Airtac 3V3 Solenoid Valve 3V308NOEI
The AirTAC Airtac 3V3 Solenoid Valve 3V308NOEI 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 voltageAC24V
- Electrical entryFlying lead (lead-out wire type)
- Flow (Cv)0.62
- Series3V3
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac 3V3 Solenoid Valve 3V308NOEI
Circuits that run below atmospheric pressure are where the 3V308NOEI earns its place: the same body that takes 0-0.8 MPa of compressed air is rated for vacuum service from -102.2 kPa to 0.1 MPa. It is a normally open 3/2 valve, so the 1/4 inch PT port passes air or vacuum from supply to outlet at rest, and the energised AC24V coil shuts the path and vents the line.
The coil comes on a flying lead for direct harness connection rather than a DIN socket. Direct-acting, spring-return and built around a coaxial poppet, it delivers a Cv of 0.62 — the highest in the 3V range — which pays off with larger vacuum cups and longer eject lines. IP65 coil protection (DIN 40050) keeps it sealed in washdown-prone cells.
Airtac 3V3 Solenoid Valve 3V308NOEI Technical Specifications
| Model | Airtac 3V3 Solenoid Valve 3V308NOEI |
|---|---|
| Series | 3V3 |
| 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 | AC24V |
|---|---|
| Electrical entry | Flying lead (lead-out wire type) |
| Coil power | 10 VA |
| Operating pressure | 0-0.8 MPa (0-114 psi) |
| Vacuum service | Rated -102.2 kPa to 0.1 MPa |
| Flow coefficient | Cv 0.62 |
| 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 3V3 catalogue. Confirm coil voltage and thread (PT / NPT / G) against the product label before wiring.
Model Code: Airtac 3V3 Solenoid Valve 3V308NOEI
| 3V3 | 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. |
| AC24V | 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 3V3 Solenoid Valve 3V308NOEI Is Used
Gantry vacuum pick-and-place
Switches vacuum to a large suction cup on a pick-and-place gantry; the normally open path holds the part if control power is lost, and energising the coil releases it in a controlled vent.
Multi-cup plate lifter
Feeds one zone of a multi-cup array lifting sheet steel, where the 0.62 Cv keeps flow losses low across long vacuum lines to the outermost cups.
Vacuum test bench
Connects and vents a vacuum reservoir on a leak-test rig wired at AC24V, with the flying lead terminating straight at the bench controller.
Is the Airtac 3V3 Solenoid Valve 3V308NOEI the Right Part?
Nothing in the 3-port range sits above the 3V3 on flow, so sizing means stepping down when Cv 0.62 is more than needed: to a 3V2 (1/8 or 1/4 port, Cv 0.18-0.19, also vacuum-rated), to a 3V2M (Cv 0.1) when a compact multi-station manifold matters more than flow, or to a 3V1 for the smallest low-power jobs (3.0 W on DC24V). Before ordering, settle five things: port and thread (PT1/4 is the family standard, with G and NPT as options to order), initial state (this code is NO), coil voltage (AC24V), electrical entry (flying lead here; remove the I for a DIN plug), and whether the duty includes vacuum — this body does. For 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 3V3 Solenoid Valve 3V308NOEI FAQ
Flow coefficient Cv 0.62, pressure range 0-0.8 MPa, vacuum rating -102.2 kPa to 0.1 MPa, temperature -20 to 70 C, 10 VA on the AC24V coil (DC builds of this family take 6.5 W), IP65 protection to DIN 40050, 1/4 inch PT port, 3/2-way normally open function.
Pick NO when the outlet must stay fed — or the vacuum cup must stay loaded — while the coil is off, so a power failure leaves the process in its running state; energising then stops the flow and vents. Pick NC when the outlet must be dead until the coil energises. Both states are orderable in the 3V3 family.
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