Airtac 3V2 Solenoid Valve 3V208NCAI
The AirTAC Airtac 3V2 Solenoid Valve 3V208NCAI 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 closed
- Port size1/4 in
- Coil voltageAC220V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.19
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V208NCAI
The I at the end of 3V208NCAI changes the electrical entry: this AC220V coil arrives with a pre-wired lead-out instead of the DIN socket, so the installer lands the wires on terminal points or through a grommeted panel rather than plugging a connector. Function is unchanged - a 3/2 direct-acting poppet valve, spring return, normally closed, so the 1/4in outlet stays vented until energised.
Flow is 3.4 mm2 effective area (Cv 0.19) per port, coil power is 7 VA, and the coil housing is rated IP65. The body is also vacuum-capable to -102.2 kPa, a rating missing from the 3V1 and 3V2M families. Manual override is fitted for setup checks. Every unit is genuine AirTAC, supplied against your RFQ.
Airtac 3V2 Solenoid Valve 3V208NCAI Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V208NCAI |
|---|---|
| Series | 3V2 |
| Valve type | 3/2-way (3-port, 2-position) |
| Function | Direct-acting, single solenoid, spring return |
| Initial state | Normally closed |
| 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 3V208NCAI
| 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. |
| NC | Normally closed: no air at the outlet 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 3V208NCAI Is Used
Hard-wired controls in a washdown plant
Food and washdown panels favour leads over connectors; the flying lead-out lands directly on terminal strips inside the sealed enclosure, preserving the IP65 rating of the coil housing.
Laboratory vacuum manifold switching
Routes house vacuum to a filtration rig on demand; the -102.2 kPa rating covers negative-pressure lines, so one valve type serves both vacuum and pressure circuits on the bench.
Bag-sealer jaw actuation
Drives the single-acting cylinder that presses the sealing jaw on a bagging machine; loss of supply vents the line and the return spring lifts the jaw clear of the product.
Is the Airtac 3V2 Solenoid Valve 3V208NCAI the Right Part?
Match five things to the code: 1/4in port and PT thread (G or NPT can be ordered), normally closed state, AC220V coil, flying-lead entry - and vacuum, which this body accepts between -102.2 kPa and 0.1 MPa. Choose the DIN version (3V208NCA) if technicians prefer a replaceable plug; keep the I suffix where leads are wired into a junction box or panel loom.
For sizing, the honest step up in flow is 3V3 at Cv 0.62, not another 3V208 - the 0.18 to 0.19 jump from 1/8in to 1/4in is nearly nothing. Step down to 3V1 for light duty at 3.0 W on DC24V, or to 3V2M when a multi-station manifold matters more than flow (Cv 0.1). Double-acting cylinders go to the 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 3V208NCAI FAQ
Full set in one place: the 3V208 body gives 3.4 mm2 effective area (Cv 0.19) per port, while the 1/8in 3V206 gives 3.2 mm2 (Cv 0.18). Pressure range is 0-0.8 MPa with vacuum service rated -102.2 kPa to 0.1 MPa. Media temperature is -20 to 70 C. Coil power is 7 VA on AC coils and 7.0 W on DC coils, and protection is IP65 (DIN 40050).
NC means no air reaches the outlet until the coil is energised - fail-safe venting for clamps, jaws and blow guns if power drops. If the process needs air to flow while de-energised, order the NO variant instead; both states exist in this series. Neither variant can drive a double-acting cylinder - that requires a 5-port AirTAC 4V valve.
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