AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI)
The AirTAC AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 31008EI 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 size31008EI
- Effective area28.0 mm²
- Flow (Cv)1.65
- Series4V300
About the AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI)
The AirTAC 4V310-08EI is a 5/2-way single-solenoid pneumatic valve built on the 4V300 aluminum body platform. It directs compressed air to double-acting cylinders and actuators, energising to shift the spool and returning by mechanical spring when the signal is removed. This model comes pre-wired with a 0.5 m flying lead through a DIN-style grommet entry and is fitted with an AC24V coil drawing 5.0 VA.
With an effective area of 28.0 mm² (Cv 1.65), the valve suits ~O50-80 mm bore cylinders in general industrial automation. The sliding-column spool responds in 0.05 s or less, and the IP65-rated enclosure keeps dust and low-pressure water jets out. The 1/4-inch PT ports make it a direct match for many compact manifold or standalone installations where AC24V control power is preferred.
AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) Technical Specifications
| Model | AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 31008EI |
| Exhaust port | 31008EI |
| 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 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI)
| 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. |
| -31008EI | 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 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) Is Used
Mid-Bore Cylinder Actuation
Drives double-acting pneumatic cylinders in the ~O50-80 mm range on packaging and assembly conveyors. The spring-return action ensures the actuator returns to a safe home position when the AC24V signal is dropped.
Machine Tool Clamping
Controls air-operated clamps and fixtures on CNC or machining centres. The 0.05 s response and IP65 grommet entry suit environments with coolant mist, where AC24V control circuits are already in use.
Standalone Press Control
Pilots a pneumatic press or stamping head that requires a constant run signal. The 5.0 VA AC24V coil and flying-lead connection simplify wiring into existing machine panels without adding a DC power supply.
Is the AirTAC 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) the Right Valve?
Choose the 4V310-08EI when your control system runs on AC24V and you need a spring-return 5/2 valve with a pre-wired grommet lead. The 4V300 body’s Cv 1.65 sits between the smaller 4V200 (Cv 1.0) and the larger 4V400 (Cv 2.82), so it is the right pick for mid-bore double-acting cylinders. If the cylinder bore is below ~40 mm, stepping down to a 4V200 avoids over-sizing; for bores above ~100 mm, a 4V400 gives faster fill.
For a drop-in replacement, match five points: body size (4V300), function (single solenoid 5/2), port and thread (1/4-inch PT), coil voltage (AC24V), and electrical entry (grommet). If you later need to hold position on power loss, switch to a double-solenoid 4V320 or a 5/3 closed-center 4V330C. Manifold-base versions are also available when you want to gang multiple valves on a common supply.
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 4V310-08EI Solenoid Valve, 5/2-way, PT1/4, AC24V, grommet entry (4V31008EI) FAQ
With an effective area of 28.0 mm² (Cv 1.65), it is well matched to double-acting cylinders in the ~O50-80 mm bore range. It provides sufficient flow for mid-speed cycling without the overshoot that a larger valve body might introduce on a small cylinder.
The 'I' suffix denotes a DIN-style grommet with a 0.5 m flying-lead wire set, not a terminal box. You wire the leads directly into your control circuit. The coil is rated AC24V 5.0 VA, so confirm your transformer can supply the inrush burden.
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Related AirTAC 4V Valves
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