Airtac 3V2 Solenoid Valve 3V208NOAI
The AirTAC Airtac 3V2 Solenoid Valve 3V208NOAI 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 voltageAC220V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.19
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V208NOAI
Where a vacuum circuit and a 220 V supply meet, 3V208NOAI covers both: a normally open 3/2 poppet valve rated from -102.2 kPa to 0.1 MPa, so it can pass or shut down negative-pressure lines as well as ordinary 0-0.8 MPa compressed air. Its flying-lead entry means the AC220V coil arrives pre-wired, ready for direct termination in the panel.
Direct-acting with spring return, the coaxial poppet needs no minimum pressure to shift - useful when the vacuum line starts at zero. Per-port flow is Cv 0.19 (3.4 mm2) on the 1/4in PT port, and the housing carries an IP65 (DIN 40050) rating.
Airtac 3V2 Solenoid Valve 3V208NOAI Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V208NOAI |
|---|---|
| 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 | AC220V |
|---|---|
| Electrical entry | Flying lead (lead-out wire type) |
| Coil power | 7 VA |
| 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 3V208NOAI
| 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. |
| AC220V | 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 3V208NOAI Is Used
Rapid-release vacuum plate on a CNC nesting table
Energising closes the valve and collapses the vacuum holding MDF or laminate sheets; an NC valve would need continuous power just to release the part.
Panel loom build for a thermoforming line
The flying lead wires directly into the machine loom, switching vent lines above a forming station without extra connectors to seat in a cramped cabinet.
Vacuum ejector isolation on a pick-and-place gantry
The valve cuts supply to the ejector between cycles; the -102.2 kPa rating means the shut-off state also withstands full vacuum on the upstream side.
Is the Airtac 3V2 Solenoid Valve 3V208NOAI the Right Part?
For small duties, 3V1 saves coil power (3.0 W on DC24V against 7 VA here) but loses the vacuum rating. For dense multi-station builds, 3V2M on a base plate trades flow (Cv 0.1) for packing density and also drops vacuum capability. When genuine extra flow is needed, 3V3 delivers Cv 0.62 on 1/4in and does keep the -102.2 kPa rating. Before ordering, settle the five: 1/8in or 1/4in port, thread (PT is the standard on this family, G and NPT are orderable), NC or NO start state, coil voltage, DIN plug or flying lead, and whether vacuum appears anywhere in the duty. A double-acting cylinder needs a 5-port valve - the AirTAC 4V series.
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 3V208NOAI FAQ
Flow per port: 3.4 mm2 effective area, Cv 0.19 (the 1/8in 3V206 body: 3.2 mm2, Cv 0.18). Operating pressure 0-0.8 MPa, with vacuum service covered from -102.2 kPa to 0.1 MPa. Temperature window -20 to 70 C. AC coils take 7 VA, DC coils 7.0 W. Enclosure rating IP65 (DIN 40050).
Yes - the -102.2 kPa to 0.1 MPa negative-pressure rating is a body rating, independent of whether you order the NC or NO variant. Note the catalogue gives no vacuum flow rate or pump-down figure; size the ejector or pump from its own datasheet, then use this valve to switch the line.
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