
The AirTAC Airtac 3V2M Solenoid Valve 3V2MNOCI-2F 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.
A normally open assembly inverts the fail logic: 3V2MNOCI-2F passes supply air to both outlets while de-energised and vents them when the AC110V coils are energised. Each of the two valve bodies is a direct-acting, spring-return 3/2 poppet with flying leads instead of DIN sockets, mounted on a 2-station base with centralised exhaust.
Normally open is chosen deliberately - for purge lines, vent interlocks or any duty where air must keep flowing through a control-circuit failure. It cannot be created after the fact: the NO state is built into the valve and its dedicated base gasket and cannot be reversed to NC. Both coils together draw 14 VA (7 VA each on AC110V), flow is Cv 0.1 per station, and the bodies are IP65 with manual overrides fitted.
| Model | Airtac 3V2M Solenoid Valve 3V2MNOCI-2F |
|---|---|
| Series | 3V2M |
| Valve type | 3/2-way (3-port, 2-position) |
| Function | Direct-acting, single solenoid, spring return |
| Initial state | Normally open |
| Item form | Complete assembly — 2 valves on a shared base |
| Exhaust | Centralised exhaust |
| Port size | 1/8 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 | Not rated for vacuum |
| Flow coefficient | Cv 0.1 |
| Temperature | -20 to 70 C |
| Construction | Coaxial shut-off (poppet), base-mounted, spring return |
| Protection | IP65 (DIN 40050) |
| Medium | Air, filtered by a 40 µm or finer element. Lubrication not required. |
Figures follow the official AirTAC 3V2M catalogue. Confirm coil voltage and thread (PT / NPT / G) against the product label before wiring.
| 3V2M | 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. |
| AC110V | Coil voltage. A = AC220V, B = DC24V, C = AC110V, E = AC24V, F = DC12V. |
| I | Electrical entry: I = flying lead, otherwise a DIN plug. |
| 2F | 2 stations in one assembly, centralised exhaust. |
| PT | Port thread. PT ships from stock; G and NPT are available to order. |
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.
Two cooling-air nozzles on a bolting station keep blowing air across tool chucks while the line idles; de-energised NO valves let the purge continue, and energising stops it.
A university lab fume-cabinet air-knife pair stays open through controller faults because NO valves pass air until energised, keeping the sweep flow alive when power drops.
A depot grain-loading spout runs two dust-suppression air jets from one manifold; the NO valves keep the jets flowing during a control failure and shut only when the PLC commands it.
Verify five points: NO state (fixed at purchase), AC110V coils, flying lead entry, two stations, centralised exhaust; PT1/8 is the standard port and G or NPT are catalogue options. Two stations suit a compact function pair; add capacity by ordering a longer base, since stations combine and expand freely. Where one function needs more flow than Cv 0.1, use a free-standing 3V2 (Cv 0.18 at 1/8, 0.19 at 1/4) or a 3V3 (Cv 0.62, 1/4); use 3V1 at 3.0 W DC when power draw is the constraint. Double-acting cylinders are outside 3/2 scope - specify the AirTAC 4V 5-port series.
Confirm before you order
3/2 normally open, Cv 0.1 per valve, 0-0.8 MPa (0-114 psi), -20 to 70 C, AC110V coils at 7 VA each (14 VA total), IP65 (DIN 40050), PT1/8 ports, with G and NPT to order.
NO keeps the outlet fed while de-energised, the right default when air must survive a control failure; NC shuts on failure. The state is fixed at manufacture and the dedicated base gasket cannot be reversed to convert NO to NC, so the choice is permanent once ordered.
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