applied.
(Variation: 10%)
Note 2) There is no difference in the frequency and the inrush and
energized apparent power, since a rectifying circuit is used in the
AC.
Note 3) The value at ambient temperature of 20 C and when the rated
voltage is applied. The value depends on the ambient environment. This is for reference.
3
Series VX21/22/23
Selection Steps
Selection Steps
Step 1 Select the fluid.
Item
Select the fluid.
Selection item
Page
Symbol
Air
Page 5, 6
0
Water
Page 14
2
Oil
Page 16
3
Medium
vacuum
Steam
Page 10
4
Page 18
5
Can be used with heated water.
q
VX2 3 0 A A
q
Step 2 Select “Body material”, “Port size” and “Orifice diameter” from “Flow rate — Pressure” of each fluid.
Item
Select from “Flow
rate — Pressure.”
Body material
Port size
Orifice diameter
Selection item
Size
Symbol
Size 3
3
w
A
e
Body material Aluminum
Port size
1/8
Orifice diameter
2
e
VX2 3 0 A A
w
Step 3 Select electrical specification.
Item
Select electrical
specification.
Selection item
Voltage
Symbol
24 VDC
Electrical entry Grommet
Step 4 For other special options, refer to page 20.
4
A
r
VX2 3 0 A A
r
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
Specifications
For Air Single Unit
Model/Valve Specifications
For Air
N.C.
Refer to “Glossary of Terms” on page 31 for passage symbols.
AIuminum Body Type
Port size
1
1/8, 1/4
2
1/4, 3/8
3
1/4, 3/8
Orifice diameter
(mmø)
Model
2
3
5
4
7
5
8
10
10
1/2
Flow-rate characteristics
C
[dm3/(s·bar)]
0.63
1.05
2.20
1.90
3.99
1.96
5.67
5.74
8.42
VX210
VX220
VX230
b
Cv
0.63
0.68
0.39
0.52
0.44
0.55
0.33
0.64
0.39
0.23
0.41
0.62
0.62
1.08
0.75
1.58
2.21
2.21
Maximum operating
pressure differential
(MPa)
1.0
0.6
0.2
1.0
0.15
1.0
0.3
0.1
0.1
Weight
(g)
Note)
220
220
220
340
340
450
450
450
470
For Oil
Size
Resin Body Type (Built-in One-touch Fittings)
Orifice diameter
(mmø)
ø6
1
ø8
ø8
2
ø10
ø10
3
ø12
Model
2
3
5
2
3
5
4
7
4
7
5
8
10
5
8
10
VX210
VX220
VX230
Flow-rate characteristics
C
[dm3/(s·bar)]
0.82
1.25
1.45
0.82
1.81
2.11
1.69
3.14
1.68
3.54
2.50
2.77
5.69
2.50
2.56
5.69
b
Cv
0.44
0.34
0.43
0.44
0.40
0.32
0.40
0.34
0.49
0.36
0.44
0.82
0.46
0.44
0.88
0.64
0.23
0.35
0.40
0.23
0.41
0.56
0.47
0.84
0.50
0.90
0.70
1.22
1.54
0.70
1.38
1.76
Maximum operating
pressure differential
(MPa)
1.0
0.6
0.2
1.0
0.6
0.2
1.0
0.15
1.0
0.15
1.0
0.3
0.1
1.0
0.3
0.1
Weight
(g)
Note)
220
220
220
220
220
220
340
340
340
340
460
460
460
460
460
460
Construction
Port size
Dimensions
Size
Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.
Refer to “Glossary of Terms” on page 31 for details on the maximum operating pressure differential.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
10 Note) to 60
Ambient temperature ( C)
20 to 60
Note) Dew point temperature: 10 C or less
Seal material Note2)
NBR (FKM)
Leakage rate (Air) Note1)
1 cm3/min or less (AIuminum body type)
15 cm3/min or less (Resin body type)
External Leakage
Seal material Note2)
NBR (FKM)
For Water
2
For Steam
1
For Medium
Vacuum
Passage symbol
Leakage rate (Air) Note1)
1 cm3/min or less (AIuminum body type)
15 cm3/min or less (Resin body type)
Note 1) Leakage is the value at ambient temperature 20 C.
Note 2) For seal material/FKM, refer to “Other options” on page 20 for the
selection.
5
Series VX21/22/23
For Air Single Unit
Model/Valve Specifications
N.O.
Passage symbol
1
2
Refer to “Glossary of Terms” on page 31 for passage symbols.
AIuminum Body Type
Size
Port size
1
1/8, 1/4
2
1/4, 3/8
3
1/4, 3/8
Orifice diameter
(mmø)
Model
2
3
5
4
7
5
8
Flow-rate characteristics
C
[dm3/(s·bar)]
0.63
1.05
2.20
1.90
3.99
1.96
5.67
VX240
VX250
VX260
b
Cv
0.63
0.68
0.39
0.52
0.44
0.55
0.33
0.23
0.41
0.62
0.62
1.08
0.75
1.58
Maximum operating
pressure differential
(MPa)
0.9
0.45
0.2
0.8
0.15
0.8
0.3
Note)
Weight
(g)
240
240
240
370
370
490
490
Resin Body Type (Built-in One-touch Fittings)
Size
Port size
Orifice diameter
(mmø)
ø6
1
ø8
ø8
2
ø10
ø10
3
ø12
Model
2
3
5
2
3
5
4
7
4
7
5
8
5
8
VX240
VX250
VX260
Flow-rate characteristics
C
[dm3/(s·bar)]
0.82
1.25
1.45
0.82
1.81
2.11
1.69
3.14
1.68
3.54
2.50
2.77
2.50
2.56
b
Cv
0.44
0.34
0.43
0.44
0.40
0.32
0.40
0.34
0.49
0.36
0.44
0.82
0.42
0.88
0.23
0.35
0.40
0.23
0.41
0.56
0.47
0.84
0.50
0.90
0.70
1.22
0.70
1.38
Maximum operating
pressure differential
(MPa)
0.9
0.45
0.2
0.9
0.45
0.2
0.8
0.15
0.8
0.15
0.8
0.3
0.8
0.3
Weight
(g)
Note)
240
240
240
240
240
240
370
370
370
370
500
500
500
500
Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.
Refer to “Glossary of Terms” on page 31 for details on the maximum operating pressure differential.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
10 Note) to 60
Ambient temperature ( C)
20 to 60
Note) Dew point temperature: 10 C or less
Seal material Note2)
NBR (FKM)
Leakage rate (Air) Note1)
1 cm3/min or less (AIuminum body type)
15 cm3/min or less (Resin body type)
External Leakage
Seal material Note2)
NBR (FKM)
Leakage rate (Air) Note1)
1 cm3/min or less (AIuminum body type)
15 cm3/min or less (Resin body type)
Note 1) Leakage is the value at ambient temperature 20 C.
Note 2) For seal material/FKM, refer to “Other options” on page 20 for the
selection.
6
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Air Single Unit
VX2 1 0 A A
Common Specifications
Seal material
NBR
Coil insulation type Class B
Thread type
Fluid
N.O.
2
N.C.
Size 2
5
N.O.
3
N.C.
6
N.O.
Size 3
A
B
D
E
H
J
L
M
A
B
C
D
E
F
G
H
J
K
L
M
N
Voltage
2
1/8
Grommet
A
24 VDC
5
B
100 VAC
2
C
110 VAC
D
200 VAC
E
230 VAC
3
F
24 VDC
5
G
24 VDC
4
H
100 VAC
7
J
110 VAC
K
200 VAC
4
L
230 VAC
7
M
24 VDC
4
N
100 VAC
P
110 VAC
Q
200 VAC
R
230 VAC
5
S
24 VDC
8
T
100 VAC
10 (N.C. only)
U
110 VAC
V
200 VAC
W
230 VAC
2
1/4
ø6
3
3
5
Resin
2
ø8
1/4
Aluminum
3/8
ø8
Resin
ø10
4
7
7
5
1/4
8
10 (N.C. only)
Aluminum
Electrical entry
3
5
Aluminum
For Air
4
Size 1
A
B
C
D
E
F
H
J
K
L
M
N
Symbol
3/8
1/2
10 (N.C. only)
5
ø10
8
10 (N.C. only)
Resin
Grommet
With surge
voltage
suppressor
For Water
N.C.
Voltage/Electrical entry
DIN terminal
With surge
voltage
suppressor
For Oil
1
Orifice
diameter
For Steam
Symbol Valve type
Body
Symbol
Port size
material
Conduit terminal
With surge
voltage
suppressor
Conduit
With surge
voltage
suppressor
Construction
Size
Body material/Port size/Orifice diameter
Dimensions
Coil size/Valve type
Rc
One-touch fittings are attached
to the resin body type.
Air
For Medium
Vacuum
0
Faston terminal
5
ø12
8
Y
24 VDC
10 (N.C. only)
Z
Other voltages
For other special options, refer to
page 20.
24 VAC
48 VAC
Special voltage
220 VAC
240 VAC
12 VDC
DIN terminal with light
Conduit terminal with light
Without DIN connector
Low concentration ozone resistant
(Seal material: FKM)
Oil-free
G thread
Dimensions
Page 23 (Single unit)
Specifications
RoHS
How to Order (Single Unit)
NPT thread
7
Series VX21/22/23
For Air Manifold
For the fluid other than air and medium vacuum, please contact SMC.
Model/Valve Specifications
N.C.
Passage symbol
2 (OUT)
2 (OUT)
1 (IN)
Common SUP type
N.O.
Passage symbol
2 (OUT)
2 (OUT)
1 (IN)
Common SUP type
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Orifice diameter
(mmø)
Model
2
3
Cv
0.63
0.63
0.23
1.05
0.68
0.41
0.6
5
2.20
0.39
0.62
0.2
4
1.90
0.52
0.62
1.0
3.99
0.44
1.08
0.15
1.96
0.55
0.75
1.0
3.99
0.44
1.08
0.3
3
7
5
7
VX2A0
VX2B0
VX2C0
Normally Open (N.O.)
Size
C [dm3/(s·bar)]
b
Cv
0.63
0.63
0.23
Maximum operating
pressure differential
(MPa)
0.9
1.05
0.68
0.41
0.45
5
2.20
0.39
0.62
0.2
4
1.90
0.52
0.62
0.8
3.99
0.44
1.08
0.15
1.96
0.55
0.75
0.8
3.99
0.44
1.08
0.3
Orifice diameter
(mmø)
Model
2
1
2
3
Maximum operating
pressure differential
(MPa)
1.0
b
2
1
Flow-rate characteristics
C [dm3/(s·bar)]
3
7
5
7
VX2D0
VX2E0
VX2F0
Flow-rate characteristics
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
−10 Note) to 60
Note) Dew point temperature: –10 C or less
Ambient temperature ( C)
−20 to 60
Seal material Note 2)
Leakage rate Note 1)
NBR (FKM)
1 cm3/min or less
External Leakage
Seal material Note 2)
Leakage rate Note 1)
NBR (FKM)
1 cm3/min or less
Note 1) Leakage is the value at ambient temperature 20 C.
Note 2) For seal material/FKM, refer to “Other options” on page 20 for the
selection.
8
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Air Manifold
VX2 A 0 A A
Common Specifications
Seal material
Fluid
0
N.C.
B
E
N.C.
N.O.
C
F
Size 3
A
B
C
Resin
A
B
Resin
2
A
24 VDC
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
U
V
W
100 VAC
4
7
5
Resin
7
For other special options, refer to
page 20.
24 VAC
48 VAC
220 VAC
240 VAC
12 VDC
Special voltage
Grommet
3
5
A
B
N.C.
N.O.
Electrical entry
DIN terminal with light
Conduit terminal with light
Without DIN connector
Low concentration ozone resistant (Seal material: FKM)
Oil-free
Manifold Base/How to Order
VVX2 1 0 A 02
Grommet
With surge
voltage
suppressor
110 VAC
200 VAC
230 VAC
24 VDC
24 VDC
DIN terminal
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
24 VDC
Conduit terminal
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
24 VDC
Conduit
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
Faston terminal
Fluid
0
Coil size
Size Symbol
1
Size 2 2
Size 3 3
Size 1
Air
Y
Base material/Port size/Base type
Symbol
Base Individual Base
material port size type
A
1/8 Common
Aluminum
SUP
B
1/4
Common port size: 3/8
(IN port)
For size 2
For size 3
Symbol Stations
02
03
04
05
06
07
08
09
10
Symbol Oil-free
Dimensions
Page 29
Seal material
N
F
NBR
FKM
Special
thread
2 stations
Nil
—
Rc
3 stations
A
B
D
E
Z
—
G
4 stations
5 stations
6 stations
7 stations
8 stations
9 stations
10 stations
VVX021S 4A N
VVX022S 4A N
VVX023S 4A N
When mounting a blanking plate
assembly, if the solenoid valve for
the manifold is ozone resistant,
(Seal material: FKM), please select FKM.
24 VDC
Stations
Blanking Plate Assembly Part No.
For size 1
For Medium
Vacuum
N.O.
Voltage
For Water
A
D
Symbol
For Oil
Size 1
Orifice diameter
For Steam
Valve type
Voltage/Electrical entry
Construction
Symbol
Body
Symbol
material
For Air
Body material/Orifice diameter
Size
Size 2
Air
Z
Other voltages
How to Order Manifold Assembly (Example)
— NPT
G
NPT
Rc
Enter the valve and blanking plate to be mounted under the manifold
base part number.
<Example>
VVX210B05………...1
VX2A0AA ………….4
VVX021S-4A-N ……1
“ ” is the symbol for mounting.
Add an “ ” in front of the part numbers for solenoid
valves, etc. to be mounted.
D side Stations
1
2
3
4
5
U side
5 x Rc1/4
(Individual port)
Enter the product’s part number in order, counting the 1st station from the D side
(left in the manifold arrangement, when viewing the individual port in front).
9
Dimensions
Coil size/Valve type
NBR
Coil insulation type Class B
Specifications
RoHS
How to Order (Solenoid Valve for Manifold)
Series VX21/22/23
For Medium Vacuum Single Unit
Model/Valve Specifications
Passage symbol (Application example)
Passage symbol (Application example)
N.C.
N.O.
q Used with
vacuum
1
w Used with
pressure
2
1
q Used with
vacuum
2
1
Refer to “Glossary of Terms” on page 31 for passage symbols.
w Used with
pressure
2
1
2
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Port size
1
1/8, 1/4
Orifice diameter
(mmø)
Flow-rate characteristics
Cv
0.63
0.63
0.23
0 to 1.0
Weight
(g)
300
1.05
0.68
0.41
0 to 0.6
300
5
2.20
0.39
0.62
0 to 0.2
300
4
1.90
0.52
0.62
0 to 1.0
460
3.99
0.44
1.08
0 to 0.15
460
5
1.96
0.55
0.75
0 to 1.0
580
8
5.67
0.33
1.58
0 to 0.3
3
580
5.74
0.64
2.21
0 to 0.1
580
8.42
0.39
2.21
0 to 0.1
630
3
1/4, 3/8
7
1/4, 3/8
10
VX214
VX224
VX234
10
1/2
Note)
b
2
2
Operating pessure range
C [dm3/(s·bar)]
Model
q Used with vacuum (Pa·abs) w Used with pressure (MPa·G)
0.1 to
atmospheric
pressure
Normally Open (N.O.)
Size
Port size
Orifice diameter
(mmø)
Model
Flow-rate characteristics
C
[dm3/(s·bar)]
2
1
2
3
1/8, 1/4
1/4, 3/8
1/4, 3/8
3
VX244
Note)
Operating pessure range
b
Cv
0.63
0.63
0.23
Weight
q Used with vacuum (Pa·abs) w Used with pressure (MPa·G)
(g)
0 to 0.9
320
1.05
0.68
0.41
0 to 0.45
320
5
2.20
0.39
0.62
0 to 0.2
320
4
1.90
0.52
0.62
0 to 0.8
490
3.99
0.44
1.08
0 to 0.15
490
1.96
0.55
0.75
0 to 0.8
620
5.67
0.33
1.58
0 to 0.3
620
7
5
8
VX254
VX264
0.1 to
atmospheric
pressure
Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
Ambient temperature ( C)
Seal material
Leakage rate Note)
1 to 60 Note)
−20 to 60
FKM
10−6 Pa·m3/sec or less
Note) With no freezing
External Leakage
Seal material
Leakage rate Note)
FKM
10−6 Pa·m3/sec or less
Note) Leakage (10−6 Pa·m3/sec) is the value at differential pressure 0.1
MPa and ambient temperature 20 C.
10
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Medium Vacuum Single Unit
Common Specifications
VX2 1 4 A A
Seal material
Thread type
Fluid
2
N.C.
Size 2
5
N.O.
3
N.C.
6
N.O.
Size 3
A
B
D
E
H
J
L
M
A
B
C
D
E
F
G
H
J
K
L
M
N
P
A
24 VDC
5
B
100 VAC
2
C
110 VAC
D
200 VAC
E
230 VAC
3
F
24 VDC
5
G
24 VDC
4
H
100 VAC
7
J
110 VAC
K
200 VAC
4
L
230 VAC
7
M
24 VDC
4
N
100 VAC
P
110 VAC
Q
200 VAC
R
230 VAC
5
S
24 VDC
8
T
100 VAC
10 (N.C. only)
U
110 VAC
V
200 VAC
W
230 VAC
2
1/4
1/8
Stainless
steel
3
3
5
2
1/4
1/4
C37
3/8
Stainless
steel
1/4
3/8
4
7
7
5
1/4
8
10 (N.C. only)
C37
3/8
1/2
10 (N.C. only)
5
1/4
Stainless
steel
Grommet
3
5
C37
For Air
2
1/8
Electrical entry
For Medium
Vacuum
N.O.
Voltage
8
10 (N.C. only)
Grommet
With surge
voltage
suppressor
For Water
4
Size 1
A
B
C
D
E
F
H
J
K
L
M
N
Symbol
DIN terminal
With surge
voltage
suppressor
For Oil
N.C.
Voltage/Electrical entry
For Steam
1
Orifice
diameter
Conduit terminal
With surge
voltage
suppressor
Conduit
With surge
voltage
suppressor
Construction
Symbol Valve type
Body
Symbol
Port size
material
Non-leak
Dimensions
Size
Body material/Port size/Orifice diameter
Rc
Oil-free
4 Medium vacuum
Coil size/Valve type
FKM
Coil insulation type Class B
Faston terminal
5
3/8
8
Y
24 VDC
10 (N.C. only)
1/2
10 (N.C. only)
Z
Other voltages
For other special options, refer to
page 20.
24 VAC
48 VAC
Special voltage
220 VAC
240 VAC
12 VDC
DIN terminal with light
Conduit terminal with light
Without DIN connector
G thread
NPT thread
Dimensions
Page 26 (Single unit)
Specifications
RoHS
How to Order (Single Unit)
With bracket
11
Series VX21/22/23
For Medium Vacuum Manifold
For the fluid other than air and medium vacuum, please contact SMC.
Model/Valve Specifications
N.C.
Passage symbol
1 (IN)
1 (IN)
2 (OUT)
Individual SUP type
N.O.
Passage symbol
1 (IN)
1 (IN)
2 (OUT)
Individual SUP type
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Orifice diameter (mmø)
Model
Flow-rate characteristics
b
Cv
0.63
0.63
0.23
1.05
0.68
0.41
0.6
5
2.20
0.39
0.62
0.2
4
1.90
0.52
0.62
1.0
3.99
0.44
1.08
0.15
1.96
0.55
0.75
1.0
3.99
0.44
1.08
0.3
2
1
3
2
7
5
3
Maximum operating
pressure differential
(MPa)
1.0
C [dm3/(s·bar)]
7
VX2A4
VX2B4
VX2C4
Normally Open (N.O.)
C [dm3/(s·bar)]
b
Cv
0.63
0.63
0.23
Maximum operating
pressure differential
(MPa)
0.9
1.05
0.68
0.41
0.45
5
2.20
0.39
0.62
0.2
2
4
1.90
0.52
0.62
0.8
3.99
0.44
1.08
0.15
3
5
1.96
0.55
0.75
0.8
3.99
0.44
1.08
0.3
Size
Orifice diameter (mmø)
Model
Flow-rate characteristics
2
1
3
7
7
VX2D4
VX2E4
VX2F4
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
1 to 60 Note)
Note) With no freezing
Ambient temperature ( C)
−20 to 60
Seal material
Leakage rate Note)
FKM
10−6 Pa·m3/sec or less
External Leakage
Seal material
Leakage rate Note)
FKM
10−6 Pa·m3/sec or less
Note) Leakage (10−6Pa·m3/sec) is the value at differential pressure
0.1 MPa and ambient temperature 20 C.
12
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Medium Vacuum Manifold
VX2 A 4 A A
Common Specifications
Seal material
Fluid
Symbol
Body
material
Size 1
A
D
N.C.
N.O.
A
B
C
Resin
A
B
Resin
A
B
Resin
N.C.
N.O.
N.C.
N.O.
Electrical entry
2
3
5
4
7
5
7
For other special options, refer to
page 20.
24 VAC
48 VAC
Special voltage
Voltage
220 VAC
240 VAC
12 VDC
DIN terminal with light
Conduit terminal with light
Without DIN connector
Manifold Base/How to Order
VVX2 1 4 A 02
Grommet
A
24 VDC
B
C
D
E
F
G
H
J
K
L
M
N
P
Q
R
S
T
U
V
W
100 VAC
Grommet
With surge
voltage
suppressor
110 VAC
200 VAC
230 VAC
24 VDC
24 VDC
DIN terminal
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
24 VDC
Conduit terminal
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
24 VDC
Conduit
With surge
voltage
suppressor
100 VAC
110 VAC
200 VAC
230 VAC
Faston terminal
Fluid
4
Coil size
Size
Symbol
Size 1
1
2
3
Size 2
Size 3
Y
Medium vacuum
Base material/Port size/Base type
Base Individual Base
Symbol material
port size type
A
1/8 Individual
Aluminum
SUP
B
1/4
Common port size: 3/8
(OUT port)
For size 2
For size 3
Dimensions
Symbol Stations
02
03
04
05
06
07
08
09
10
Symbol Oil-free
2 stations
Nil
3 stations
A
B
4 stations
5 stations
6 stations
7 stations
8 stations
9 stations
10 stations
VVX021S 4A F
VVX022S 4A F
VVX023S 4A F
Page 29
24 VDC
Stations
Blanking Plate Assembly Part No.
For size 1
Construction
C
F
Symbol
—
Special
thread
Rc
Z
Other voltages
How to Order Manifold Assembly (Example)
G
NPT
Enter the valve and blanking plate to be mounted under the manifold
base part number.
<Example>
VVX214B05……......1
VX2A4AA ………….4
VVX021S-4A-F ……1
“ ” is the symbol for mounting.
Add an “ ” in front of the part numbers for solenoid
valves, etc. to be mounted.
D side Stations
1
2
SMC
3
SMC
5
4
SMC
U side
SMC
5 x Rc1/4
(Individual port)
Enter the product’s part number in order, counting the 1st station from the D side
(left in the manifold arrangement, when viewing the individual port in front).
13
Dimensions
Size 3
B
E
Orifice
diameter
For Medium
Vacuum
Valve type
For Water
Symbol
Non-leak
Voltage/Electrical entry
For Air
Body material/Orifice diameter
Size
Size 2
Oil-free
For Oil
Coil size/Valve type
Medium vacuum
For Steam
4
FKM
Coil insulation type Class B
Specifications
RoHS
How to Order (Solenoid Valve for Manifold)
Series VX21/22/23
For Water Single Unit
Model/Valve Specifications
Passage symbol
Passage symbol
N.C.
1
N.O.
2
1
Refer to “Glossary of Terms” on page 31 for passage symbols.
2
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Port size
1
1/8, 1/4
Orifice diameter
(mmø)
Model
Flow-rate characteristics
AV (x 10−6 m2)
Conversion Cv
2
2
3
5.5
0.23
1
300
0.42
0.6
300
5
15.0
0.63
0.2
300
4
15.0
0.63
1
460
26.0
1.08
0.15
460
5
18.0
0.75
1
580
8
38.0
1.58
0.3
580
53.0
2.21
0.1
580
53.0
2.21
0.1
630
Maximum operating
pressure differential (MPa)
Weight
(g)
7
1/4, 3/8
10
1/2
Note)
Weight
(g)
10.0
3
1/4, 3/8
Maximum operating
pressure differential (MPa)
VX212
VX222
VX232
10
Normally Open (N.O.)
Size
Port size
1
1/8, 1/4
Orifice diameter
(mmø)
Model
Flow-rate characteristics
AV (x 10−6 m2)
Conversion Cv
2
2
3
1/4
1/4, 3/8
Note)
5.5
0.23
0.9
320
10.0
0.42
0.45
320
5
15.0
0.63
0.2
320
4
15.0
0.63
0.8
490
26.0
1.08
0.15
490
18.0
0.75
0.8
620
38.0
1.58
0.3
620
3
7
5
8
VX242
VX252
VX262
Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.
• Refer to “Glossary of Terms” on page 31 for details on the maximum operating pressure differential.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
Ambient temperature ( C)
1 to 60 Note)
−20 to 60
Note) With no freezing
Seal material Note 2)
NBR (FKM)
Leakage rate (Water) Note 1)
0.1 cm3/min or less
External Leakage
Seal material Note 2)
NBR (FKM)
Leakage rate (Water) Note 1)
0.1 cm3/min or less
Note 1) Leakage is the value at ambient temperature 20 C.
Note 2) For seal material/FKM, refer to “Other options” on page 20 for the
selection.
14
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Water Single Unit
VX2 1 2 A A
Common Specifications
Seal material
NBR
Coil insulation type Class B
Thread type
Rc
Fluid
N.O.
2
N.C.
Size 2
5
3
N.O.
N.C.
Size 3
6
N.O.
A
B
D
E
H
J
L
M
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Voltage
2
1/8
A
24 VDC
5
B
100 VAC
2
C
110 VAC
D
200 VAC
E
230 VAC
3
F
24 VDC
5
G
24 VDC
4
H
100 VAC
7
J
110 VAC
K
200 VAC
4
L
230 VAC
7
M
24 VDC
4
N
100 VAC
P
110 VAC
Q
200 VAC
R
230 VAC
2
1/4
1/8
3
3
5
Stainless
steel
2
1/4
1/4
C37
3/8
Stainless
steel
1/4
3/8
4
7
7
5
1/4
8
10 (N.C. only)
C37
3/8
1/2
5
S
24 VDC
8
T
100 VAC
10 (N.C. only)
U
110 VAC
V
200 VAC
W
230 VAC
10 (N.C. only)
5
1/4
Stainless
steel
Grommet
3
5
C37
Electrical entry
For Medium
Vacuum
4
Size 1
A
B
C
D
E
F
H
J
K
L
M
N
Symbol
8
10 (N.C. only)
Grommet
With surge
voltage
suppressor
For Water
N.C.
Voltage/Electrical entry
DIN terminal
With surge
voltage
suppressor
For Oil
1
Orifice
diameter
Conduit terminal
With surge
voltage
suppressor
For Steam
Symbol Valve type
Body
Symbol
Port size
material
Conduit
With surge
voltage
suppressor
Construction
Size
Body material/Port size/Orifice diameter
Faston terminal
Dimensions
Coil size/Valve type
Water
For Air
2
5
3/8
8
Y
24 VDC
10 (N.C. only)
1/2
10 (N.C. only)
Z
Other voltages
For other special options, refer
to page 20.
24 VAC
48 VAC
Special voltage
220 VAC
240 VAC
12 VDC
DIN terminal with light
Conduit terminal with light
Without DIN connector
Applicable to deionized water (Seal material: FKM)
Oil-free
G thread
NPT thread
Dimensions
Page 26 (Single unit)
Specifications
RoHS
How to Order (Single Unit)
With bracket
15
Series VX21/22/23
For Oil Single Unit
When the fluid is oil.
The kinematic viscosity must not exceed 50 mm2/s.
The special construction of the armature adopted in the built-in
full-wave rectifier type gives an improvement in OFF response by
providing clearance on the absorbed surface when it is switched ON.
Model/Valve Specifications
Passage symbol
Passage symbol
N.C.
1
N.O.
2
1
Refer to “Glossary of Terms” on page 31 for passage symbols.
2
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Port size
Orifice diameter
(mmø)
Model
Flow-rate characteristics
-6
AV (x 10 m )
2
1
1/8, 1/4
2
3
0.23
1
300
0.42
0.6
300
5
15.0
0.63
0.2
300
4
15.0
0.63
1
460
26.0
1.08
0.15
460
5
18.0
0.75
1
580
8
38.0
1.58
0.3
580
53.0
2.21
0.1
580
53.0
2.21
0.1
630
VX223
VX233
10
1/2
Note)
Weight
(g)
10.0
VX213
7
1/4, 3/8
Conversion Cv
Maximum operating
pressure differential
(MPa)
5.5
3
1/4, 3/8
2
10
Normally Open (N.O.)
Size
Port size
1
1/8, 1/4
Orifice diameter
(mmø)
Model
Flow-rate characteristics
AV (x 10-6m2)
Conversion Cv
2
2
3
5.5
0.23
0.9
320
0.42
0.45
320
5
15.0
0.63
0.2
320
4
15.0
0.63
0.8
490
26.0
1.08
0.15
490
18.0
0.75
0.8
620
38.0
1.58
0.3
620
VX253
7
5
1/4, 3/8
Note)
Weight
(g)
10.0
VX243
3
1/4
Maximum operating
pressure differential
(MPa)
VX263
8
Note) Weight of grommet type. Add 10 g for conduit type, 30 g for DIN terminal type, 60 g for conduit terminal type respectively.
• Refer to “Glossary of Terms” on page 31 for details on the maximum operating pressure differential.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
−5 Note)
Ambient temperature ( C)
Seal material
Leakage rate (Oil) Note)
−20 to 60
FKM
0.1 cm3/min or less
to 60
Note) Kinematic viscosity: 50
mm2/s
or less
External Leakage
Seal material
Leakage rate (Oil) Note)
FKM
0.1 cm3/min or less
Note) Leakage is the value at ambient temperature 20 C.
16
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Oil Single Unit
VX2 1 3 A A
Common Specifications
Seal material
Fluid
N.O.
2
N.C.
Size 2
5
3
N.O.
N.C.
Size 3
6
N.O.
A
B
D
E
H
J
L
M
A
B
C
D
E
F
G
H
J
K
L
M
N
P
Symbol
Voltage
2
1/8
A
24 VDC
5
B
100 VAC
2
C
110 VAC
D
200 VAC
E
230 VAC
3
F
24 VDC
5
G
24 VDC
4
H
100 VAC
7
J
110 VAC
K
200 VAC
4
L
230 VAC
7
M
24 VDC
4
N
100 VAC
P
110 VAC
Q
200 VAC
R
230 VAC
2
1/4
1/8
3
3
5
Stainless
steel
2
1/4
1/4
C37
3/8
Stainless
steel
1/4
3/8
4
7
7
5
1/4
8
10 (N.C. only)
C37
3/8
1/2
5
S
24 VDC
8
T
100 VAC
10 (N.C. only)
U
110 VAC
V
200 VAC
W
230 VAC
10 (N.C. only)
5
1/4
Stainless
steel
Grommet
3
5
C37
Electrical entry
For Medium
Vacuum
4
Size 1
A
B
C
D
E
F
H
J
K
L
M
N
Voltage/Electrical entry
8
10 (N.C. only)
Grommet
With surge
voltage
suppressor
For Water
N.C.
Orifice
diameter
DIN terminal
With surge
voltage
suppressor
For Oil
1
Body
Symbol
Port size
material
Conduit terminal
With surge
voltage
suppressor
For Steam
Symbol Valve type
Body material/Port size/Orifice diameter
Rc
Conduit
With surge
voltage
suppressor
Construction
Size
Thread type
Faston terminal
Dimensions
Coil size/Valve type
Oil
For Air
3
FKM
Coil insulation type Class B
5
3/8
8
Y
24 VDC
10 (N.C. only)
1/2
10 (N.C. only)
Z
Other voltages
For other special options, refer to
page 20.
24 VAC
48 VAC
Special voltage
220 VAC
240 VAC
12 VDC
DIN terminal with light
Conduit terminal with light
Without DIN connector
Oil-free
G thread
NPT thread
Dimensions
Page 26 (Single unit)
Specifications
RoHS
How to Order
With bracket
17
Series VX21/22/23
For Steam Single Unit
Can be used with heated water.
Model/Valve Specifications
Passage symbol
Passage symbol
N.C.
1
N.O.
2
1
2
Refer to “Glossary of Terms” on page 31 for passage symbols.
Normally Closed (N.C.)
Size
Port size
Orifice diameter
(mmø)
Model
2
1
2
3
1/8, 1/4
AV (x 10 m )
Conversion Cv
Maximum operating
pressure differential
(MPa)
1
Note)
Weight
(g)
0.23
0.42
0.6
300
5
15.0
0.63
0.2
300
4
15.0
0.63
1
460
26.0
1.08
0.15
460
5
18.0
0.75
1
580
8
38.0
1.58
0.3
580
53.0
2.21
0.1
580
53.0
2.21
0.1
630
10
1/2
2
10.0
7
1/4, 3/8
−6
5.5
3
1/4
Flow-rate characteristics
VX215
VX225
VX235
10
300
Normally Open (N.O.)
Size
Port size
1
1/8, 1/4
5.5
0.23
10.0
0.42
0.45
320
5
15.0
0.63
0.2
320
4
15.0
0.63
0.8
490
26.0
1.08
0.15
490
18.0
0.75
0.8
620
38.0
1.58
0.3
620
Model
2
2
3
1/4
1/4, 3/8
Note)
Maximum operating
pressure differential
(MPa)
0.9
Orifice diameter
(mmø)
3
7
5
8
VX245
VX255
VX265
Flow-rate characteristics
AV (x 10−6 m2)
Conversion Cv
Weight
(g)
320
Note) Weight of grommet type. Add 10 g for conduit type, 60 g for conduit terminal type respectively.
Fluid and Ambient Temperature
Valve Leakage
Internal Leakage
Fluid temperature ( C)
Steam: 183 or less
Heated water: 99 or less
Ambient temperature ( C)
−20 to 60
Fluid
Steam
Heated water
Seal material
FKM for high temperature
Leakage rate
1.0 cm3/min or less
0.1 cm3/min or less
External Leakage
Fluid
Steam
Heated water
18
Seal material
FKM for high temperature
Leakage rate
1.0 cm3/min or less
0.1 cm3/min or less
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
For Steam Single Unit
Can be used with heated water.
VX2 1 5 A B
Seal material
FKM for high temperature
Coil insulation type
Fluid
5
Common Specifications
Class H
Thread type
Steam
Specifications
RoHS
How to Order (Single Unit)
Rc
4
N.O.
2
N.C.
5
N.O.
Size 2
3
N.C.
Size 3
6
N.O.
A
B
D
E
H
J
L
M
A
B
C
D
E
F
G
H
J
K
L
M
N
P
1/8
B
100 VAC
3
C
110 VAC
D
200 VAC
3
E
230 VAC
5
N
100 VAC
2
P
110 VAC
Q
200 VAC
2
R
230 VAC
3
T
100 VAC
5
U
110 VAC
4
V
200 VAC
7
W
230 VAC
5
C37
2
1/4
1/8
3
5
Stainless
steel
1/4
1/4
C37
3/8
Stainless
steel
2
1/4
3/8
4
7
4
7
Z
Electrical entry
Grommet
With surge
voltage
suppressor
For Medium
Vacuum
Size 1
A
B
C
D
E
F
H
J
K
L
M
N
Voltage
Conduit terminal
With surge
voltage
suppressor
For Water
N.C.
Symbol
Conduit
With surge
voltage
suppressor
For Oil
1
Voltage/Electrical entry
Orifice
diameter
Other voltages
DIN terminal, Faston terminal or DC specification are not
available.
4
7
5
1/4
8
10 (Only N.C.)
C37
5
3/8
8
10 (Only N.C.)
1/2
Stainless
steel
24 VAC
10 (Only N.C.)
5
1/4
For other special options, refer to
page 20.
8
Special voltage
240 VAC
10 (Only N.C.)
3/8
1/2
48 VAC
220 VAC
5
Conduit terminal with light
8
Oil-free
10 (Only N.C.)
G thread
10 (Only N.C.)
NPT thread
With bracket
Dimensions
For Steam
Symbol Valve type
Body
Symbol
Port size
material
Construction
Size
Body material/Port size/Orifice diameter
Dimensions
Coil size/Valve type
For Air
Can be used with heated water.
Page 28 (Single unit)
19
Series
VX21/22/23
Other Special Options
Other options
Electrical options
(Special voltage, with light)
VX2 1 0 A Z 1A
Enter standard
product number.
Electrical option
Specification
Special voltage
With light
Without DIN connector
20
Voltage
1A
1B
1C
1U
1D
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
1E
12 VDC
1F
1G
1H
1V
1J
1K
1L
1M
1W
1N
1P
1Q
1R
1Y
1S
1T
2A
2B
2C
2D
2E
2F
2G
2H
2V
2J
2K
2L
2M
2N
2P
2Q
2R
2S
2W
2T
3A
3B
3C
3D
3E
3F
3G
3H
3V
3J
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
12 VDC
24 VDC
100 VAC
110 VAC
200 VAC
230 VAC
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
24 VDC
100 VAC
110 VAC
200 VAC
230 VAC
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
24 VDC
100 VAC
110 VAC
200 VAC
230 VAC
48 VAC
220 VAC
240 VAC
24 VAC
12 VDC
VX2 1 0 A A Z
Enter standard
product number.
Special voltage/Electrical entry/Electrical option
Symbol
(Low concentration ozone resistant and applicable
to deionized water, Oil-free, Port thread)
Electrical entry
Grommet
(With surge voltage suppressor)
Grommet
Grommet
(With surge voltage suppressor)
DIN terminal
(With surge voltage suppressor)
Conduit terminal
(With surge voltage suppressor)
Other option
Low concentration ozone resistant and applicable
to deionized water/Oil-free/Port thread
Symbol
Low concentration ozone resistant and applicable
Oil-free
to deionized water 1 (Seal material: FKM)
A
B
C
D
E
F
G
H
K
L
Z
Port thread
G
NPT
— Standard (Rc) 2
G
—
NPT
G
—
NPT
Standard (Rc) 2
G
NPT
—
Standard (Rc) 2
1 Applicable to air (VX2 0) and water (VX2 2)
2 When the body is resin, one-touch fittings are equipped
as standard.
—
—
With Bracket (shipped together)
Conduit
(With surge voltage suppressor)
Faston terminal
1 Only for C37 and stainless steel body materials.
(Select C37 from model for water when interchangeable product is
necessary for air.)
2 When the orifice is ø8, ø10, and when the body port size is 1/4 or 3/8,
use a foot type bracket. (The old VX series is not compatible. If the
body port size is 1/2, there are no XB settings (Refer to the following).
3 On the bottom side of the standard body, there are no mounting
holes. Please be careful because the bracket cannot be retrofit.
(Please inquire separately regarding mounting holes on the
bottom side of the body.)
VX
DIN terminal
(With surge voltage suppressor)
XB
Enter standard product number.
With bracket (shipped together)
Bracket interchangeable with an old type
Conduit terminal
(With surge voltage suppressor)
Size
Port size
1
1/8, 1/4
2
1/4, 3/8
3
1/4, 3/8
1/2
DIN terminal
(With surge voltage suppressor)
Orifice diameter (mmø) Bracket interchangeable with an old type
2
(Interchangeable)
3
(Interchangeable)
5
(Interchangeable)
4
(Interchangeable)
7
(Interchangeable)
5
(Interchangeable)
8
× (Not interchangeable) 2
10
× (Not interchangeable) 2
10
—2
Enter symbols in the order below when ordering a combination of
electrical option, other option and with bracket.
Example) VX2 1 2 A Z 1A Z XB
Electrical option
Other option
With bracket
Other Special Options
Series VX21/22/23
q
w
w
e
e
r
r
t
t
y
y
OUT
IN
For Medium
Vacuum
q
For Air
Body material: Resin
OUT
IN
For Water
Normally Closed (N.C.)
Body material: AIuminum, C37, Stainless steel
Specifications
Construction/Single Unit
u
1
Solenoid coil
2
Core
3
4
5
Armature assembly
6
7
Material
Component Parts
No.
Description
Material
1
Solenoid coil
Fe
2
Core
Fe
Tube
Stainless steel
3
Tube
Stainless steel
Spring
Stainless steel
4
Spring
NBR, FKM, Stainless steel
5
Armature assembly
Seal
NBR, FKM
6
Seal
NBR, FKM
Body
Aluminum, C37, Stainless steel
7
Body
Resin (PBT)
Cu
Fe
Resin
Normally Open (N.O.)
Body material: AIuminum, C37, Stainless steel
Cu
Fe
Resin
For Oil
Description
Stainless steel
NBR, Stainless steel
For Steam
No.
Body material: Resin
q
t
q
t
w
y
w
y
e
u
e
u
r
i
r
i
IN
OUT
IN
OUT
o
o
Component Parts
No.
Component Parts
Description
1
Solenoid coil
2
Sleeve assembly
3
Push rod assembly
4
Spring
5
Construction
Component Parts
Dimensions
u
Material
No.
Description
Material
1
Solenoid coil
Stainless steel, Resin (PPS)
2
Sleeve assembly
Resin (PPS), Stainless steel, NBR, FKM
3
Push rod assembly
Stainless steel
4
Spring
O-ring A
NBR, FKM
5
O-ring A
6
O-ring B
NBR, FKM
6
O-ring B
NBR, FKM
7
Adapter
Resin (PPS)
7
Adapter
Resin (PPS)
8
O-ring C
NBR, FKM
8
O-ring C
9
Body
Aluminum, C37, Stainless steel
9
Body
Cu
Fe
Resin
Cu
Fe
Resin
Stainless steel, Resin (PPS)
Resin (PPS), Stainless steel, NBR, FKM
Stainless steel
NBR, FKM
NBR, FKM
Resin (PBT)
21
Series VX21/22/23
Construction/Manifold
Normally Closed (N.C.) Common SUP type (for air)
Base material: Aluminum
q
OUT
Individual SUP type (for medium vacuum)
q
w
w
e
e
r
r
t
t
y
y
u
u
i
i
IN
o
o
OUT port
IN port
Component Parts
No.
1
2
3
4
5
6
7
8
9
Description
Solenoid coil
Core
Tube
Spring
Armature assembly
Seal
Body
Gasket
Base
Material
Cu + Fe + Resin
Fe
Stainless steel
Stainless steel
NBR, FKM, Stainless steel
NBR, FKM
Resin (PPS)
NBR, FKM
Aluminum
Normally Open (N.O.)
Base material: Aluminum Common SUP type (for air)
q
Individual SUP type (for medium vacuum)
q
t
t
w
y
w
e
u
e
u
r
i
r
i
o
o
!0
!0
!1
OUT
!1
IN
OUT port
IN port
Component Parts
No.
1
2
3
4
5
6
22
Description
Solenoid coil
Sleeve assembly
Push rod assembly
Spring
O-ring A
O-ring B
y
Material
Cu + Fe + Resin
Stainless steel, Resin (PPS)
Resin (PPS), Stainless steel, NBR, FKM
Stainless steel
NBR, FKM
NBR, FKM
No.
7
8
9
10
11
Description
Adapter
O-ring C
Body
Gasket
Base
Material
Resin (PPS)
NBR, FKM
Resin (PPS)
NBR, FKM
Aluminum
Series VX21/22/23
Direct Operated 2 Port Solenoid Valve
Air
Grommet (DC)
Grommet (with surge voltage suppressor)
D
Q
F
D
Q
300
F
E
For Air
R
C
R
C
300
2xP
Port size
B1
B
DIN terminal
A
B1
B
For Medium
Vacuum
A
Conduit terminal
F
G1/2
D
Q 2
F
C
R
R
C
T
25
32
(44)
31.5
34
For Water
Q
S
Cable ø6 to ø12
D
E
E
G1/2
A
2xP
Port size
B1
B
A
S 2
B1
For Steam
2xP
Port size
B
Conduit
Faston terminal
Q
280
F
D
Q
11
F
A
2xP
Port size
B1
B
A
B1
B
Terminal part
(mm)
1
2
3
Size
1
2
3
P
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
A
19
24
24
30
Port size
P
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
B
B1
43
45
45
50
21
22.5
22.5
25
C
D
61 (67)
76 (84)
81 (89)
86.5
30
35
40
40
E
9.5
12
12
15
Electrical entry
Grommet (with
surge voltage
Grommet
suppressor)
F
20
22
24.5
24.5
Q
R
Q
R
27
29.5
32
32
42 (47.5)
53.5 (61.5)
58 (66.5)
61
30
32.5
35
35
28.5 (34)
39.5 (47.5)
44.5 (52.5)
47.5
Electrical entry
Conduit terminal
DIN terminal
Conduit
11
6.5
Port size
Faston connector
250 Series
9
15
Size
Dimensions
2xP
Port size
E
E
R
C
R
C
23
G1/2
Construction
D
For Oil
E
2xP
Port size
Specifications
Dimensions/Body Material: Aluminum
Faston terminal
Q
R
S
Q
R
S
T
Q
R
Q
R
64.5
67
69.5
69.5
34 (39.5)
45 (53)
50 (58)
53
52.5
55
57.5
57.5
99.5
102
104.5
104.5
36 (41.5)
47 (55)
52 (60)
55
68.5
71
73.5
73.5
77 (83)
91 (99)
96 (104)
101.5
47.5
50
52.5
52.5
36 (41.5)
47 (55)
52 (60)
55
23
25.5
28
28
42 (47.5)
53.5 (61.5)
58 (66.5)
61
( ): Denotes the Normally Open (N.O.) dimensions.
23
Series VX21/22/23
For Air
Dimensions/Body Material: Resin
Y
W
Q
F
D
2 x ø3.4
Mounting
hole
X1
R
C
2 x ø3.4
Mounting
hole
Y
W
B
X
U
2 x ø3.4
Mounting
hole
X1
X1
U1
X
U
F
Q
S
2 x ø3.4
Mounting
hole
D
F
Q±2
34
C
R
R
C
T
25
32
31.5
D
Y
W
Conduit terminal
U1
Cable ø6 to ø12
(44)
B1
2xP
Port size
B
DIN terminal
E
1.2
G1/2
E
1.2
F
E
1.2
1.2
E
B1
2xP
Port size
G1/2
Q
300
R
C
300
X
U
U1
X
X1
U1
D
Y
W
Grommet (with surge
voltage suppressor)
U
Grommet
B1
2xP
Port size
S±2
2xP
Port size
B
B1
B
(mm)
Size
For information on handling
one-touch fittings and
appropriate tubing, refer to
page 41 and KQ2 series
one-touch fittings in Best
Pneumatics No. 6.
The KQ2 series information
can be downloaded from the
following SMC website,
http://www.smcworld.com
24
1
2
3
One-touch
fitting P
ø6, ø8
ø8, ø10
ø10, ø12
B
B1
C
D
E
F
53.5
66
68
29
36
37
65.5 (71.5)
76.5 (84.5)
84 (92)
30
35
40
13.5
15
16.5
20
22
24.5
Mounting bracket dimensions
U
U1
W
X
X1
Y
45
53
58
22.5
26.5
29
22
27
31
52
62
67
26
31
33.5
30
35
40
Electrical entry
Size
1
2
3
One-touch
fitting P
ø6, ø8
ø8, ø10
ø10, ø12
Grommet
Grommet (with surge
voltage suppressor)
DIN terminal
Q
R
Q
R
Q
27
29.5
32
42.5 (48)
51 (59)
56.5 (65)
30
32.5
35
29 (34.5)
37 (45)
43 (51)
64.5
67
69.5
( ): Denotes the Normally Open (N.O.) dimensions.
R
Conduit terminal
S
Q
34.5 (40) 52.5 99.5
43 (50.5) 55
102
48.5 (56.5) 57.5 104.5
R
S
36.5 (42) 68.5
45 (52.5) 71
50.5 (58.5) 73.5
T
81.5 (87)
91.5 (99.5)
98.5 (106.5)
Series VX21/22/23
Direct Operated 2 Port Solenoid Valve
Air
Faston terminal
D
X
11
F
Q
For Water
R
C
E
1.2
R
C
E
2xP
Port size
B1
B
B1
B
For Oil
1.2
2xP
Port size
For Air
F
2 x ø3.4
Mounting
hole
For Medium
Vacuum
Q
280
X1
U1
X1
U1
D
2 x ø3.4
Mounting
hole
23
G1/2
Y
W
X
U
Y
W
U
Conduit
Specifications
Dimensions/Body Material: Resin
Terminal part
Faston connector
250 Series
11
One-touch
fitting P
B
B1
C
D
E
F
1
2
3
ø6, ø8
ø8, ø10
ø10, ø12
53.5
66
68
29
36
37
65.5 (71.5)
76.5 (84.5)
84 (92)
30
35
40
13.5
15
16.5
20
22
24.5
For Steam
U
U1
W
X
X1
Y
Q
R
Q
R
45
53
58
22.5
26.5
29
22
27
31
52
62
67
26
31
33.5
30
35
40
47.5
50
52.5
36.5 (42)
45 (52.5)
50.5 (58.5)
23
25.5
28
42.5 (48)
51 (59)
56.5 (65)
( ): Denotes the Normally Open (N.O.) dimensions.
25
Construction
Size
(mm)
Electrical entry
Conduit
Faston terminal
Mounting bracket dimensions
Dimensions
15
6.5
9
Series VX21/22/23
For Medium Vacuum, Water, Oil
Dimensions/Body Material: C37, Stainless Steel
Grommet
Grommet (with surge voltage suppressor)
D
Q
D
F
F
Q
300
B1
A
B
B1
B
M
W
U
2xP
Port size
M
W
U
2xP
Port size
E
Y
A
E
Y
1.5
1.5
R
R
C
C
300
X
2 x ø5.3
Mounting
hole
DIN terminal
D
X
2 x ø5.3
Mounting
hole
Conduit terminal
F
Q
S
Cable ø6 to ø12
G1/2
D
Q±2
C
25
32
F
B1
A
B
B1
2xP
Port size
B
2 x ø5.3
Mounting
hole
M
W
U
M
W
U
2xP
Port size
S±2
E
Y
A
E
Y
1.5
1.5
R
R
C
T
(44)
31.5
34
X
X
2 x ø5.3
Mounting
hole
(mm)
Size
Port size
A
B
B1
C
D
E
F
1
2
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
19
22
22
29.5
43
45
45
50
21
22.5
22.5
25
61 (67)
74.5 (82.5)
79 (88)
85.5
30
35
40
40
9.5
10.5
10.5
14
20
22
24.5
24.5
3
P
Mounting bracket dimensions
M
U
W
X
Y
12.8
19
19
—
46
56
56
—
36
46
46
—
11
13
13
—
6
7
7
—
Electrical entry
Size
Port size
1
2
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
3
P
Grommet
Grommet (with surge
voltage suppressor)
Conduit terminal
Q
R
Q
R
Q
R
S
Q
R
S
T
27
29.5
32
32
42 (47.5)
53.5 (61.5)
57.5 (67)
61
30
32.5
35
35
28.5 (34)
39.5 (47.5)
44 (53)
47.5
64.5
67
69.5
69.5
34 (39.5)
45 (53)
49.5 (58.5)
53
52.5
55
57.5
57.5
99.5
102
104.5
104.5
36 (41.5)
47 (55)
51.5 (60.5)
55
68.5
71
73.5
73.5
77 (83)
89.5 (97.5)
94 (103)
100.5
( ): Denotes the Normally Open (N.O.) dimensions.
26
DIN terminal
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
Medium Water
vacuum
Oil
Conduit
Faston terminal
Q
F
D
11
Q
F
For Air
1.5
B1
A
B
B1
E
Y
B
2xP
Port size
M
W
U
6.5
11
9
15
M
W
U
For Medium
Vacuum
E
Y
A
2xP
Port size
X
2 x ø5.3
Mounting
hole
X
Dimensions
Construction
For Steam
2 x ø5.3
Mounting
hole
For Oil
1.5
R
C
280
For Water
D
R
C
G1/2
Specifications
Dimensions/Body Material: C37, Stainless Steel
(mm)
Size
Port size
A
B
B1
C
D
E
F
1
2
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
19
22
22
29.5
43
45
45
50
21
22.5
22.5
25
61 (67)
74.5 (82.5)
79 (88)
85.5
30
35
40
40
9.5
10.5
10.5
14
20
22
24.5
24.5
3
Size
1
2
3
P
Port size
P
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
Conduit
Mounting bracket dimensions
M
U
W
X
Y
12.8
19
19
—
46
56
56
—
36
46
46
—
11
13
13
—
6
7
7
—
Electrical entry
Faston terminal
Q
R
Q
R
47.5
50
52.5
52.5
36 (41.5)
47 (55)
51.5 (60.5)
55
23
25.5
28
28
42 (47.5)
53.5 (61.5)
57.5 (67)
61
( ): Denotes the Normally Open (N.O.) dimensions.
27
Series VX21/22/23
For Steam
Can be used with heated water.
Dimensions/Body Material: C37, Stainless Steel
Grommet
Conduit terminal
D
Q
300
D
(42)
34
F
F
Q 2
C
R
R
C
T
25
32
40
1.5
1.5
For steam and heated water
With full-wave rectifier
A
B
B1
2xP
Port size
M
W
U
B
M
W
U
2xP
Port size
S 2
E
Y
B1
E
Y
A
X
2 x ø5.3
Mounting
hole
2 x ø5.3
Mounting
hole
X
Conduit
Q
280
D
F
45
(42)
R
C
23
G1/2
1.5
For steam and heated water
With full-wave rectifier
B1
E
Y
A
B
M
W
U
2xP
Port size
X
2 x ø5.3
Mounting
hole
(mm)
Size
Port size
A
B
B1
C
D
E
F
1
2
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
19
22
22
29.5
43
45
45
50
21
22.5
22.5
25
61 (67)
74.5 (82.5)
79 (88)
85.5
30
35
40
40
9.5
10.5
10.5
14
20
22
24.5
24.5
3
Size
1
2
3
P
Port size
P
1/8, 1/4
1/4, 3/8
1/4, 3/8
1/2
M
U
W
X
Y
12.8
19
19
—
46
56
56
—
36
46
46
—
11
13
13
—
6
7
7
—
Electrical entry
Conduit terminal
Grommet
Conduit
Q
R
Q
R
S
T
Q
R
27
29.5
32
32
42 (47.5)
53.5 (61.5)
57.5 (66)
61
108
110.5
113
113
36 (41.5)
47 (55)
51.5 (59.5)
55
77
79.5
82
82
77 (83)
89.5 (97.5)
94 (103)
100.5
47.5
50
52.5
52.5
36 (41.5)
47 (55)
51.5 (59.5)
55
( ): Denotes the Normally Open (N.O.) dimensions.
DIN terminal and Faston terminal are not available for valves for steam and heated water.
28
Mounting bracket dimensions
Direct Operated 2 Port Solenoid Valve
Series VX21/22/23
Air
Medium
vacuum
Specifications
Dimensions/Manifold/Base Material: Aluminum
2 x 3/8 <Common port>
IN port (For common SUP type)
OUT port (For individual SUP type)
L2
Plug
K
P
F
N
D
A
H
280
300
300
For Medium
Vacuum
11
S1
S2
J
Q3
Q5
Q2
Q1
Q6
Q4
G1/2
32
25
D side port does not have a plug.
1
2
3
4
6
5
U side
7
For Oil
Stations
D side
For Air
L1
For Water
K
C
B
2 x øM
Mounting
hole
Cable ø6 to ø12
G1/2
For Steam
Construction
D
E
R4
R3
R2
R5
R1, R6
T
(44)
G1/2
F
F
Dimensions
n x 1/8,1/4 <Individual port>
OUT port (For common SUP type)
IN port (For individual SUP type)
(mm)
Size
1
2
3
Size
1
2
3
Dimensions
L1
L2
L1
L2
L1
L2
2
3
4
5
6
7
8
9
10
86
100
90
108
103
121
122
136
126
144
144
162
158
172
162
180
185
203
194
208
198
216
226
244
230
244
234
252
267
285
266
280
270
288
308
326
302
316
306
324
349
367
338
352
342
360
390
408
374
388
378
396
431
449
A
B
C
D
E
F
H
J
K
M
N
P
38
49
49
15.5
18
20.5
10.5
13
13
11
13
13
25
30
30
32
36
40
20
22
24.5
12
15
15
7
9
9
6.5
8.5
8.5
50.5 (56.5)
60.5 (68.5)
65.5 (73.5)
36
36
41
Grommet
Size
1
2
3
n (stations)
Q1
27
29.5
32
R1
Grommet (With surge
voltage suppressor)
Q2
40.5 (46.5) 30
49.5 (57.5) 32.5
54.5 (63) 35
DIN terminal
R2
Q3
27 (33)
36 (44)
41 (49)
64.5
67
69.5
R3
Conduit terminal
S1
Q4
32.5 (38.5) 52.5 99.5
41.5 (49.5) 55
102
46.5 (55) 57.5 104.5
R4
S2
34.5 (40.5) 68.5
43.5 (51.5) 71
48.5 (57) 73.5
Conduit
T
Q5
66.5 (72) 47.5
75.5 (83.5) 50
80.5 (89.5) 52.5
R5
Faston terminal
Q6
34.5 (40.5) 23
43.5 (51.5) 25.5
48.5 (57) 28
R6
40.5 (46.5)
49.5 (57.5)
54.5 (63)
( ): Denotes the Normally Open (N.O.) dimensions.
When using a DIN terminal that faces downward, be careful of interference in the electrical wires and piping.
29
Series VX21/22/23
For Air, Medium Vacuum, Water, Oil
Replacement Parts
DIN Connector Part No.
Without electrical option
With electrical option (light)
C18312G6GCU
GDM2A L
Electrical option
L
Gasket for DIN Connector
VCW20-1-29-1
Lead Wire Assembly for Faston
Terminal (Set of 2 pcs.)
VX021S-1-16FB
30
With light
Rated voltage
1
100 VAC, 110 VAC
200 VAC, 220 VAC
2 230 VAC, 240 VAC
5 24 VDC, 24 VAC
6 12 VDC
15 48 VAC
Series
VX21/22/23
Glossary of Terms
Others
Pressure Terminology
1. Maximum operating pressure differential
The maximum pressure differential (the difference between
the inlet and outlet pressure) which is allowed for operation.
When the outlet pressure is 0 MPa, this becomes the
maximum operating pressure.
1. Material
NBR: Nitrile rubber
FKM: Fluoro rubber – Trade names: Viton®, Dai-el®, etc.
2. Oil-free treatment
The degreasing and washing of wetted parts
2. Minimum operating pressure differential
The minimum pressure differential (the difference between the
inlet pressure and outlet pressure) required to keep the main
valve fully opened.
3. Passage symbol
In the JIS symbol (
) IN and OUT are in a blocked condition( ), but actually in the case of reverse pressure (OUT>IN),
there is a limit to the blocking.
3. Maximum system pressure
The maximum pressure that can be applied inside the
pipelines (line pressure).
[The pressure differential in the solenoid valve portion must be
less than the maximum operating pressure differential.]
4. Withstand pressure
The pressure in which the valve must be withstood without a
drop in performance after holding for one minute under
prescribed (static) pressure and returning to the operating
pressure range. [value under the prescribed conditions]
Faston Terminal
1.
FastonTM
is a trademark of Tyco Electronics Corp.
2. For electrical connection of the Faston terminal and
molded coil, please use Tyco’s “Amp/Faston
connector/250 Series” or the equivalent.
Electrical Terminology
1. Surge voltage
A high voltage which is momentarily generated by shutting off
the power in the shut-off area.
2. Enclosure
A degree of protection defined in the “JIS C 0920: Waterproof
test of electric machinery/appliance and the degree of protection against the intrusion of solid foreign objects.”
Verify the degree of protection for each product.
IP
Second characteristic numeral
First characteristic numeral
First Characteristics:
Degrees of protection against solid foreign objects
0 Non-protected
1 Protected against solid foreign objects of 50 mmø and greater
2 Protected against solid foreign objects of 12 mmø and greater
3 Protected against solid foreign objects of 2.5 mmø and greater
4 Protected against solid foreign objects of 1.0 mmø and greater
5 Dust-protected
6 Dust-tight
Second Characteristics:
Degrees of protection against water
0 Non-protected
1 Protected against vertically falling water drops
2 Protected against vertically falling water drops when enclosure tilted up to 15°
3 Protected against rainfall when enclosure tilted up to 60°
4 Protected against splashing water
5 Protected against water jets
6 Protected against powerful water jets
7 Protected against the effects of temporary immersion in water
8 Protected against the effects of continuous immersion in water
—
Dripproof type 1
Dripproof type 2
Rainproof type
Splashproof type
Water-jet-proof type
Powerful water-jet-proof type
Immersible type
Submersible type
Example) IP65: Dust-tight, Water-jet-proof type
“Water-jet-proof type” means that no water intrudes inside
an equipment that could hinder from operating normally by
means of applying water for 3 minutes in the prescribed
manner. Take appropriate protection measures, since a
device is not usable in an environment where a droplet of
water is splashed constantly.
31
Series
VX21/22/23
Solenoid Valve Flow-rate Characteristics 1
(How to indicate flow-rate characteristics)
1. Indication of flow-rate characteristics
The flow-rate characteristics in equipment such as a solenoid valve, etc. are indicated in their specifications as
shown in Table (1).
Table (1) Indication of Flow-rate Characteristics
Corresponding
equipment
Other
Indication by
international standard indications
Pneumatic
equipment
Process fluid
control
equipment
Conformed standard
C, b
—
ISO 6358: 1989
JIS B 8390: 2000
—
S
JIS B 8390: 2000
Equipment: JIS B 8373, 8374, 8375, 8379, 8381
Cv
ANSI/(NFPA)T3.21.3: 1990
Av
—
—
Cv
IEC60534-2-3: 1997
JIS B 2005: 1995
Equipment: JIS B 8471, 8472, 8473
2. Pneumatic equipment
2.1 Indication according to the international standards
(1) Conformed standard
ISO 6358: 1989
: Pneumatic fluid power—Components using compressible fluids—
Determination of flow-rate characteristics
JIS B 8390: 2000 : Pneumatic fluid power—Components using compressible fluids—
How to test flow-rate characteristics
(2) Definition of flow-rate characteristics
The flow-rate characteri stics are indicated as a result of a comparison between sonic conductance C and
critical pressure ratio b .
Sonic conductance C : Value which divides the passing mass flow rate of an equipment in a choked flow
condition by the product of the upstream absolute pressure and the density in a
standard condition.
Critical pressure ratio b : Pressure ratio (downstream pressure/upstream pressure) which will turn to a choked
flow when the value is smaller than this ratio.
Choked flow
: The flow in which the upstream pressure is higher than the downstream pressure and
where sonic speed in a certain part of an equipment is reached.
Gaseous mass flow rate is in proportion to the upstream pressure and not dependent
on the downstream pressure.
Subsonic flow
: Flow greater than the critical pressure ratio
Standard condition
: Air in a temperature state of 20°C, absolute pressure 0.1 MPa (= 100 kPa = 1 bar),
relative humidity 65%.
It is stipulated by adding the “(ANR)” after the unit depicting air volume.
(standard reference atmosphere)
Conformed standard: ISO 8778: 1990 Pneumatic fluid power—Standard reference
atmosphere, JIS B 8393: 2000: Pneumatic fluid power—Standard reference atmosphere
(3) Formula for flow rate
Described by the practical units as following.
P2 + 0.1
≤ b , choked flow
P1 + 0.1
293
……………………………………………(1)
Q = 600 x C (P1 + 0.1)
273 + t
P2 + 0.1
When
> b , subsonic flow
P1 + 0.1
2
P2 + 0.1 − b
293 …………………(2)
Q = 600 x C (P1 + 0.1) 1 − P1 + 0.1
1−b
273 + t
When
Q: Air flow rate [dm3/min (ANR)], dm3 (Cubic decimeter) of SI unit are allowed to be described by L (liter).
1 dm3 = 1 L
32
Solenoid Valve Flow-rate Characteristics
Series VX21/22/23
C : Sonic conductance [dm3/(s·bar)]
b : Critical pressure ratio [—]
P1 : Upstream pressure [MPa]
P2 : Downstream pressure [MPa]
t : Temperature [°C]
Note) Formula of subsonic flow is the elliptic analogous curve.
Flow-rate characteristics are shown in Graph (1) For details, please make use of SMC’s “Energy Saving Program”.
Example)
Obtain the air flow rate for P1 = 0.4 [MPa], P2 = 0.3 [MPa], t = 20 [°C] when a solenoid valve is performed in
C = 2 [dm3/(s·bar)] and b = 0.3.
According to formula (1), the maximum flow rate = 600 x 2 x (0.4 + 0.1) x
293
= 600 [dm3/min (ANR)]
273 + 20
0.3 + 0.1
= 0.8
0.4 + 0.1
Based on Graph (1), the flow rate ratio will be 0.7 when the pressure ratio is 0.8 and b = 0.3.
Therefore, flow rate = Maximum flow rate x flow rate ratio = 600 x 0.7 = 420 [dm3/min(ANR)]
Flow rate ratio
Pressure ratio =
1
0.5
0.9
0.6
b = 0.1
0.8
0.2
0.7
0.3
0.6
0.4
0.5
0.4
0.3
P1 Equipment P2
0.2
C, b
Q
0.1
0
0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1
Pressure ratio (P2 + 0.1) / (P1 + 0.1)
Graph (1) Flow-rate characteristics
(4) Test method
Attach a test equipment with the test circuit shown in Fig. (1) while maintaining the upstream pressure to a
certain level which does not go below 0.3 MPa. Next, measure the maximum flow to be saturated in the first
place, then measure this flow rate at 80%, 60%, 40%, 20% and the upstream and downstream pressure. And
then, obtain the sonic conductance C from this maximum flow rate. Besides that, substitute each data of
others for the subsonic flow formula to find b, then obtain the critical pressure ratio b from that average.
Pressure gauge or
pressure convertor
Air
supply
Filter
Shut off
valve
ød3 ≥ 3d1
≥ 10d3
3d3
10d1
Pipe for measuring
temperature
Pipe for
measuring
pressure in the
upstream side
ød2
Pressure control
equipment
Differential pressure gauge or
differential pressure converter
ø d1
Thermometer
3d1
10d2
Flow control
valve
3d2
Flow meter
Equipment
for test
Pipe for
measuring
pressure in the
downstream side
Fig. (1) Test circuit based on ISO 6358, JIS B 8390
33
Series
VX21/22/23
Solenoid Valve Flow-rate Characteristics 2
(How to indicate flow-rate characteristics)
2.2 Effective area S
(1) Conformed standard
JIS B 8390: 2000: Pneumatic fluid power—Components using compressible fluids—
How to test flow-rate characteristics
Equipment standards: JIS B 8373: 2 port solenoid valve for pneumatics
JIS B 8374: 3 port solenoid valve for pneumatics
JIS B 8375: 4 port, 5 port solenoid valve for pneumatics
JIS B 8379: Silencer for pneumatics
JIS B 8381: Fittings of flexible joint for pneumatics
(2) Definition of flow-rate characteristics
Effective area S: The cross-sectional area having an ideal throttle without friction or without reduced flow. It is
deduced from the calculation of the pressure changes inside an air tank when discharging
the compressed air in a choked flow, from an equipment attached to the air tank. This is the
same concept representing the “easy to run through” as sonic conductance C.
(3) Formula for flow rate
When
P2 + 0.1
≤ 0.5, choked flow
P1 + 0.1
Q = 120 x S (P1 + 0.1)
293
273 + t
...............................................................(3)
P2 + 0.1 > 0.5, subsonic flow
P1 + 0.1
Q = 240 x S (P2 + 0.1) (P1 - P2)
When
293
............................................(4)
273 + t
Conversion with sonic conductance C:
S = 5.0 x C ....................................................................................................(5)
Q : Air flow rate [dm3/min(ANR)], dm3 (cubic decimeter) of SI unit are allowed to be described by L (liter).
1 dm3 = 1 L
S : Effective area [mm2]
P1 : Upstream pressure [MPa]
P2 : Downstream pressure [MPa]
t : Temperature [°C]
Note) Formula for subsonic flow (4) is only applicable when the critical pressure ratio b is unknown for
equipment. In the formula (2) by the sonic conductance C, it is the same formula as when b = 0.5.
(4) Test method
Attach a test equipment with the test circuit shown in Fig. (2) in order to discharge air into the atmosphere until
the pressure inside the air tank goes down to 0.25 MPa (0.2 MPa) from an air tank filled with the compressed
air at a certain pressure level (0.5 MPa) which does not go below 0.6 MPa. At this time, measure the
discharging time and the residual pressure inside the air tank which had been left until it turned to be the
normal values to determine the effective area S, using the following formula. The volume of an air tank should
be selected within the specified range by corresponding to the effective area of an equipment for test. In the
case of JIS B 8373, 8374, 8375, 8379, 8381, the pressure values are in parentheses and the coefficient of the
formula is 12.9.
Power
T
Thermometer
Pressure control
equipment
S : Effective area
V : Air tank capacity [dm3]
Air
Filter
supply
t : Discharging time [s]
Ps : Pressure inside air tank before discharging [MPa]
P : Residual pressure inside air tank after discharging [MPa]
T : Temperature inside air tank before discharging [K]
[mm2]
Control
circuit
Air tank
Shut off
valve
Pressure gauge
or pressure
convertor
Timer (Clock)
Pressure recorder
supply
Solenoid
valve
Equipment
for test
Fig. (2) Test circuit based on JIS B 8390
34
Rectifier tube on the
downstream side
)
Pressure switch
293 ..............
(6)
Rectifier tube on the
upstream side
(
S = 12.1 V log10 PS + 0.1
t
P + 0.1
Solenoid Valve Flow-rate Characteristics
Series VX21/22/23
2.3 Flow coefficient Cv factor
The United States Standard ANSI/(NFPA)T3.21.3: 1990: Pneumatic fluid power—Flow rating test
procedure and reporting method-For fixed orifice components
Defines the flow coefficient, Cv factor by the following formula which is based on the test conducted by the
test circuit analogous to ISO 6358.
Cv =
114.5
Q
…………………………………………………(7)
P (P2 + Pa)
T1
P
P1
P2
Q
Pa
T1
: Pressure drop between the static pressure tapping ports [bar]
: Pressure of the upstream tapping port [bar gauge]
: Pressure of the downstream tapping port [bar gauge]: P2 = P1 – P
: Flow rate [dm3/s standard condition]
: Atmospheric pressure [bar absolute]
: Upstream absolute temperature [K]
Test conditions are P1 + Pa = 6.5 0.2 bar absolute, T1 = 297 5 K, 0.07 bar
P 0.14 bar.
This is the same concept as effective area A which ISO 6358 stipulates as being applicable only when the
pressure drop is smaller than the upstream pressure and the compression of air does not become a problem.
3. Process fluid control equipment
(1) Conformed standard
IEC60534-2-3: 1997: Industrial-process control valves. Part 2: Flow capacity, Section Three-Test procedures
JIS B 2005: 1995: How to test flow coefficient of a valve
Equipment standards: JIS B 8471: Solenoid valve for water
JIS B 8472: Solenoid valve for steam
JIS B 8473: Solenoid valve for fuel oil
(2) Definition of flow-rate characteristics
Av factor: Value of the clean water flow rate represented by m3/s which runs through a valve (equipment for
test) when the pressure differential is 1 Pa. It is calculated using the following formula.
ρ ………………………………………………………………….
Av = Q
(8)
P
Av : Flow coefficient [m2]
Q : Flow rate [m3/s]
P : Pressure differential [Pa]
ρ
: Fluid density [kg/m3]
(3) Formula for flow rate
Described by the practical units. Also, the flow-rate characteristics are shown in Graph (2).
In the case of liquid:
Q = 1.9 x 106 Av
P ……………….………………………………………
(9)
G
Q : Flow rate [L/min]
Av : Flow coefficient [m2]
P : Pressure differential [MPa]
G : Specific gravity [water = 1]
In the case of saturated steam:
Q = 8.3 x 106 Av P (P2 + 0.1) ……………………………….…………(10)
Q : Flow rate [kg/h]
Av : Flow coefficient [m2]
P : Pressure differential [MPa]
P1 : Upstream pressure [MPa]: P = P1 − P2
P2 : Downstream pressure [MPa]
35
Series
VX21/22/23
Solenoid Valve Flow-rate Characteristics 3
(How to indicate flow-rate characteristics)
Conversion of flow coefficient:
Av = 28 x 10−6 Kv = 24 x 10−6 Cv ……………………………………………(11)
Here,
Kv factor
3
3
2
Upstream pressure
2
P1 = 1 MPa
P1 = 0.8 MPa
1
0.9
0.8 Example 2 P1 = 0.6 MPa
0.7
0.6 P1 = 0.5 MPa
0.5
0.4
P1 = 0.4MPa
P1 = 0.3 MPa
0.3
1
0.9
0.8
0.7
0.6
0.5
0.4
Example 1
0.3
P1 = 0.2 MPa
0.2
0.2
P1 = 0.1 MPa
0.1
0.001
0.1
0.002 0.003 0.004
0.01
Pressure differential
0.02 0.03 0.04
Water flow rate Q0 [L/min] when Av = 1 x 10−6 [m2])
Saturated steam flow rate Q0 [kg/h] (when Av = 1 x 10−6 [m2])
: Value of the clean water flow rate represented by m3/h which runs through a
valve at 5 to 40 C, when the pressure differential is 1 bar.
Cv factor (Reference values): Value of the clean water flow rate represented by US gal/min which runs
through a valve at 60 F, when the pressure differential is 1 lbf/in2 (psi).
Value is different from Kv and Cv factors for pneumatic purpose due to different test method.
0.1
P [MPa]
Graph (2) Flow-rate characteristics
Example 1)
Obtain the pressure differential when water 15 [L/min] runs through a solenoid valve with an Av = 45 x 10−6 [m2].
Since Q0 = 15/45 = 0.33 [L/min], according to Graph (2), if reading P when Q0 is 0.33, it will be 0.031 [MPa].
Example 2)
Obtain the saturated steam flow rate when P1 = 0.8 [MPa], P = 0.008 [MPa] with a solenoid valve with an
Av = 1.5 x 10−6 [m2].
According to Graph (2), if reading Q0 when P1 is 0.8 and P is 0.008, it is 0.7 [kg/h]. Therefore, the flow rate
Q = 0.7 x 1.5 = 1.05 [kg/h].
(4) Test method
Attach a test equipment with the test circuit shown in Fig. (3). Next, pour water at 5 to 40 C, then measure the
flow rate with a pressure differential of 0.075 MPa. However, the pressure differential needs to be set with a
large enough difference so that the Reynolds number does not go below a range of 4 x 104.
By substituting the measurement results for formula (8) to figure out Av.
Test range
Thermometer
Pressure
tap
Restrictor
on the
upstream side
Flow
meter
2d
20d
Equipment
Pressure
for test
tap
Restrictor on the
downstream side
6d
10d
Fig. (3) Test circuit based on IEC60534-2-3, JIS B 2005
36
Series
VX21/22/23
Flow-rate Characteristics 1
Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 32 through to 35.
Downstream pressure of valve (P2) [MPa]
For Air
Upst
1.0
ream
pres
sure
0.8
of va
lve P
1
1.0 M
Pa
Subsonic
0.9
0.6
cal
Critissure
e
pr
Sonic
0.8
0.7
0.4
0.6
0.5
0.4
0.2
0.3
0.2
0.1
0
50
100
100
150
200
200
300
400
400
300
400
500
600
200
350
250
800
600
350
ø2
400
ø3
1,000
1,000
ø4
1,200
ø5
1,400
ø7
700
700
1,000
ø8
1,300
ø10 (Connection: 1/4)
500 700
ø10 (Connection: 3/8, 1/2)
700 1,000
Flow rate Q [L/min (ANR)]
How to read the graph
The sonic range pressure to generate a flow rate of 400 L/min (ANR) is P1
0.2 MPa for a ø4 orifice and P1
0.58 MPa for a ø3 orifice.
For Water
30
20
ø10
ø8
ø4,
ø5
ø3
ø2
10
Flow rate Q [L/min]
ø7
5
4
3
2
1
0.1
0.001 (0.0018)
(0.0054)
0.01
(0.013)
Pressure differential
0.05 (0.07)
P = (P1 − P2) [MPa]
How to read the graph
When a water flow of 2 L/min is generated, P
0.013 MPa for a valve with ø3 orifice.
37
Series
VX21/22/23
Flow-rate Characteristics 2
Note) Use this graph as a guide. In the case of obtaining an accurate flow rate, refer to pages 32 through to 35.
Downstream pressure of valve (P2) [MPa]
For Saturated Steam
1.0
(664) (183)
Upst
ream
(663) (179)
0.8
pres
sure
(662) (174)
of va
lve P
1
1.0 M
Pa
(661) (170)
0.6
0.8
(658) (158)
0.4
0.7
cal
Criti sure
s
e
r
p
Sonic
0.6
(656) (151)
0.5
(654) (143)
0.2
Subsonic
0.9
(660) (164)
0.4
(650) (133)
0.3
0.2
(646) (120)
0.1
0
5
10
10
10
15
20
20
20
15
20
30
30
25
30
40
40
20
50
35
30
45
35
50
How to read the graph
40
50
60
45
ø3
ø4
60
70
ø2
80
ø5
ø7
30
40
25
ø8
60
ø10 (Connection: 1/4)
ø10 (Connection: 3/8, 1/2)
Flow rate Q [kg/h]
The sonic range pressure to generate a flow rate of 15 kg/h is P1 0.55 MPa for a ø2 orifice and P1 0.28 MPa for a ø3 orifice.
The amount of potential heat varies somewhat based on the pressure P1. At 15 kg/h, there will be approximately 9700 kcal/h of heat.
38
VX21/22/23
Specific Product Precautions 1
Series
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
Design
Selection
Warning
1. Cannot be used as an emergency shutoff valve, etc.
The valves presented in this catalog 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.
2. Extended 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 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 an air filter close to the valve on the upstream side. A
filtration degree of 5 m 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 a mist separator on the upstream side of
valves.
If excessive carbon powder is generated by the compressor,
it may adhere to the inside of the valves and canse a
malfunction.
Refer to Best Pneumatics No.5 for details on compressed air
quality.
<Vacuum>
Please be aware that there is a range of pressure that can be
used.
Atmospheric pressure
Low Medium
High
Air pressure vacuum vacuum vacuum
Hydraulic pressure
Differential
pressure
Ultra high
vacuum
Extreme
high
vacuum
<Suction filtration, Vacuum bottle set, Suction cup>
Drying
Discharge/Plasma
Selection
Warning
1. Fluid
1) Type of fluid
Before using a fluid, check whether it is compatible with the
materials of each model by referring to the fluids listed in this
catalog. Use a fluid with a kinematic viscosity of 50 mm2/s or
less. If there is something you do not know, please contact
SMC.
2) Flammable oil, Gas
Check the specifications for leakage in the interior and/or
exterior area.
Neon tube/Fluorescent light
Vapor
deposition
Torr
(mmHg)
<Accelerator, Electron microscope>
102 10
Surface
physics
Charged
particle beam
1 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12
Pa 109 108 107 106 105 104 103 102 101 1 10-1 10-2 10-3 10-4 10-5 10-6 10-7 10-8 10-9 10-10 10-11 10-12
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 material is picked up.
Please replace the valve after operating the device
approximately 300,000 times.
3) Corrosive gas
Cannot be used since it will lead to cracks by stress corrosion
or result in other incidents.
4) Depending on water quality, a brass body can cause
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.
39
VX21/22/23
Specific Product Precautions 2
Series
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
<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 80 to 100 mesh.
The supply water includes materials that create a hard
sediment or sludge such as calcium and magnesium.
Sediment and sludge can cause the valve to not operate
properly. Therefore, install a water softening device, which
removes these materials, and a filter (strainer) directly in front
of the valve.
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 dezincificationresistant 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. The kinematic viscosity
must not exceed 50 mm2/s
<Steam>
The use of a steam 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 standard, the mesh count for the strainer is 100 mesh.
However, the size and shape of foreign objects that occur
depends on the operating environment. Check the fluid
status and choose an appropriate mesh count.
The supply water to a boiler includes materials that create a
hard sediment or sludge such as calcium and magnesium.
Sediment and sludge from steam can cause the valve to not
operate properly. Install a water softening device, which
removes these materials. Do not use operation steam which
contains chemicals, synthetic oils containing organic
solvents, salts or corrosive gases, etc., as these can cause
damage or deterioration.
3. 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.
4. Countermeasures against static electricity
Take measures to prevent static electricity since some fluids
can cause static electricity.
Warning
5. Low temperature operation
1) The valve can be used in an ambient temperature of between
–20 to –10°C. However, take measures to prevent freezing or
solidification of impurities, etc.
2) When using valves for water application in cold climates, take
appropriate countermeasures to prevent the water from
freezing in tubing after cutting the water supply from the
pump, by draining the water, etc. When warming by a heater,
etc., be careful not to expose the coil portion to a heater.
Installation of a dryer, heat retaining of the body is recommended to prevent a freezing condition in which the dew
point temperature is high and the ambient temperature is low,
and the high flow runs.
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.
Switching element
OFF
Power supply
Warning
Selection
C
Leakage voltage
R
SOL.
Leakage current
AC/Class B built-in full-wave rectifier coil: 10% or less of
rated voltage
DC coil: 2% or less of rated voltage
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 mm2/s.
Mounting
Warning
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. Especially for strict leakage control, such as
with vacuum applications and non-leak specifications, the coil
must be positioned upward.
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.
40
VX21/22/23
Specific Product Precautions 3
Series
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
Recommended Piping Conditions
Mounting
Warning
5. Secure with brackets, except in the case of steel
piping and copper fittings.
6. Avoid sources of vibration, or adjust the arm from
the body to the minimum length so that resonance
will not occur.
1. When connecting tubes using one-touch fittings,
provide some spare tube length shown in Fig. 1,
recommended piping configuration.
Also, do not apply external force to the fittings when binding
tubes with bands, etc. (see Fig. 2.)
7. Painting and coating
Warnings or specifications printed or labeled on the product
should not be erased, removed or covered up.
Straight
portion
Mounting
pitch A
Piping
Fig. 1 Recommended piping configuration
Warning
1. During use, deterioration of the tube or damage to
the fittings could cause tubes to come loose from
their fittings and thrash about.
To prevent uncontrolled tube movement, install protective
covers or fasten tubes securely in place.
2. For piping the tube, fix the product securely using
the mounting holes so that the product is not in the
air.
Unit: mm
Tube
size
ø1/8"
ø6
ø1/4"
ø8
ø10
ø12
Mounting pitch A
Straight
Nylon tube Soft nylon tube Polyurethane tube portion length
44 or more
29 or more
25 or more
16 or more
84 or more
39 or more
39 or more
30 or more
89 or more
56 or more
57 or more
32 or more
112 or more
58 or more
52 or more
40 or more
140 or more
70 or more
69 or more
50 or more
168 or more
82 or more
88 or more
60 or more
Caution
1. Preparation before piping
Before piping is connected, it should be thoroughly blown out
with air (flushing) or washed to remove chips, cutting oil and
other debris from inside the pipe.
Install piping so that it does not apply pulling, pressing, bending
or other forces on the valve body.
2. Avoid connecting ground lines to piping, as this may
cause electric corrosion of the system.
3. Tighten threads with the proper tightening torque.
Recommended
Fig. 2 Binding tubes with bands
When attaching fittings to valves, tighten with the proper
tightening torque shown below.
Tightening Torque for Piping
Connection thread Proper tightening torque (N·m)
Rc1/8
7 to 9
Rc1/4
12 to 14
Rc3/8
22 to 24
Rc1/2
28 to 30
4. Connection of piping to products
Unacceptable
Wiring
Caution
1. As a rule, use electrical wire with a cross sectional
area of 0.5 to 1.25 mm2 for wiring.
Furthermore, do not allow excessive force to be
applied to the lines.
When connecting piping to a product, refer to its operation
manual to avoid mistakes regarding the supply port, etc.
2. Use electrical circuits which do not generate
chattering in their contacts.
5. In applications such as vacuum and non-leak
specifications, use caution specifically against the
contamination of foreign objects or airtightness of
the fittings.
3. Use voltage which is within ±10% of the rated
voltage. In cases with a DC power supply where
importance is placed on responsiveness, stay within
±5% of the rated value. The voltage drop is the value
in the lead wire section connecting the coil.
4. When a surge from the solenoid affects the electrical
circuitry, install a surge voltage suppressor, etc., in
parallel with the solenoid. Or, adopt an option that
comes with the surge voltage protection circuit.
(However, a surge voltage occurs even if the surge
voltage protection circuit is used. For details, please
consult with SMC.)
41
VX21/22/23
Specific Product Precautions 4
Series
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
Operating Environment
Warning
Electrical Connections
Caution
Warning
1. Removing the product
The valve will reach a high temperature when used with high
temperature fluids. Confirm that the valve temperature has
dropped sufficiently before performing work. If touched inadvertently, there is a danger of being burned.
q
w
Lead wire color
q
w
Black
Red
Blue
Blue
Red
Red
Gray
Gray
Rated voltage
DC (Class B only)
100 VAC
200 VAC
Other AC
∗ There is no polarity.
DIN terminal (Class B only)
Since internal connections are shown below for the DIN
terminal, make connections to the power supply accordingly.
1: +
(−)
1
1) Shut off the fluid supply and release the fluid pressure in
the system.
2) Shut off the power supply.
3) Remove the product.
Class H coil: AWG18 Outside insulator diameter of 2.1 mm
+
Maintenance
Grommet
Class B coil: AWG20 Outside insulator diameter of 2.5 mm
2
2. Low frequency operation
3
1. Do not use in an atmosphere having corrosive
gases, chemicals, sea water, water, water vapor, or
where there is direct contact with any of these.
2. Do not use in explosive atmospheres.
3. Do not use in locations subject to vibration or
impact.
4. Do not use in locations where radiated heat will be
received from nearby heat sources.
5. Employ suitable protective measures in locations
where there is contact with water droplets, oil or
welding spatter, etc.
—
Switch valves at least once every 30 days to prevent malfunction. Also, in order to use it under the optimum state, conduct a
regular inspection once a half year.
2: −
(+)
Caution
1. Filters and strainers
1) Be careful regarding clogging of filters and strainers.
2) Replace filter elements after one year of use, or earlier if
the pressure drop reaches 0.1 MPa.
3) Clean strainers when the pressure drop reaches 0.1 MPa.
Terminal no.
DIN terminal
2
− (+)
∗ There is no polarity.
• Use a heavy-duty cord with an outside cable diameter of ø6 to 12 mm.
• Use the tightening torques below for each section.
2. Lubrication
When using after lubricating, never forget to lubricate continuously.
1
+ (−)
Connector
Binding head screw with flange
Tightening torque of 0.5 to 0.6 N·m
3. Storage
In case of long term storage after use with heated water,
thoroughly remove all moisture to prevent rust and deterioration
of rubber materials, etc.
4. Exhaust the drainage from an air filter periodically.
Operating Precautions
Warning
1. If there is a possibility of reverse pressure being
applied to the valve, take countermeasures such as
mounting a check valve on the downstream side of
the valve.
2. When problems are caused by a water hammer,
install water hammer relief equipment (accumulator,
etc.), or use an SMC water hammer relief valve
(Series VXR). For details, please consult with SMC.
42
Gasket
Washer
Compatible cable Note)
(Outside cable diameter of
ø6 to 12 mm)
Rubber seal
Binding head screw
Tightening torque of 0.5 to 0.6 N·m
Note) For an outside cable diameter of ø9 to 12 mm, remove the internal
parts of the rubber seal before using.
VX21/22/23
Specific Product Precautions 5
Series
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
Electrical Circuits
Electrical Connections
Caution
Caution
Conduit terminal
[DC circuit]
In the case of the conduit terminal, make connections according to the marks shown below.
• Use the tightening torques below for each section.
• Properly seal the terminal connection (G1/2) with the special
wiring conduit, etc.
Grommet, Faston terminal
Terminal cover
Round head combination screw
M3 Tightening torque of
0.5 to 0.6 N·m
Grommet, DIN terminal,
Conduit terminal, Conduit
Varistor
1 (+, –)
1 (+, –)
SOL.
SOL.
2 (–, +)
2 (–, +)
Without electrical option
A
With surge voltage suppressor
2
-
1
+
Varistor
+ mark
– mark
DIN terminal, Conduit terminal
1 (+, –)
A
Round head
combination screw
M3 Tightening torque of
0.5 to 0.6 N·m
Conduit terminal
SOL.
G1/2
Tightening
torque of
0.5 to 0.6 N·m
View A-A
(Internal connection diagram)
2 (–, +)
Light
With light/surge voltage suppressor
[AC circuit]
Conduit
∗ For AC (Class B), the standard product is equipped with surge voltage
suppressor.
When used as an IP65 equivalent, use seal to install the wiring
conduit. Also, use the tightening torque below for the conduit.
Grommet, DIN terminal,
Conduit terminal, Conduit
Class B coil: AWG20 Outside insulator diameter of 2.5 mm
Class H coil: AWG18 Outside insulator diameter of 2.1 mm
Varistor Rectifier
element
1
Lead wire
2
Seal
Wiring conduit
(Connection G1/2 Tightening torque of 0.5 to 0.6 N·m)
Lead wire color
q
w
Black
Red
Blue
Blue
Red
Red
Gray
Gray
SOL.
2
Without electrical option
w
DC
100 VAC
200 VAC
Other AC
1
Varistor
Rectifier
element
SOL.
q
Rated voltage
DIN terminal, Conduit terminal
Light
With light/surge voltage suppressor
One-touch Fitting
Caution
For information on handling one-touch fittings and
appropriate tubing, refer to page 41 and the KQ2
series one-touch fittings in Best Pneumatics No. 6.
The KQ2 series information can be downloaded from
the following SMC website, http://www.smcworld.com
∗ There is no polarity.
Description
Seal
Part no.
VCW20-15-6
Note) Please order separately.
43
Safety Instructions
Caution:
These safety instructions are intended to prevent hazardous situations and/or
equipment damage. These instructions indicate the level of potential hazard with
the labels of “Caution,” “Warning” or “Danger.” They are all important notes for
safety and must be followed in addition to International Standards (ISO/IEC) 1),
and other safety regulations.
Caution indicates a hazard with a low level of risk
which, if not avoided, could result in minor or
moderate injury.
Warning:
Warning indicates a hazard with a medium level of
risk which, if not avoided, could result in death or
serious injury.
Danger :
Danger indicates a hazard with a high level of risk
1) ISO 4414: Pneumatic fluid power – General rules relating to systems.
ISO 4413: Hydraulic fluid power – General rules relating to systems.
IEC 60204-1: Safety of machinery – Electrical equipment of machines.
(Part 1: General requirements)
ISO 10218-1: Manipulating industrial robots – Safety.
etc.
which, if not avoided, will result in death or serious
injury.
Caution
Warning
1. The compatibility of the product is the responsibility of the
person who designs the equipment or decides its specifications.
Since the product specified here is used under various operating conditions, its
compatibility with specific equipment must be decided by the person who designs
the equipment or decides its specifications based on necessary analysis and test
results. The expected performance and safety assurance of the equipment will be
the responsibility of the person who has determined its compatibility with the
product. This person should also continuously review all specifications of the
product referring to its latest catalog information, with a view to giving due
consideration to any possibility of equipment failure when configuring the
equipment.
2. Only personnel with appropriate training should operate
machinery and equipment.
The product specified here may become unsafe if handled incorrectly. The
assembly, operation and maintenance of machines or equipment including our
products must be performed by an operator who is appropriately trained and
experienced.
3. Do not service or attempt to remove product and machinery/
equipment until safety is confirmed.
1. The inspection and maintenance of machinery/equipment should only be
performed after measures to prevent falling or runaway of the driven objects
have been confirmed.
2. When the product is to be removed, confirm that the safety measures as
mentioned above are implemented and the power from any appropriate source
is cut, and read and understand the specific product precautions of all relevant
products carefully.
3. Before machinery/equipment is restarted, take measures to prevent
unexpected operation and malfunction.
4. Contact SMC beforehand and take special consideration of safety
measures if the product is to be used in any of the following
conditions.
1. Conditions and environments outside of the given specifications, or use
outdoors or in a place exposed to direct sunlight.
2. Installation on equipment in conjunction with atomic energy, railways, air
navigation, space, shipping, vehicles, military, medical treatment, combustion
and recreation, or equipment in contact with food and beverages, emergency
stop circuits, clutch and brake circuits in press applications, safety equipment
or other applications unsuitable for the standard specifications described in the
product catalog.
3. An application which could have negative effects on people, property, or
animals requiring special safety analysis.
4. Use in an interlock circuit, which requires the provision of double interlock for
possible failure by using a mechanical protective function, and periodical
checks to confirm proper operation.
1. The product is provided for use in manufacturing industries.
The product herein described is basically provided for peaceful use in
manufacturing industries.
If considering using the product in other industries, consult SMC beforehand and
exchange specifications or a contract if necessary.
If anything is unclear, contact your nearest sales branch.
Limited warranty and Disclaimer/
Compliance Requirements
The product used is subject to the following “Limited warranty and Disclaimer”
and “Compliance Requirements”.
Read and accept them before using the product.
Limited warranty and Disclaimer
1. The warranty period of the product is 1 year in service or 1.5 years after
the product is delivered. 2)
Also, the product may have specified durability, running distance or
replacement parts. Please consult your nearest sales branch.
2. For any failure or damage reported within the warranty period which is clearly our
responsibility, a replacement product or necessary parts will be provided.
This limited warranty applies only to our product independently, and not to any
other damage incurred due to the failure of the product.
3. Prior to using SMC products, please read and understand the warranty terms
and disclaimers noted in the specified catalog for the particular products.
2) Vacuum pads are excluded from this 1 year warranty.
A vacuum pad is a consumable part, so it is warranted for a year after it is delivered.
Also, even within the warranty period, the wear of a product due to the use of the vacuum pad
or failure due to the deterioration of rubber material are not covered by the limited warranty.
Compliance Requirements
1. The use of SMC products with production equipment for the manufacture of
weapons of mass destruction (WMD) or any other weapon is strictly prohibited.
2. The exports of SMC products or technology from one country to another are
governed by the relevant security laws and regulations of the countries involved
in the transaction. Prior to the shipment of a SMC product to another country,
assure that all local rules governing that export are known and followed.
Revision history
Edition B
Added N.O. valve.
Added steam as a fluid (Insulation type Class H).
Added manifold.
Increased pages from 32 to 49.
QV
Safety Instructions Be sure to read “Handling Precautions for SMC Products” (M-E03-3) before using.
Akihabara UDX 15F,
4-14-1, Sotokanda, Chiyoda-ku, Tokyo 101-0021, JAPAN
Phone: 03-5207-8249 Fax: 03-5298-5362
http://www.smcworld.com
© 2012 SMC Corporation All Rights Reserved
Specifications are subject to change without prior notice
and any obligation on the part of the manufacturer.
D-DN
1st printing PR printing QV 8150SZ Printed in Japan.
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