Airtac 3V2 Solenoid Valve 3V206NOFI
The AirTAC Airtac 3V2 Solenoid Valve 3V206NOFI is a genuine 3-port 2-position (3/2) solenoid valve with 1/8 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 size1/8 in
- Coil voltageDC12V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.18
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V206NOFI
Flying-lead wiring and a 12 V coil make the AirTAC 3V206NOFI the version to specify for battery-powered machines with in-house harnesses: the lead-out wires straight into the machine loom, with no DIN connector to seat or seal. Functionally it is a normally open 3/2 valve on a PT1/8 port, DC12V at 7.0 W.
A direct-acting spring-return coaxial poppet provides the shutoff, with Cv 0.18 and 3.2 mm2 effective area per port. Vacuum duty is covered too - the body is rated from -102.2 kPa to 0.1 MPa, so suction circuits can share the same valve type as pressure circuits on one machine.
Airtac 3V2 Solenoid Valve 3V206NOFI Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V206NOFI |
|---|---|
| Series | 3V2 |
| Valve type | 3/2-way (3-port, 2-position) |
| Function | Direct-acting, single solenoid, spring return |
| Initial state | Normally open |
| Port size | 1/8 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 0.18 (3.2 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 3V206NOFI
| 3V2 | Body — sets the flow, the coil power and whether vacuum is rated. |
|---|---|
| 1/8 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 3V206NOFI Is Used
Loom-integrated valves on fire-truck pump panels
Emergency-vehicle builders wire coils directly into the loom with flying leads; the normally open valve keeps gauge and purge lines live until a panel switch isolates them.
Battery torque pumps on wind-tower sites
Portable bolt-tensioning pumps running from 12 V batteries keep the pilot circuit supplied through the normally open valve until the operator energises it to stop flow.
Vacuum-assisted concrete sampling rig
A site materials team switches vacuum on a sampling bell with the normally open valve, so suction persists if battery power is lost mid-lift.
Is the Airtac 3V2 Solenoid Valve 3V206NOFI the Right Part?
Because the cable is fixed, order the right length and gauge up front and allow for strain relief where it enters the loom. Size both ways: down to 3V1 where low coil power dominates (3.0 W on DC24V) or 3V2M where a dense manifold beats flow (Cv 0.1); up to 3V3 (1/4in, Cv 0.62, also vacuum-rated) when Cv 0.18 is too small. Lock down five choices before ordering: 1/8in port and thread (PT standard, G or NPT to order), normally open state, DC12V coil, flying-lead entry, and whether vacuum is part of the duty. A double-acting cylinder needs the AirTAC 4V series instead.
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 3V206NOFI FAQ
In one place: 3V206 (PT1/8) offers 3.2 mm2 effective area, Cv 0.18; 3V208 (PT1/4) offers 3.4 mm2, Cv 0.19. Pressure 0-0.8 MPa; vacuum -102.2 kPa to 0.1 MPa; temperature -20 to 70 C; coil power 7 VA on AC and 7.0 W on DC; protection IP65 (DIN 40050). Medium is air filtered to 40 um or finer, with no lubrication needed.
In the NO version built into this code, supply passes to the outlet until the coil is energised, which closes the path and vents the outlet. Choose it when the line must stay live through a power loss. If you need the opposite - no air at the outlet until energised - order the NC state code on the same body instead.
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