Specifications: Three-port, two-position solenoid valve; Series: 2; Port size: 1/4 inch; Initial state: normally open (NO); Rated voltage: 110 V AC; Electrical connection: flying leads, 0.5 m lead length; Port thread: PT1/4.
Product Catalog
Download Airtac Product Catalog (PDF)
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Airtac 3V2 series valves are functional alternatives to SMC VT307 series valves.
Model Code Explained
This model: 3V208NOCI
Model code
Meaning for this model
3V
Three-port, two-position solenoid valve
2
Series 2
08
1/4 inch port size
NO
Normally open (NO)
C
110 V AC
I
Flying leads, 0.5 m lead length
Blank thread code
PT1/4 ports
Technical Specifications
Parameter
Specifications for this model
Model
3V208NOCI
Product type
Three-port, two-position (3/2-way) solenoid valve
Operation
Direct acting; normally open (NO)
Working medium
Air filtered through a 40 μm filter
Port threads
PT1/4; three ports
Effective flow area
3.4 mm²
Flow coefficient
Cv = 0.19
Lubrication
Not required
Operating pressure: standard service
0–0.8 MPa (0–114 psi), as stated in the catalog
Vacuum application
Suitable for vacuum (negative-pressure) applications; confirm the required operating range before selection.
Proof pressure
1.2 MPa (175 psi), as stated in the catalog
Operating temperature
−20 to 70 °C
Body material
Aluminum alloy
Electrical Specifications
Parameter
Specification
Rated voltage
110 V AC
Operating voltage tolerance
AC: ±15%
Power consumption
7 VA (AC)
Protection rating
IP65 (DIN 40050)
Insulation class
Class B
Electrical connection
Flying leads
Lead length
0.5 m
Energization time
0.05 s or less
Maximum operating frequency
10 cycles/s under no-load conditions
Features and Operation
Direct-acting switching; this model is normally open (NO).
Coaxial shut-off structure for effective sealing and high airflow.
No additional oil lubrication is required.
A manual override assists with installation and commissioning.
The series offers several standard voltages; use the voltage specified for this model.
The catalog also identifies vacuum (negative-pressure) applications.
Symbol ports: P = pressure supply, A = working port, R = exhaust. When de-energized, P connects to A and R is blocked. When energized, P is blocked and A connects to R. The spring returns the valve to its normal state. Refer to the matching NO symbol in the PDF catalog.
External and Mounting Dimensions
For detailed product dimensions and mounting drawings, please download and refer to the PDF catalog.
Dimensions below follow the flying lead drawing on printed page 36 of the 2022 catalog. Lengths, spacings and depths are in mm. Each local dimension refers to its own dimension line; use the PDF drawing to locate it.
Dimension location
Catalog dimension
Drawing configuration
Flying lead version
Side view: upper horizontal dimension
38.5 mm
Side view: height dimension
66.5 mm
Front view: body width
29.5 mm
Front view: local horizontal and vertical dimensions
13 mm and 13 mm; separate dimension lines
Side view: bottom horizontal dimension
33 mm
Side view: lower vertical dimensions
22.5 mm and 10.3 mm; separate dimension lines
Rear port center height for this port size
13.5 mm
Port callouts for this model
3 × PT1/4
Bottom view: counterbores
2 × Ø6 mm counterbores, depth 4 mm
Bottom view: through holes
2 × Ø3.3 mm through holes
Mounting/bracket view: horizontal dimensions
37, 28 and 25 mm; each belongs to its own dimension line.
Mounting/bracket view: vertical dimensions
18.6, 33, 46 and 55 mm; each belongs to its own dimension line.
Threaded mounting holes shown
2 × M4 × 0.7; depth 7 mm.
Two bracket mounting openings
The drawing marks 2–4.5; the opening width dimension is 4.5 mm.
Side view: mounting plate thickness
2 mm; mounting plate is shown as optional on the valve drawing.
The standard drawing labels 06 ports as 3–PT1/8 and 08 ports as 3–PT1/4. The actual thread on this model is PT1/4; G and NPT suffixes specify their respective threads. The drawing identifies the manual override and shows the mounting plate as optional.
Optional Mounting Accessory
Parameter
Specification
Ordering code
F-3V2FA
Name
FA mounting plate for 3V2 series valves
Supply status
Optional mounting accessory; the valve model code does not specify an included FA mounting plate.
Accessory code breakdown
F: mounting accessory; 3V2: valve series; FA: FA mounting plate
Flow / Performance Characteristics
The catalog flow graph is labeled 3V208NC. This graph is series reference information for 3V208NC, not a performance curve verified for this model.
Graph element
Catalog reference
Graph model
3V208NC
Horizontal axis
Flow rate in L/min; marks: 0, 50, 100, 150, 200, 250, 300, 350
Vertical axis
Operating pressure in MPa; marks: 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7
Reading the graph
Use the original plotted curves in the PDF catalog. The 350 L/min axis limit is not a rated-flow specification.
Internal Components
Item numbers refer to the series internal-structure drawing on printed page 35. They identify components, not quantities supplied in an accessory kit.
Drawing item
Component
1
Countersunk screw
2
Spacer
3
Spool assembly
4
Spring
5
Body
6
Gasket
7
Electromagnet assembly
8
Push rod
9
Coil
10
Moving armature assembly
11
Retaining washer
12
Retaining nut
13
Manual override button
14
Electrical connector
15
Connector gasket
Series Ordering Options
Series reference only: these are alternative ordering options. The configuration of this product is stated in Specifications and Model Code Explained above.
Valve ordering sequence: 3V + 2 + port size + initial state + rated voltage + electrical connection + thread code. The catalog example is 3V208NCA.
Option
Available series configurations
Valve type / series
3V: three-port, two-position solenoid valve; 2: Series 2
Port size
06: 1/8 inch; 08: 1/4 inch
Initial state
NC: normally closed; NO: normally open
Rated voltage
A: 220 V AC; B: 24 V DC; C: 110 V AC; E: 24 V AC; F: 12 V DC
Electrical connection
Blank: DIN connector; I: flying leads, lead length 0.5 m
Port thread
Blank: PT; G: G thread; T: NPT
Flow area by port size
06: 3.2 mm² (Cv 0.18); 08: 3.4 mm² (Cv 0.19)
Electrical reference
AC: 7 VA, voltage tolerance ±15%; DC: 7.0 W, voltage tolerance ±10%
Other drawing dimensions
DIN reference: upper horizontal span 65.5 mm; front-view height 74 mm. Rear-port center height: 06 = 15 mm; 08 = 13.5 mm. Refer to each separate view.
Reference Weight
Catalog reference weight: 157 g. The 2022 AirTAC catalog lists the 3V2 series at 157 g; individual voltage and thread options are not separately weighed. Actual weight is subject to the physical product; this is not a measured packed shipping weight.
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