Airtac 3V2 Solenoid Valve 3V206NCB
The AirTAC Airtac 3V2 Solenoid Valve 3V206NCB 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 closed
- Port size1/8 in
- Coil voltageDC24V
- Electrical entryDIN plug (DIN socket type)
- Flow (Cv)0.18
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V206NCB
On machines that run 24 V controls, the 3V206NCB switches the 1/8in air line directly from a PLC or relay output: the DC24V coil draws 7.0 W and the valve is normally closed, so the outlet stays vented until the coil is energised. Inside sits a direct-acting coaxial poppet with spring return - no pilot air and no minimum operating differential to worry about.
The PT1/8 port provides an effective area of 3.2 mm2 (Cv 0.18), enough for single-acting cylinders, clamps and blow nozzles. Pressure range is 0-0.8 MPa, and the valve also tolerates vacuum down to -102.2 kPa, so it can open or close a negative-pressure line too.
Airtac 3V2 Solenoid Valve 3V206NCB Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V206NCB |
|---|---|
| Series | 3V2 |
| Valve type | 3/2-way (3-port, 2-position) |
| Function | Direct-acting, single solenoid, spring return |
| Initial state | Normally closed |
| Port size | 1/8 in |
| Thread | PT |
| Coil voltage | DC24V |
|---|---|
| Electrical entry | DIN plug (DIN socket 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 3V206NCB
| 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. |
| NC | Normally closed: no air at the outlet until the coil is energised. |
| DC24V | Coil voltage. A = AC220V, B = DC24V, C = AC110V, E = AC24V, F = DC12V. |
| — | 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 3V206NCB Is Used
PLC-controlled clamp on a CNC fixture
The 24 V output drives the coil directly; when the program ends, the normally closed spring state vents the single-acting clamp and the part is free.
Guard-door interlock vent circuit
Interlocked with the safety relay, the valve dumps the pneumatic line to exhaust the moment the door opens, meeting energy-isolation practice.
Sample switching on a test rig
One valve alternates a test port between pressurised 0-0.8 MPa and vacuum to -102.2 kPa, letting the bench validate both regimes without re-plumbing.
Is the Airtac 3V2 Solenoid Valve 3V206NCB the Right Part?
Work through the five-point check: 1/8in port with PT thread as standard (G and NPT are order options), normally closed state, DC24V coil at 7.0 W, DIN plug entry, and vacuum duty - this body carries the -102.2 kPa rating that 3V1 and 3V2M lack. Shrink to the 3V1 (3.0 W on the same DC24V supply) for low-power panels with small duties, or to 3V2M (Cv 0.1 through the base) when a dense multi-station manifold matters more than flow. Grow to the 3V3, Cv 0.62 and also vacuum-rated, when 0.18 leaves the cycle starved. If the target is a double-acting cylinder, move to 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 3V206NCB FAQ
Pressure range 0-0.8 MPa; vacuum capability -102.2 kPa to 0.1 MPa; media temperature -20 to 70 C. Effective area and Cv: 3.2 mm2 and 0.18 for the 1/8in port, 3.4 mm2 and 0.19 for the 1/4in port. Coil power is 7 VA on AC voltages and 7.0 W on DC, with IP65 (DIN 40050) protection. The air supply must be filtered to 40 um or finer; lubrication is not required.
Yes. Unlike the 3V1 and 3V2M, the 3V2 body is rated for negative pressure from -102.2 kPa up to 0.1 MPa, so it can make or break a vacuum circuit as well as a compressed-air one. The rating covers service conditions only - for flow figures on vacuum duty, confirm from the datasheet or ask via RFQ.
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