AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI)
The AirTAC AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 31008AI ports and an effective area of 28.0 mm² (Cv 1.65). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
- Valve type5/2-way
- FunctionSingle solenoid (spring return)
- Port size31008AI
- Effective area28.0 mm²
- Flow (Cv)1.65
- Series4V300
About the AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI)
The AirTAC 4V310-08AI is a 5/2-way single-solenoid pneumatic directional valve that controls double-acting cylinders and actuators by directing compressed air to one side while exhausting the other. Its spring-return mechanism requires a continuous AC220V signal to hold the shifted position; when de-energised, the spool snaps back to its home state, making it a predictable choice for applications where the valve must default to a known position on power loss.
This model comes pre-wired with a 0.5-metre flying lead via a DIN-style grommet entry, simplifying installation on machines where a terminal box is inconvenient. The 4.5 VA AC coil delivers a response time of 0.05 seconds or below, and with an effective area of 28.0 mm² (Cv 1.65) it provides ample flow for cylinders in the ~50-80 mm bore range. The aluminium body weighs 310 g and operates on filtered air from 0.15-0.8 MPa.
AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) Technical Specifications
| Model | AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 31008AI |
| Exhaust port | 31008AI |
| Effective area (Cv) | 28.0 mm² (Cv 1.65) |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Pilot type | Internal / external pilot |
| Operating pressure | 0.15 – 0.8 MPa |
| Proof pressure | 1.2 MPa |
| Max frequency | 4 cycle/sec |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | 310 g |
Specifications follow the official AirTAC 4V series datasheet. Lubrication not required. Confirm coil voltage and thread (PT / NPT / G) against the product label before wiring.
Flow & Coil Options
| Effective area | 28.0 mm² |
|---|---|
| Flow coefficient | Cv 1.65 |
| Response time | ≤ 0.05 s |
| Coil power | AC 4.5 VA · DC24V 3.0 W · DC12V 2.5 W |
| Protection / insulation | IP65 (DIN40050), B-class |
| Voltage options | DC24V, DC12V, AC110V, AC220V |
| Manual override | Yes (locking / non-locking) |
Size the valve so effective area / Cv is not the bottleneck for your cylinder bore and speed. Undersized valves slow the actuator. Note 5/3 (center) versions have a smaller effective area than the 5/2 of the same body size.
Model Code: AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI)
| 4V | Solenoid valve, spool type, 4-series. |
|---|---|
| 3 | Body size (4V300) — sets port & flow. |
| 1 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -31008AI | Port thread: M5 / 06=1/8" / 08=1/4" / 10=3/8" / 15=1/2". |
Related: 4V310 (single), 4V320 (double), 4V330C/E/P (5/3 center). Add the voltage suffix when ordering.
Where the AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) Is Used
Machine Tool Clamping
Directs a double-acting clamp cylinder on a CNC fixture. The spring-return action ensures the clamp releases if AC power is cut, protecting the workpiece and tooling.
Sorting Gate Actuation
Drives a pneumatic gate on a conveyor diverter. The 0.05 s response and Cv 1.65 flow rate give crisp, repeatable gate movements for medium-bore cylinders.
Press Feed Mechanism
Controls the double-acting feed cylinder on a stamping press. The pre-wired grommet lead and AC220V coil fit neatly into the press control cabinet layout.
Is the AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) the Right Valve?
Choose the 4V310-08AI when you need a single-solenoid 5/2 valve with a 1/4-inch port and an AC220V supply, especially where a pre-wired grommet lead simplifies field wiring. If your cylinder is smaller (below ~50 mm bore) and you want to save space, the 4V200 series offers a Cv of 1.0; for larger bores above 80 mm, step up to the 4V400 series with its Cv of 2.82. A single-solenoid valve like this one is ideal when the process requires the valve to return to a safe home position if power is interrupted.
When replacing an existing valve, match all five points: the 4V300 body size, the 10 (single 5/2) function, the 1/4-inch port with PT thread, the AC220V coil voltage, and the grommet electrical entry. This valve can be mounted individually or on an integrated manifold base if you are building a multi-valve bank.
Quick checklist
- ✓ Required flow (Cv) for cylinder & speed
- ✓ Function: single / double / 5-3 center
- ✓ Coil voltage (DC24 / AC220 …)
- ✓ Port thread (M5 / 1/8 / 1/4 / 3/8 / 1/2)
- ✓ Single valve or manifold base?
Installation & Wiring Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 0.8 MPa operating pressure.
- check Match coil voltage to your controller output.
- check Use the manual override to test before powering.
- check Fit silencers or fittings to the exhaust ports.
- check Wiring by qualified personnel per AirTAC docs.
AirTAC 4V310-08AI Solenoid Valve, 5/2-way, PT1/4, AC220V, grommet entry (4V31008AI) FAQ
With an effective area of 28.0 mm² (Cv 1.65), this 5/2 valve suits double-acting cylinders roughly in the 50 to 80 mm bore range. The actual speed depends on the cylinder stroke, load, and supply pressure (0.15-0.8 MPa).
The 'I' suffix denotes a grommet-style entry with a 0.5-metre flying lead, which is pre-wired to the AC220V coil. This makes it faster to connect in the field and eliminates the need to open a terminal box cover, useful for tight or washdown-prone installations.
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Related AirTAC 4V Valves
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