VCB EU

VCB EU
Series VC
Direct Operated 2 Port Solenoid Valve for Heated Water
Series VCB
VX
VN
VQ
VDW
VC
LV
PA
4.5-31
Multipurpose Valve for Heated Water
Direct Operated 2 Port Solenoid
Valve for Heated Water
Series VCB
Improved durability (Nearly twice the life of the previous series)
Use of special magnetic material reduces
the operating resistance of moving parts.
Longevity, wear resistance and corrosion
resistance improved.
High flow rate:
157 to 2062 Nl/min
Compact: Single valve volume reduced 15% (Class 3)
Clip type
Quick change coil
Clip design makes coil
replacement easy.
Flame resistant
molded coil material
UL94 V-0 standard
Coil size and weight reduced
New compact coil reduces the
size and weight of the valve
Volume: –15% Compared to previous series
Weight: –20% (Class 3)
}
Threaded assembly
Simplifies maintenance
Improved corrosion
resistance
Improved corrosion resistance
Special materials introduced
Bottom mounting threads
Mounting bracket also available
Enclosure: Dust-proof & splash-proof (IP65 equivalent)
Wiring specifications (Class H coil)
Wiring variations
Three compact sizes available
Conduit terminal
4.5-32
VCB2
VCB3
VCB4
Class 2
Class 3
Class 4
Direct Operated 2 Port Solenoid Valve
for Heated Water
Series
Series VC
VCB
How to Order Valves
VC B 2 1
1 G
2
02
Q
For heated water
Option
When no symbol is shown for
material and insulation type
• Body material: CAC406
• Seal material: FKM
• Coil insulation: Class H
Nil
F
Material and insulation type
Symbol Body material Seal material Coil insulation
Nil
FKM
CAC406
(BC6)
M
EPDM
Class H
N
FKM
SUS
P
EPDM
Series
2
3
4
None
Foot type bracket
Class 2
Class 3
Class 4
Valve type
Thread type
N.C.
Nil
N
F
OUT
1
Rc
NPT
G
IN
VX
Port size
Symbol
01
02
03
04
06
Voltage
1
2
3
4
36
9
Order
Made
100VAC
200VAC
110VAC
220VAC
230VAC
∗Other, less than 250VAC
∗ Consult SMC regarding
other voltages.
Electrical entry
T – With conduit terminal
TL – With conduit terminal
and light
Port size
1/8 (6A)
1/4 (8A)
3/8 (10A)
1/2 (15A)
3/4 (20A)
Class 2
—
—
—
Class 3
—
—
Class 3
—
Class 4
—
Class 4
—
VN
VQ
VDW
VC
Orifice size
Symbol Orifice size (mmø) Class 2
2
2
3
3
4
4
5
5
—
7
7
—
10
10
LV
PA
∗ Refer to the table below for orifice and port size combinations.
Orifice and port size combinations
Class
2
3
4
Port size
Orifice size (mmø)
2
3
4
5
7
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)
—
— —
— —
10
4.5-33
VCB
Series
Direct Operated 2 Port for Heated Water
Standard Specifications
Valve construction
Direct operated poppet
Fluid
Heated water (99°C or less)
Valve specifications
Withstand pressure MPa
5.0
Body material
CAC406 (BC6), SUS
Seal material
FKM, EPDM
Ambient temperature °C
–20 to 100
Fluid temperature °C
99 or less
Enclosure
Dust proof, Splash proof (equivalent to IP65)
Environment
Location without corrosive or explosive gases
Valve leakage cm³/min
0 (with water pressure)
Mounting orientation
Unrestricted
Vibration/Impact resistance m/s² Note 1)
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
VCB2: 4.9/4.1, VCB3: 7.7/6.6, VCB4: 10.5/9.3
Inrush
VCB2: 22/19, VCB3: 36/30, VCB4: 45/37
Holding
VCB2: 10/8, VCB3: 15/13, VCB4: 19/16
Note 1) 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
VCB2
VCB3
VCB4
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
mmø
Maximum
Effective area
operating
mm²
pressure
(Nl/min)
differential MPa
2
2.0
2.8 (157)
3
0.8
5.9 (324)
4
0.5
9.2 (500)
5
0.3
11.7 (638)
3
2.0
6.3 (344)
4
0.8
9.7 (530)
5
0.5
14.4 (785)
7
0.2
24.8 (1354)
10
0.1
37.8 (2061)
3
3.0
6.3 (344)
4
1.3
10.8 (589)
5
0.7
15.3 (834)
7
0.3
24.8 (1354)
10
0.12
37.8 (2061)
Maximum
operating
pressure
MPa
Weight
kg
3.0
1/8: 0.21
1/4: 0.24
3.0
1/4: 0.42
3/8: 0.40
1/2: 0.49
3.0
1/4: 0.58
3/8: 0.55
1/2: 0.62
3/4: 0.78
Note 1) Refer to model selection on page 5 regarding port size and orifice size combinations.
Construction
Parts list
No.
4.5-34
Description
Material
Standard
Stainless steel
1
Clip
2
Core assembly
3
Coil assembly
4
Armature assembly
5
Seal
FKM (EPDM)
6
Return spring
Stainless steel
7
Body
Stainless steel/Cu
Class H
Stainless steel/FKM (EPDM)
CAC406 (stainless steel)
Series
VCB
Dimensions
2-M
Thread
depth N
L
Conduit terminal: T
K
(Q)
F
R
C
25
U
34
E
G1/2
B
A
H
D
(S)
2-P
Port size
(mm)
Electrical entry
Model
P
Port size
A
B
C
D
E
F
H
K
L
N
M
Conduit terminal: T
Q
VCB21
VCB31
1/8
13.5
28
64
31
6.5
12.5
28
14
12.8
M4
4.5
8.5
99
R
S
U
50
66
83
86
1/4
18
36
67.5
31
12.5
28
18
12.8
M4
6
99
53
66
1/4, 3/8
22
40
81.5
36.5 11
15
32
20
19
M5
8
101
66.5
68
99
1/2
30
50
86
36.5 13.5
15
32
25
23
M5
8
101
71
68
104
1/4, 3/8
22
45
90
41
11
17
36
22.5
23
M5
8
103
74.5
70
107
1/2
30
50
94
41
13.5
17
36
25
23
M5
8
103
78.5
70
111.5
3/4
35
60
102
41
17.5
17
36
30
28.2
M5
8
103
86.5
70
119
VCB41
VX
VN
VQ
VDW
Bracket Dimensions
VC
A
J
4-øG
C
LV
1.5
E
D
B
L
PA
4-øH
Valve mounting hole
F
Bracket material: Stainless steel
Bracket mounting dimensions
(mm)
Valve model
Port size
Bracket part no.
A
B
C
D
E
F
G
H
J
L
VCB2
1/8, 1/4
VCW20-12-01A
34
40
25
30
12.8
12.8
5
4.5
6
13
1/4, 3/8
VCW30-12-02A
42
52
30
40
19
19
6
5.5
7
19
1/2
VCW30-12-04A
48
56
36
44
23
23
6
5.5
7
23
1/4, 3/8
VCW40-12-02A
42
52
30
40
23
23
6
5.5
7
19
1/2
VCW30-12-04A
48
56
36
44
23
23
6
5.5
7
23
VCW40-12-06A
3/4
65
44
56
∗ Two mounting screws (for mounting bracket) are included with the above parts.
53
28.2
28.2
6
5.5
7
26
VCB3
VCB4
4.5-35
Series
VCB
Direct Operated 2 Port for Heated Water
Model Selection
VCB (for heated water) 2 port solenoid valve
Model
Material
Body
Class
2
VCB
(for heated
water)
2 port
solenoid
valve
Orifice size mmø
Port size
Seal
CAC406
(SUS)
FKM
(EPDM)
3
4
2
3
4
5
7
10
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)
—
—
—
—
—
OUT
IN
Viewing the graph
Flow rate Q l /min
100
10
5.0
To generate a water flow of 5 l /min at a differential pressure of 0.1MPa,
an effective area with Cv factor 0.35 (VCB34 , ø3) or more is required.
.1 1.38
=2
Cv Cv =
0
ø1 3 ø7
5
3 0.8
B 4 VCB 4
v=
VC
C
.16
5
=0
ø
Cv
B4
C
2
V
ø
B2
VC
How to find the flow rate for water
• Formula based on Cv factor
Q = 14.2 ⋅ Cv ⋅ 10.2 ⋅ ∆P … l /min
• Formula based on effective area (Smm²)
Q = 0.8 ⋅ S ⋅ 10.2 ⋅ ∆P …… l /min
VCB 43 ø3 Cv = 0.35
1.0
VCB2ø3 Cv = 0.33
VCB2ø5 Cv = 0.65
VCB3ø4 Cv = 0.54
VCB2ø4 Cv = 0.51
0.1
0.001
0.01
0.1
1
10
Pressure differential ∆P = (P₁ – P₂) MPa
Q: Flow rate (l /min)
∆P: Pressure differential (P₁ — P₂)
P₁: Upstream pressure (MPa)
P₂: Downstream pressure (MPa)
S: Effective area (mm²)
Cv: Cv factor
Explanation of Terminology
Electrical Terminology
Pressure Terminology
1. Maximum operating pressure differential
This indicates the maximum pressure differential (the difference between the upstream and downstream pressure) 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 upper 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. Proof pressure
The pressure which must be withstood without deterioration in
performance when the valve returns to the operating pressure
range (the value under the specified conditions).
4.5-36
1. Surge voltage
A high voltage which is momentarily generated in the shut-off unit
by shutting off the power.
Other
1. Materials
FKM: Fluoro rubber – Trade names: Viton®, Dai-el®, etc.
EPDM: Ethylene propylene rubber
CAC406: Bronze (BC6)
C37: Brass
SUS: Stainless steel
Series
VCB
2 Port Solenoid Valve for Fluid Control Precautions
Operating Environment
Wiring
Caution
Warning
1. As a rule, use electrical wire with a cross
sectional area 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
Conduit terminal
Terminal cover
Round head
combination screw
M3
1
+
A
+ mark
A
1. Perform maintenance in accordance with the
procedures in the instruction manual.
M3
View A-A
(Internal connection diagram)
Conduit terminal
∗ Tighten the terminal cover screws and terminal screws with a torque of 0.5N⋅m.
Electrical Circuits
Caution
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.
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.
Switch valves at least once every 30 days to prevent malfunction.
Caution
SOL.
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.
In case of long term storage after use with heated water, first
thoroughly remove all moisture to prevent rust and deterioration
of rubber materials, etc.
Operating Precautions
Without light
Warning
AC
SOL.
With light
Light
VN
VQ
VDW
VC
LV
PA
1. Filters and strainers
2. Storage
Conduit terminal
VX
3. Low frequency operation
Terminal screw
AC
Warning
2. Removing the product
In the case of the conduit terminal, make connections according to
the marks shown below.
– mark
Maintenance
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
2
-
1. Do not use valves in atmospheres of corrosive
gases, chemicals, salt water, water, 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.
1. Valves will reach high temperatures from
high temperature fluids. 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.
4.5-37
VCB
Specific Product Precautions
Series
Replacing the Solenoid Coil
Caution
Replacement Parts
Solenoid coil part numbers
The valve will reach high temperatures from high
temperature fluids such as heated water. 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
Nil
L1
L2
L3
L4
Class 2
Class 3
Class 4
300mm
600mm
1000mm
1500mm
3000mm
Note) Grommet type only
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
Electrical entry
T
TL
With conduit terminal
With conduit terminal/light
part numbers
AZ-T-VCB
Note) Indicate the valve model, as a label will be attached to the clip.
Seal
part numbers
Valve
For VCB20
OR-1860-120- F
Tilt the screw driver down in direction
so that the clip slides
out in direction .
For VCB30
F: FKM
E: EPDM
OR-2380-130- F
For VCB40
F: FKM
E: EPDM
OR-2600-180- F
F: FKM
E: EPDM
If external leakage occurs after replacing the coil, replace
the above seals.
When the loosened clip is pulled
out in direction using pinchers,
etc., the coil can be removed and
replaced in direction .
After replacing the coil, the clip is reinstalled by pushing it back in the
direction opposite to its removal.
4.5-38
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