
The AirTAC AirTAC 4V310-08F Solenoid Valve, 5/2-way, PT1/4, DC12V, terminal entry (4V31008F) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 31008F 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.
The AirTAC 4V310-08F is a 5/2-way single-solenoid pneumatic directional valve built on the 4V300 body platform. It directs compressed air to double-acting cylinders and actuators, energising the DC12V coil to shift the spool and using a mechanical spring to return it to the default position when the signal is removed. This spring-return action makes it a predictable choice for circuits where the valve must default to a safe state on power loss.
With a 1/4-inch PT port configuration and a 28.0 mm² effective area (Cv 1.65), this model suits double-acting cylinders in the ~O50-80 mm bore range. The DC12V coil draws just 2.5 W of power, and the valve body weighs 310 g. Its spool-and-sleeve design delivers a fast response time of 0.05 seconds or less, and the IP65-rated enclosure ensures reliable operation in washdown and dusty environments.
| Model | AirTAC 4V310-08F Solenoid Valve, 5/2-way, PT1/4, DC12V, terminal entry (4V31008F) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 31008F |
| Exhaust port | 31008F |
| 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.
| 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.
| 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. |
| -31008F | 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.
Controls mid-bore double-acting pushers and diverters on conveyor systems. The 2.5 W DC12V coil runs cool in continuous-duty cycles, while the 4 c/s max frequency handles rapid sorting gates.
Directs a double-acting clamp cylinder on CNC fixtures and drilling jigs. The spring-return function ensures the clamp retracts automatically if the 12V control signal is interrupted, simplifying operator safety.
Drives the vertical Z-axis of a pick-and-place unit. The 0.05 s response time gives crisp part placement, and the IP65 body withstands the light oil mist common in automated assembly cells.
Select the 4V310-08F when your application needs a single-solenoid 5/2 valve with a 1/4-inch port and a DC12V power supply. The 4V300 body’s Cv 1.65 flow capacity is a step up from the 4V200 series (Cv 1.0), making it the right size for driving mid-bore cylinders that require more force and speed than a compact valve can deliver. If your cylinder bore exceeds 80 mm, stepping up to the 4V400 body (Cv 2.82) will provide the necessary flow.
For a drop-in replacement, match five points exactly: the 4V300 body size, the 5/2 single-solenoid function (10), the 1/4-inch PT thread, the DC12V coil voltage, and the terminal-box electrical entry. This valve can be mounted individually or ganged on a manifold base to build a compact, centralized valve terminal for multi-actuator machines.
Quick checklist
With an effective area of 28.0 mm² (Cv 1.65), this valve is well-matched to double-acting cylinders in the ~O50 to O80 mm bore range. It provides a good balance of flow and speed for mid-range pneumatic actuators without oversizing the valve.
The 4V310-08F uses a DC12V electrical signal to shift the spool against a spring. When the 12V signal is removed, the spring mechanically pushes the spool back to its home position. This guarantees the valve returns to a known state, typically exhausting the cylinder's previously pressurised side.
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