VCS EU
Series VC
Direct Operated 2 Port Solenoid Valve for Steam
Series VCS
VX
VN
VQ
VDW
VC
LV
PA
4.5-51
Multipurpose Valve for Steam
Direct Operated 2 Port Solenoid Valve for Steam
Series VCS
Improved durability
(nearly twice the life of the previous series)
The internal resistance of moving parts has been reduced
through the use of a unique magnetic material.
Service life, durability and corrosion resistance have been
increased.
High flow rate:
Nl/min 157 to 2061
Smaller size:
Single valve volume reduced by 15% (Class 3)
Manifold length reduced by 18% (Class 3: 5 stations) (SMC comparison)
Clip type
Quick change coils
Clip design makes coil
replacement easy
Flame resistance
Conforms to UL94 V-0
Coil size and weight reduced
New compact coil reduces the overall
size and weight of the valve
Volume – 15%
Weight – 20%
SMC comparison
(Class 3)
Threaded assembly
Simplifies maintenance
Improved corrosion resistance
Improved corrosion resistance
Special material introduced
Bottom mounting threads
Mounting bracket also available
Enclosure: Dust-tight and splash proof
(equivalent to IP65)
Wiring specifications (Class H coil)
3 compact sizes available
Wiring variations
Conduit terminal
4.5-52
VCS2
VCS3
VCS4
Class 2
Class 3
Class 4
Direct Operated
2 Port Solenoid Valve for Steam
Series VC
Series
VCS
How to Order Valves (Single Type)
VC S 2 1
1 G
2
02
Q
For steam
Option
When no symbol is shown for
"Material and insulation type"
• Body material: Brass
• Seal material: PTFE
• Coil insulation: Class H
Nil
F
Material and insulation type
Symbol Body material Seal material Coil insulation
Nil
PTFE
Brass
D
FKM
Class H
R
PTFE
Stainless
steel
N
FKM
Series
2
3
4
None
Foot type bracket
Class 2
Class 3
Class 4
Valve type
N.C.
Thread type
OUT
(2)
Rc
NPT
G
Nil
N
F
1
(1)
IN
VX
1
2
3
4
36
9
Order
Made
VN
Port size
Voltage
100VAC
200VAC
110VAC
220VAC
230VAC
01
02
03
04
06
less than 250VAC
Contact SMC for other voltages (9)
Protective class
class III (Mark: )........ Grommet, L and M plug
connector
Electrical entry
T -With conduit terminal
TL-With conduit terminal/light
Port size
1/8 (6A)
1/4 (8A)
3/8 (10A)
1/2 (15A)
3/4 (20A)
Symbol
Class 3
—
—
Class 2
—
—
—
Class 4
—
VQ
VDW
VC
Orifice size
Symbol Orifice diameter
ø2mm
2
ø3mm
3
ø4mm
4
ø5mm
5
ø7mm
7
ø10mm
10
Class 2
—
—
Class 3
—
LV
Class 4
—
PA
∗ Refer to the table below for orifice and port size combinations.
Orifice and port size combinations
Orifice size
Class
Port size
Note 1)
ø2 ø3 ø4 ø5 ø7 ø10
2
3
4
1/8 ( 6A)
— —
1/4 ( 8A)
— —
1/4 ( 8A)
—
—
3/8 (10A)
—
1/2 (15A)
—
— — — —
1/4 ( 8A)
—
—
3/8 (10A)
—
1/2 (15A)
—
3/4 (20A)
—
— — — —
— — — —
Note 1) ø10 is available with seal material FKM only.
4.5-53
Series
VCS
Standard Specifications
Valve construction
Direct operated poppet
Fluid
Steam (184°C or less)
Valve specifications
Withstand pressure MPa
5.0
Body material
Brass, Stainless steel
Seal material
PTFE (FKM)
Ambient temperature °C
–20 to 100
Fluid temperature °C
184 or less (PTFE), 120 or less (FKM) Note 1)
Enclosure
Dust proof, Splash proof (equivalent to IP65)
Environment
Location without corrosive or explosive gases
Valve leakage cm³/ min
300 (PTFE), 0.1 (FKM) with air
Mounting orientation
Unrestricted
Vibration/Impact resistance m/s² Note 2)
Coil
Specifications
Rated voltage
30/150 or less
100VAC, 110VAC, 200VAC, 220VAC, 230VAC (50/60Hz)
±10% of rated voltage
Allowable voltage fluctuation
Coil insulation type
Class H
Power consumption W 50/60Hz
Apparent power VA
50/60Hz
VCS2: 4.9/4.1, VCS3: 7.7/6.6, VCS4: 10.5/9.3
Inrush
VCS2: 22/19, VCS3: 36/30, VCS4: 45/37
Holding
VCS2: 10/8, VCS3: 15/13, VCS4: 19/16
Note 1) In case of low pressure steam at a temperature of 120°C or less, use FKM for the seal material.
Note 2) Vibration resistance …Conditions when tested with one sweep of 10 to 300Hz in the axial direction and at a right
angle to the armature, in both energized and deenergized states
Impact resistance …... Conditions when tested with a drop tester in the axial direction and at a right angle to the
armature, one time each in energized and deenergized states
Characteristic Specifications
Note 1)
Note 1)
Model Class Port size
VCS2
VCS3
VCS4
2
3
4
1/8 (6A)
1/4 (8A)
1/4 (8A)
3/8 (10A)
1/2 (15A)
1/4 (8A)
3/8 (10A)
1/2 (15A)
3/4 (20A)
Orifice
size
mm
Maximum
operating
pressure
differential MPa
ø2
1.0
2.8 (157)
ø3
0.8
5.9 (324)
ø4
0.5
9.2 (500)
ø5
0.3
11.7 (638)
ø3
1.0
6.3 (344)
ø4
0.8
9.7 (530)
ø5
0.5
14.4 (785)
Effective area
mm²
(Nl/min)
ø7
0.2
24.8 (1354)
ø10
0.1
37.8 (2061)
ø3
1.0
6.3 (843)
ø4
1.0
10.8 (589)
ø5
0.7
15.3 (834)
ø7
0.3
24.8 (1354)
ø10
0.12
37.8 (2061)
Max. operating
pressure
MPa
Weight
kg
1.0 (10)
1/8: 0.21
1/4: 0.24
1.0 (10)
1/4: 0.42
3/8: 0.40
1/2: 0.49
1.0 (10)
1/4: 0.58
3/8: 0.55
1/2: 0.62
3/4: 0.78
Note 1) Refer to model selection on page 4.5-59 regarding port size and orifice size combinations.
4.5-54
Direct Operated
2 Port for Steam
Series
VCS
Construction
Parts list
1
2
3
4
5
6
7
Material
Description
No.
Standard
Stainless steel
Clip
Stainless steel, Cu
Tube assembly
Class H
Coil assembly
Stainless steel, PTFE (FKM)
Armature assembly
Seal
PTFE (FKM)
Return spring
Stainless steel
Brass
Body
VX
Dimensions/Bracket
VN
A
J
VQ
4-øG
C
1.5
VDW
LV
E
D
L
B
VC
PA
4-øH
Valve mounting hole
F
Bracket mounting dimensions
(mm)
Valve model
Port size
Bracket part no.
A
B
C
D
E
F
G
H
J
L
VCS21
1/8, 1/4
VCS20-12-01A
34
40
25
30
12.8
12.8
5
4.5
6
13
1/4, 3/8
VCS30-12-02A
42
52
30
40
19
19
6
5.5
7
19
1/2
VCS30-12-04A
48
56
36
44
23
23
6
5.5
7
23
1/4, 3/8
VCS40-12-02A
42
52
30
40
23
23
6
5.5
7
19
1/2
VCS30-12-04A
48
56
36
44
23
23
6
5.5
7
23
3/4
VCS40-12-06A
56
65
44
53
28.2
28.2
6
5.5
7
26
VCS31
VCS41
∗ Bracket material: Stainless steel
4.5-55
Series
VCS
Dimensions
Conduit terminal: T
L
2-M
K
(Q)
F
R
C
U
25
34
E
G (PF) 1/2
B
A
H
D
(S)
2-P
Port size
N.C.
(mm)
Electrical entry
Model
P
Port size
A
B
C
D
E
F
H
K
L
M
Conduit terminal: T
Q
VCS21
VCS31
VCS41
4.5-56
1/8
13.5
28
64
31
6.5
12.5
28
14
12.8
M4
8.5
99
R
S
U
50
66
83
86
1/4
18
36
67.5
31
12.5
28
18
12.8
M4
99
53
66
1/4, 3/8
22
40
81.5
36.5
11
15
32
20
19
M5
101
66.5
68
99
1/2
30
50
86
36.5
13.5
15
32
25
23
M5
101
71
68
104
1/4, 3/8
22
45
90
41
11
17
36
22.5
23
M5
103
74.5
70
107
1/2
30
50
94
41
13.5
17
36
25
23
M5
103
78.5
70
111.5
3/4
35
60
102
41
17.5
17
36
30
28.2
M5
103
86.5
70
119
Direct Operated
2 Port for Steam
VCS
Series
How to Order Manifolds
How to Order Manifold Assemblies (Example)
D 02 01
VV2C S 2
For steam
Thread type
Manifold material: Brass
Symbol
Nil
Series
2
3
4
Enter the valve and option models to be mounted
under the manifold base part number.
<Example>
VV2CS2-D0501 ……….1 set Manifold part no.
N
F
Class 2
Class 3
Class 4
Thread type
Rc
NPT
G
VCS23-1T-2-Q ……... 5 sets Valve part no.
(Stations 1 to 5)
Enter together in
order, counting
from station 1 on
the D side.
OUT port size
Material
Symbol
Stations
Symbol Body material Seal material
D
Brass
FKM
H
Stainless steel
FKM
02
:
10
01
02
2 stations
:
10 stations
Port size
1/8 (6A)
1/4 (8A)
n
U
e
sid
5
∗ All IN ports are 3/8.
4
3
∗ Refer to the L
dimensions on page
6 regarding the
maximum number of
stations.
2
ns
tio
Sta
D
1
e
sid
How to Order Valves (for Manifold)
VC S 2 3
1 T
Q
2
For steam
VX
Material and insulation type
• Body material: Brass
• Seal material: PTFE
• Coil insulation: Class H
Series
2
3
4
Class 2
Class 3
Class 4
VC
Symbol
Voltage
Order
Made
VDW
Orifice size
N.C. for manifold
1
2
3
4
36
9
VQ
Note) High corrosion resistant specification used for
armature material.
Valve type
3
VN
Symbol Body material Seal material Coil insulation
Nil
PTFE
Brass
D
FKM
Class H
R
PTFE
Stainless
steel
N
FKM
Electrical entry
T
TL
100VAC
200VAC
110VAC
220VAC
230VAC
Conduit terminal
With conduit terminal/light
2
3
4
5
7
Orifice size
ø2mm
ø3mm
ø4mm
ø5mm
ø7mm
Class 2
–
Class 3
–
Class 4
–
less than 250VAC
Contact SMC for other voltages (9)
Protective class
class III (Mark: )........ Grommet, L and M plug
connector
Manifold Options
Blanking plate assembly
VVCS 2 0
JIS symbol
3A
Series
2
3
4
Material and insulation type
Class 2
Class 3
Class 4
This is used by mounting it on the manifold
block when a valve is removed for
maintenance or when the mounting of an
additional valve is planned, etc.
Symbol Plate material Seal material
PTFE
NIl
Brass
FKM
D
PTFE
R
Stainless
steel
FKM
N
4.5-57
LV
PA
Series
VCS
Dimensions
D side
Stations
2
3
4
n
5
U side
P=J
∗
∗
N- 1/4
N- 1/8
: Thread type
(pitch)
∗
T
25
H
5.5
H
2
16
21
1
∗
∗: Thread type
(X)
IN port 2- 3/8
E
(N)
2.5
SMC
SMC
SMC
B
C
C
A
D
G
SMC
L1
L2
L3
(Y)
Z
16
L dimensions
Model
(mm)
n (stations)
Dimensions
VV2CS2
VV2CS3
VV2CS4
2
3
4
5
6
7
8
9
10
L1
69
103.5
138
172.5
207
241.5
276
310.5
345
L2
81
115.5
150
184.5
219
253.5
288
322.5
357
L3
93
127.5
162
196.5
231
265.5
300
334.5
369
L1
77
115.5
154
192.5
231
269.5
308
346.5
385
L2
89
127.5
166
204.5
243
281.5
320
358.5
397
L3
101
139.5
178
216.5
255
293.5
332
370.5
409
L1
83
124.5
166
207.5
249
290.5
332
373.5
415
L2
95
136.5
178
219.5
261
302.5
344
385.5
427
L3
107
148.5
190
231.5
273
314.5
356
397.5
439
2 stns. x 1
3 stns. x 1
2 stns. x 2
2 stns. + 3 stns.
3 stns. x 2
3 stns. x 3
2 stns. x 2 + 3 stns. x 2
Manifold composition
2 stns. x 2 + 3 stns. 2 stns. + 3 stns. x 2
Note) Manifold bases are composed by connecting 2 station and 3 station bases.
Dimensions
(mm)
Electrical entry
Model
A
B
C
D
E
G
H
J
Z
Grommet: G
Q
R
Conduit: C
S
Conduit terminal: T
T
N
X
41.5
66
99
Y
VV2CS2
49
20
24.5
28
4.5
38
17.3
34.5
56
22
50.5
44
VV2CS3
57
25.5
28.5
30
5.5
42
19.3
38.5
66
24
60
45.5
51
68
101
86.5
VV2CS4
57
25.5
28.5
30
5.5
42
20.8
41.5
74
26
68
47.5
58.5
70
103
94
4.5-58
77
Series VCS
Model Selection
VCS (for steam) 2 port solenoid valve
Material
Model
Body
Class
2
VCS
(for steam)
2 port
solenoid
valve
PTFE
(FKM)
Brass
(stainless
steel)
3
4
Orifice size
Port size
Seal
Note 1)
ø2
ø3
ø4
ø5
ø7
ø10
1/8 ( 6A)
–
–
1/4 ( 8A)
–
–
1/4 ( 8A)
–
–
3/8 (10A)
–
1/2 (15A)
–
–
–
–
–
1/4 ( 8A)
–
–
3/8 (10A)
–
1/2 (15A)
–
–
–
–
–
3/4 (20A)
–
–
–
–
–
Note 1) ø10 is available with seal meterial FKM only.
For saturated steam
Downstream pressure of valve (P2) MPa
1.0
0.9
[664] (183)
[664] (179)
Upstr
eam
press
ure o
f valv
e P1
0.95
0.9
0.85
[661] (170)
0.8
0.7
0.7
5
[660] (164)
0.7
0.6
0.6
5
[658] (153)
0.6
0.5
0.5
5
0.5
[656] (151)
0.4
0.4
5
0.4
[654] (143)
0.3
5
0.3
0.3
[650] (133)
0.2
0.2
0. 5
0.1 2
[646] (120)
5
0.
0.1
0.0 1
5
0.8
VCS21ø2
VCS21ø3
VCS21ø4
VCS21ø5
3
VCS 41ø3
VCS31ø4
VCS31ø5
VCS41ø4
VCS41ø5
3
VCS 41ø7
[662] (174)
5
10
10
15
20
25
15
20 25
30
15
20 25
10
20
20
30
40
20
30
40
30
20
40
50
60
20
30
40
30 40 50
Viewing the graph
The sonic range pressure to generate a flow rate of
25kg/h
for orifice ø3 (VCS21) is P1 approx. 0.68MPa
for orifice ø4 (VCS21) is P1 approx. 0.40MPa
for orifice ø5 (VCS21) is P1 approx. 0.29MPa
= 1.0
MPa
ic
son
Sub
ical
Crit sure
pres
ic
Son
15
30
50
60
S = 2.8mm²
S = 5.9mm²
S = 9.2mm²
S = 11.7mm²
S = 6.3mm²
S = 9.7mm²
S = 14.4mm²
S = 10.8mm²
S = 15.3mm²
S = 24.8mm²
The holding heat differs somewhat depending
on the pressure P1, but at 25kg/h it is
approximately 16000kcal/h.
How to find
the flow rate for saturated steam
1. For subsonic range
Where P1 + 0.1013 = (1 to 2) (P2 + 0.1013)
• Formula based on Cv factor
Q = 197.8⋅Cv⋅ ∆P (P2 + 0.1013) … kg/h
• Formula based on effective area
Q = 11.0⋅S⋅ ∆P (P2 + 0.1013) … kg/h
2. For sonic range
Where P1 = 0.1013≥2 (P2 + 0.1013)
• Formula based on Cv factor
Q = 98.9⋅Cv⋅ (P1 + 0.1013) … kg/h
• Formula based on effective area
Q = 5.5⋅S⋅ (P1 + 0.1013) … kg/h
Flow rate Q kg/h
Figures inside [ ] indicate the saturated steam holding heat (kcal/kg).
Figures inside ( ) indicate the saturation temperature (°C).
4.5-59
VX
VN
VQ
VDW
VC
LV
PA
Series
VCS
Explanation of Terminology
Pressure Terminology
1. Maximum operating pressure differential
This indicates the maximum pressure differential (upstream
and downstream pressure differential) which can be allowed
for operation with the valve closed or open. When the
downstream pressure is 0MPa, this becomes the maximum
operating pressure.
2. Maximum operating pressure
This indicates the limit of pressure that can be applied inside
the pipelines. (line pressure)
(The pressure differential of the solenoid valve unit must be no
more than the maximum operating pressure differential.)
3. Withstand pressure
The pressure which must be withstood without a drop in
performance after returning to the operating pressure range.
(the value under the prescribed conditions)
Electrical Terminology
1. Surge voltage
A high voltage which is momentarily generated in the shut-off unit
by shutting off the power.
Other
1. Materials
PTFE: Tetrafluoroethylene resin – Trade names: Teflon®,
Polyflon®, etc.
FKM: Fluoro rubber – Trade names: Viton®, Dai-el®, etc.
4.5-60
Series
VCS
2 Port Solenoid Valve for Fluid Control
Be sure to read before handling.
Operating Environment
Wiring
Warning
Caution
1. As a rule, use electrical wire of 0.5 to
1.25mm² for wiring.
Furthermore, do not allow excessive force to
be applied to the lines.
2. Use electrical circuits which do not generate
chattering in their contacts.
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 surge from the solenoid affects the
electrical circuitry, install a surge absorber,
etc., in parallel with the solenoid.
Electrical Connections
Maintenance
Warning
1. Perform maintenance in accordance with the
procedures in the instruction manual.
Improper handling can cause damage or malfunction of
machinery and equipment, etc.
In addition, perform maintenance inspections once every six
months to ensure optimum performance.
Caution
Conduit terminal
2. Removing the product
In the case of the conduit terminal, make connections according to
the marks shown below.
Terminal cover
Round head
combination screw
M3
A
– mark
2
-
1
+
+ mark
Round head
combination screw
A
M3
View A-A
(Internal connection diagram)
Conduit terminal
∗ There is polarity only when equipped with light.
Electrical Circuits
Caution
The valve will reach a high temperature when used with high
temperature fluids such as steam. Confirm that the valve
temperature has dropped sufficiently before performing work. If
touched inadvertently, there is a danger of being burned.
Removal
1. Shut off the fluid supply and release the fluid pressure in the
system.
2. Shut off the power supply.
3. Demount the product.
3. Low frequency operation
Switch valves at least once every 30 days to prevent
malfunction.
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 0.1MPa.
3. Clean strainers when the pressure drop reaches 0.1MPa.
2. Storage
Conduit terminal
AC
1. Do not use valves in atmospheres of
corrosive gases, chemicals, salt water, water,
or where there is direct contact with same.
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.
SOL.
In case of long term storage after use with steam, first thoroughly remove all moisture to prevent rust and deterioration of
rubber materials, etc.
Operating Precautions
Without light
AC
Warning
SOL.
With light
Light
1. Valves will reach high temperatures from high
temperature fluids such as steam. Use
caution, as there is a danger of being burned
if a valve is touched directly.
2. Valves may reach high temperatures when
continuously energized. Use caution, as there
is a danger of being burned if a valve is
touched directly.
4.5-61
VX
VN
VQ
VDW
VC
LV
PA
Series VCS
Specific Product Precautions
Be sure to read before handling.
Replacing the Solenoid Coil
Caution
Replacement Parts
Solenoid coil part numbers
The valve will reach high temperatures from high
temperature fluids such as steam. Confirm that the
valve has cooled sufficiently before performing work. If
touched inadvertently, there is a danger of being
burned.
Clip
VCS 20
1 G
Lead wire length
Series
20
30
40
Class 2
Class 3
Class 4
Nil
L1
L2
L3
L4
Voltage
1
2
3
4
36
Flat head screw driver
Solenoid coil
Insert a flat head screw driver
into the hook section of the clip
groove.
Clip
100VAC
200VAC
110VAC
220VAC
230VAC
300mm
600mm
1000mm
1500mm
3000mm
Electrical entry
G
C
T
TL
Grommet
Conduit
With conduit terminal
With conduit terminal/light
part numbers
Page 4.5-53 Valve model
AZ-T-VCS How to Order Valves → Page 4.5-57 Valve model
Note) Indicate the valve model, as a label will be attached to the clip.
Seal
part numbers
Valve
For VCS20
OR-1860-120- P
Tilt the screw driver down in
direction so that the clip slides
out in direction .
For VCS30
P: PTFE
F: FKM
OR-2380-130- P
For VCS40
P: PTFE
F: FKM
OR-2600-180- P
Manifold
P: PTFE
F: FKM
For VCS20
OR-1400-178- P
P: PTFE
F: FKM
OR-2670-178- P
For VCS30, 40
When the loosened clip is pulled
out in direction using
pinchers, etc., the coil can be
removed and replaced in
direction .
P: PTFE
F: FKM
OR-1717-178- P
P: PTFE
F: FKM
OR-3305-178- P
P: PTFE
F: FKM
After replacing the coil, the clip is reinstalled by pushing it back in the
direction opposite to its removal.
4.5-62
When external leakage occurs after disassembling a valve,
replace the above seals.
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