Airtac 3V2 Solenoid Valve 3V208NOFI
The AirTAC Airtac 3V2 Solenoid Valve 3V208NOFI is a genuine 3-port 2-position (3/2) solenoid valve with 1/4 in ports. It either feeds its outlet or vents it to exhaust, which is what makes it the valve for single-acting cylinders, on/off air blow, clamping, vacuum switching and pilot duty.
- Valve type3/2-way (3-port, 2-position)
- Initial stateNormally open
- Port size1/4 in
- Coil voltageDC12V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.19
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V208NOFI
The 3V208NOFI pairs a DC12V coil with a pre-wired lead-out, the cleanest option for mobile and battery-powered builds where DIN plug hardware is not carried on site. Strip, land and seal the two wires and the valve is live.
As a normally open 3/2 valve it passes air from supply to outlet while unpowered and vents the outlet when the solenoid pulls in, driving single-acting cylinders, blow jets, clamps or pilot stages. The coaxial poppet seats sharply at Cv 0.19 (3.4 mm2 per port), and this body carries the 3V2 family's negative-pressure rating of -102.2 kPa to 0.1 MPa - a capability the 3V1 and 3V2M do not share.
Airtac 3V2 Solenoid Valve 3V208NOFI Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V208NOFI |
|---|---|
| Series | 3V2 |
| Valve type | 3/2-way (3-port, 2-position) |
| Function | Direct-acting, single solenoid, spring return |
| Initial state | Normally open |
| Port size | 1/4 in |
| Thread | PT |
| Coil voltage | DC12V |
|---|---|
| Electrical entry | Flying lead (lead-out wire type) |
| Coil power | 7.0 W |
| Operating pressure | 0-0.8 MPa (0-114 psi) |
| Vacuum service | Rated -102.2 kPa to 0.1 MPa |
| Flow coefficient | Cv 0.19 (3.4 mm2 effective area) |
| Temperature | -20 to 70 C |
| Construction | Coaxial shut-off (poppet), direct-acting, spring return |
| Protection | IP65 (DIN 40050) |
| Medium | Air, filtered by a 40 µm or finer element. Lubrication not required. |
Figures follow the official AirTAC 3V2 catalogue. Confirm coil voltage and thread (PT / NPT / G) against the product label before wiring.
Model Code: Airtac 3V2 Solenoid Valve 3V208NOFI
| 3V2 | Body — sets the flow, the coil power and whether vacuum is rated. |
|---|---|
| 1/4 in | Port size. M5, 06 = 1/8 in, 08 = 1/4 in, 10 = 3/8 in. |
| NO | Normally open: air passes until the coil is energised. |
| DC12V | Coil voltage. A = AC220V, B = DC24V, C = AC110V, E = AC24V, F = DC12V. |
| I | Electrical entry: I = flying lead, otherwise a DIN plug. |
| PT | Port thread. PT ships from stock; G and NPT are available to order. |
What a 3/2 Valve Does
A 3/2 valve has three ports — supply, outlet and exhaust — and two states. It either feeds the outlet or vents it to exhaust, and that is the whole job.
That makes it the right valve for a single-acting (spring-return) cylinder, on/off air blow, a clamp, switching a vacuum generator or suction cup, and piloting a larger valve.
It cannot run a double-acting cylinder. A double-acting cylinder needs air alternately on two sides, which takes a 5-port valve — the AirTAC 4V series.
Where the Airtac 3V2 Solenoid Valve 3V208NOFI Is Used
Mobile robot vacuum gripper
On an AMR fitted with a suction gripper, the pre-wired DC12V lead connects straight to the robot's battery rail, and the NO state keeps the vacuum path open if control power is ever lost.
Emergency vent on a pneumatic door lock
Wired so that losing 12 V leaves the vent path open, the valve dumps a fire-exit door-lock cylinder to exhaust during a power failure, keeping the escape-route release on the safe side.
Solar-powered clamp cart
A battery-and-solar workshop cart runs its vacuum clamp grid through this valve; the DC12V coil matches the cart's electrical system and the flying lead removes any need for connector hardware.
Is the Airtac 3V2 Solenoid Valve 3V208NOFI the Right Part?
Before ordering, lock in: port 1/4in (PT standard on this family; G and NPT are options you add at order), NO initial state, DC12V voltage, flying-lead entry, and whether vacuum is in the circuit. Downsize to 3V1 when the task is small and every watt counts (3.0 W on DC24V there versus 7.0 W here) or to 3V2M when a manifold beats individual plumbing but flow can drop to Cv 0.1. Upsize to 3V3 (Cv 0.62, vacuum rated) when the flow coefficient must climb well past 0.19. For a double-acting cylinder, switch to the AirTAC 4V series - a 3/2 valve cannot reverse one.
Confirm before you order
- ✓ Port size and thread (PT from stock; G / NPT to order)
- ✓ Initial state — NC or NO, ordered up front
- ✓ Coil voltage matches your controller output
- ✓ Electrical entry — DIN plug or flying lead
- ✓ Single valve, bare base, or complete assembly
- ✓ Single-acting duty, not double-acting
Installation & Wiring Notes
- check Use clean air filtered to 40µm or finer.
- check Stay within 0-0.8 MPa (0-114 psi) operating pressure.
- check Match the coil voltage to your controller output.
- check Use the manual override to test before powering up.
- check Leave the exhaust port clear, or fit a silencer.
- check Wiring by qualified personnel, per AirTAC documentation.
Airtac 3V2 Solenoid Valve 3V208NOFI FAQ
The 1/4in body passes Cv 0.19 per port with a 3.4 mm2 effective area; the smaller 3V206 (1/8in) is Cv 0.18 / 3.2 mm2. Pressure spans 0-0.8 MPa with vacuum service allowed at -102.2 kPa to 0.1 MPa. Operating temperature is -20 to 70 C. AC coils use 7 VA and DC coils 7.0 W, the housing meets IP65 (DIN 40050), and the air supply needs filtration of 40 um or finer.
The lead-out suits battery-powered and mobile equipment where DIN connectors are not on hand; the wires land straight into a fuse box or terminal strip. Functionally nothing changes: normally open, direct acting, spring return, Cv 0.19 on 1/4in PT ports, vacuum rated to -102.2 kPa. For NC, other voltages or a DIN plug, the same body is available in those options.
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