AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B)
The AirTAC AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 31008B 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 size31008B
- Effective area28.0 mm²
- Flow (Cv)1.65
- Series4V300
About the AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B)
The 4V310-08B is a 5/2-way single-solenoid directional valve built on the AirTAC 4V300 aluminium body. It directs compressed air to one side of a double-acting cylinder while exhausting the other, and a mechanical spring returns the spool to its home position the moment the DC24V signal is removed—so it needs a constant electrical command to stay shifted.
With an effective area of 28.0 mm² (Cv 1.65) and a response time of 0.05 s or less, this valve suits ~Ø50‑80 mm cylinders in cycling applications. The DC coil draws just 3.0 W, and the terminal-box entry keeps wiring tidy inside a control cabinet. Weight is 310 g, operating pressure 0.15‑0.8 MPa, IP65 protection.
AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) Technical Specifications
| Model | AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 31008B |
| Exhaust port | 31008B |
| 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 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B)
| 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. |
| -31008B | 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 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) Is Used
Clamping & Fixturing
Drives double-acting clamp cylinders on machining centres. The spring-return action releases the workpiece automatically when the DC24V signal drops, adding a predictable safety behaviour.
Diverter Gates
Shifts pneumatic gates on packaging conveyors. The 28.0 mm² effective area fills a mid-bore cylinder quickly, keeping sortation cycles under 0.05 s response.
Press & Forming Tools
Controls the advance-retract stroke of a pneumatic press head. The terminal-box wiring suits control-cabinet mounting, and the 3.0 W coil runs cool even in continuous-duty tooling.
Is the AirTAC 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) the Right Valve?
Choose the 4V310-08B when your cylinder bore falls in the Ø50‑80 mm range and you need a spring-return 5/2 function. If the cylinder is smaller (Ø32‑40 mm), stepping down to a 4V200 series (Cv 1.0) often gives crisper response; for larger bores above Ø100 mm the 4V400 (Cv 2.82) provides the extra flow margin. Single-solenoid spring-return is the right call when the valve must default to a safe position on power loss—if you need the spool to stay put without power, look at the double-solenoid 4V320 instead.
For a drop-in replacement, match five points: body size (4V300), function (5/2 single), port and thread (1/4″ PT), coil voltage (DC24V), and electrical entry (terminal box). The valve can be used standalone or on an AirTAC 300-series manifold base when you are grouping several stations.
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 4V310-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V31008B) FAQ
It is sized for double-acting cylinders roughly Ø50 to 80 mm. The 5/2 flow path gives an effective area of 28.0 mm² (Cv 1.65), which provides ample speed for that bore range at 0.15‑0.8 MPa. For a Ø100 mm or larger cylinder, consider the 4V400 series for higher Cv.
No—this is a single-solenoid spring-return model. When the DC24V signal is interrupted the internal spring pushes the spool back to its normal position, exhausting the cylinder port that was pressurised. If your process needs the spool to hold its last state during a power loss, choose the double-solenoid 4V320 variant instead.
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