AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI)
The AirTAC AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 31008BI 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 size31008BI
- Effective area28.0 mm²
- Flow (Cv)1.65
- Series4V300
About the AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI)
The AirTAC 4V310-08BI is a 5/2-way single-solenoid pneumatic directional valve that directs compressed air to double-acting cylinders and actuators. Its spool-and-sleeve design requires a constant DC24V electrical signal to hold the shifted position; de-energising the coil lets the integrated mechanical spring return the spool to its home state, making it a predictable choice for cycles where a fail-safe default position is needed.
This particular SKU is factory-configured with a DIN-style grommet entry and a 0.5 m pre-wired flying lead, which simplifies installation into control cabinets and cable chains. The 4V300 body delivers an effective area of 28.0 mm2 (Cv 1.65) and a response time of 0.05 s or below, suiting it to ~Ø50-80 mm cylinders. The DC24V coil draws just 3.0 W, keeping panel heat low.
AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) Technical Specifications
| Model | AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 31008BI |
| Exhaust port | 31008BI |
| 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 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI)
| 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. |
| -31008BI | 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 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) Is Used
Mid-Bore Cylinder Actuation
Directly drives double-acting pneumatic cylinders in the Ø50-80 mm range on conveyor diverters and transfer stations, where the spring-return action ensures the actuator retracts to a safe position when power is cut.
Machine Tool Clamping
Controls air-powered clamps and fixtures on CNC mills and drilling stations. The fast 0.05 s response and DC24V grommet wiring suit the repetitive, high-cycle demands of automated machining cells.
Packaging & Palletising
Operates pushers and case erectors in packaging lines. The 28.0 mm2 effective area provides the flow needed for quick cylinder strokes, while the IP65-rated grommet entry withstands dusty plant environments.
Is the AirTAC 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) the Right Valve?
Choose the 4V310-08BI when you need a single-solenoid 5/2 valve with a 1/4 in PT port and a pre-wired DC24V grommet lead. The 4V300 body is the right flow class for mid-bore double-acting cylinders; step down to a 4V200 (Cv 1.0) for smaller actuators or up to a 4V400 (Cv 2.82) for larger ones. For a valve that stays in its last position without holding current, pick the double-solenoid 4V320 series instead.
When replacing an existing unit, match five points: body size (4V300), function (single 5/2), port and thread (1/4 in PT), coil voltage (DC24V), and electrical entry (grommet with flying lead). This valve also mounts on a standard 4V300 manifold base if you are building a multi-station valve group.
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 4V310-08BI Solenoid Valve, 5/2-way, PT1/4, DC24V, grommet entry (4V31008BI) FAQ
With an effective area of 28.0 mm2 (Cv 1.65), this 4V300-series valve is typically matched with double-acting cylinders in the ~Ø50 to 80 mm bore range. The exact speed depends on your operating pressure, tubing diameter, and stroke length, but its flow capacity is designed for mid-bore actuators.
Yes. The single-solenoid 4V310 requires constant DC24V power to stay in the actuated position. When the signal is removed, the mechanical spring pushes the spool back to its default state. If you need a valve that holds position after a pulse, consider the double-solenoid 4V320.
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