Airtac 3V2 Solenoid Valve 3V208NOCI
The AirTAC Airtac 3V2 Solenoid Valve 3V208NOCI 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 voltageAC110V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.19
- Series3V2
About the Airtac 3V2 Solenoid Valve 3V208NOCI
Built for vacuum circuits that also need pre-wired wiring, the 3V208NOCI pairs the normally open 1/4in 3V2 body with a flying-lead coil rated at AC110V (7 VA). The lead-out wires arrive ready to land on your terminals, avoiding a loose DIN plug inside a moving machine or a cramped cabinet. Three ports, two positions: at rest the vacuum or supply line is connected through, and energising the solenoid cuts the path while venting the outlet to exhaust. Spring return is built in.
The coaxial poppet is direct-acting and holds from -102.2 kPa vacuum up to 0.8 MPa, a negative-pressure rating the 3V1 and 3V2M bodies do not carry. Flow per port is Cv 0.19 with 3.4 mm2 effective area. Use air filtered to 40 um or finer; lubrication is not required.
Airtac 3V2 Solenoid Valve 3V208NOCI Technical Specifications
| Model | Airtac 3V2 Solenoid Valve 3V208NOCI |
|---|---|
| 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 | AC110V |
|---|---|
| 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 3V208NOCI
| 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. |
| AC110V | 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 3V208NOCI Is Used
CNC router hold-down
A vacuum table on a CNC router keeps the spoilboard clamped whenever power is off; the NO valve maintains the vacuum path at rest and the energised coil vents it to release the finished sheet.
Palletiser vacuum cups
On a palletising cell a suction frame lifts cartons; each zone's vacuum line runs through this valve, so a zone can be dropped at the pallet by energising its AC110V coil.
Fixture clamp release
Pneumatic swing clamps on a machining fixture stay fed at rest; landing the flying-lead wires on the PLC output lets the controller vent the clamp line the instant a cycle needs the part free.
Is the Airtac 3V2 Solenoid Valve 3V208NOCI the Right Part?
Order by five checkpoints: 1/4in port, PT thread as the family standard with G and NPT available to order, normally open state, AC110V coil, flying-lead entry, and any vacuum in the circuit. When less flow and lower coil draw would do, the 3V1 runs at 3.0 W on DC24V; when station density on a shared base beats flow, the 3V2M gives roughly Cv 0.1 per station through its manifold. For a genuine flow increase, jump to the 3V3 - its 1/4in Cv 0.62 is several times this valve, whereas the 1/8in to 1/4in move inside the 3V2 range alone lifts Cv only from 0.18 to 0.19. Double-acting cylinders are outside 3-port territory; specify the AirTAC 4V series for those.
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 3V208NOCI FAQ
Effective area and Cv per port: 1/8in 3V206 = 3.2 mm2 and Cv 0.18; 1/4in 3V208 = 3.4 mm2 and Cv 0.19. Operating pressure 0-0.8 MPa; vacuum rating -102.2 kPa to 0.1 MPa. Temperature -20 to 70 C. Coil power 7 VA (AC) or 7.0 W (DC); this AC110V flying-lead coil is the 7 VA case. Protection IP65 (DIN 40050). Air should be filtered to 40 um or finer.
With NO the connection exists while the coil is off, so a power cut leaves the vacuum holding or the clamp fed - a fail-safe condition for hold-down and clamp lines. NC would drop the vacuum the moment power fails. If instead you need flow only while energised, order the NC version of the same body; the state is fixed by the ordering code.
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