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EXPLAINED
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- VEP/VEF, Electro-Pneumatic Proportional Valve
VEP/VEF, Electro-Pneumatic Proportional Valve
A proportional control valve system provides the ability to infinitely control the position of the internal spool assembly which increases or decreases the amount of flow or pressure being released from the valve. SMC offers 2 types of proportional control valves, a pressure type VEP which controls secondary pressure by varying the current through the solenoid, and a flow rate type VEF which controls air flow by varying current through the solenoid.
- Electro-pneumatic proportional valve
- Pressure type and flow type
- Port sizes: 1/4, 3/8, 1/2, 3/4
- Ambient temperature: 0~50°C
- Max. operating pressure: 1.0 MPa
How to order
2(A)
2(A)2(A)1(P)
3(R)
1(P)
1(P)
3(R)
Electro-Pneumatic Proportional Valve
Series VEF/VEP
Without
sub-plate
Without
sub-plate
Without
sub-plate
Symbol
Flow
type
(VEF2)
Flow
type
(VEF3)
Pressure
type
(VEP3)
Note) Does not conform to ISO1179-1.
03
<Flow type>
3 4 1 11VEF
1
2
3
13
9
5
12
8
4.5
2.5
1 30
45
1
3
3
2
2
2
4
14
Nil
02
03
1/4
3/8
1/4
3/8
Nil
02
03
02
03
04
03
04
06
1/4
3/8
1/2
3/8
1/2
3/4
1
2
3
4
0.05 s or less
Specifications
Proportional Solenoid Specifications
Model
Flow type Pressure type
Item
Air
3% F.S.
0.5% F.S.
3% F.S. or less
Not required (Use turbine oil Class 1, ISO VG32, if lubricated.)
3% F.S.
1.0 MPa
0 to 50°C (With no condensation)
VEF2121
VEF3121
VEF2141
VEF3141
VEF2131 VEP3121 VEP3141
0.03 s or less
0.03 s or less 0.05 s or less
,
0.9
Note) The non-lubricated specification is not applicable to these models.
0.91.0 1.41.4
4
1
8
3
,
4
1
8
3
,
4
1
,
8
3
2
1
8
3
,
2
1
4
3
,
8
3
,
2
1
4
3
03
04
06
25
3/8
1/2
3/4
03
<Pressure type>
4 1 1VEP31
1
2
14
2
Nil
02
03
1/4
3/8
03
04
06
3/8
1/2
3/4
Standard characteristics
Set pressure range (MPa)
0.05 to 0.65MPa
0.1 to 0.9MPa
0.005 to 0.15MPa
Symbol
1
,
VEF3121
(Flow type)
VEP3141
(Pressure type)
VEF2131
(Flow type)
VEP3121
(Pressure type)
VEF3141
(Flow type)
Nil
F
N
T
Rc
G
NPT
NPTF
Nil
F
N
T
Rc
G
Note)
NPT
NPTF
How to Order
Electro-pneumatic proportional valve:
Flow type (VEF)
Controls the flow rate steplessly according to
current. (It is a 2/3 port valve that has an
electrical throttle valve function.) A model that
is suitable for operating conditions, such as the
number of ports or maximum effective area, can
be selected.
Electro-pneumatic proportional valve:
Pressure type (VEP)
Controls the pressure steplessly according to
current. Also, because the effective fully opened
area of the exhaust side is identical due to its
construction, this valve provides a large exhaust
capacity and can be used as a relief valve. (It is
a 3 port valve that has an electrical pressure
reducing valve function.)
Port size Rc
Fluid
Maximum operating pressure
Hysteresis
Sensitivity
Linearity
Lubrication
Weight (kg)
Ambient and fluid temperature
Response time
Repeatability
Max. current
Rated power consumption
Coil insulation type
Max. temperature
Electrical entry
Proportional solenoid recognition symbol
Applicable power amplifier
Coil resistance
VEA25
1 A
1 (Applicable power amplifier:
VEA25
)
13 Ω (Ambient temperature 20°C)
Class H or equivalent (180°C)
DIN terminal
13 W (Ambient temperature 20°C, with maximum current)
140°C (Ambient temperature 50°C, with maximum current)
Body size
Body size
Standard
characteristics
Standard
characteristics
Port size
Port size
Applicable power
amplifier
Symbol
1
Applicable power
amplifier
Thread type
Thread type
Port
Por t
Symbol
Body size
Symbol
Body size
Symbol
Standard characteristics
Max. effective area (mm
2
)
Port size
Symbol
Port size
Symbol
Symbol
Symbol
886
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