Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B is a genuine 5/2-way solenoid valve solenoid valve with 31008B ports and an effective area of See datasheet (Cv —). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
- Valve type5/2-way
- FunctionSolenoid valve
- Port size31008B
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B
The B03-4V31008B is the explosion-proof version of AirTAC's 4V310-08B, built for hazardous or flammable atmospheres where standard valves could pose a risk. It is a 5/2-way single solenoid valve with spring return, meaning it directs compressed air to one side of a double-acting cylinder while exhausting the other, and springs back to its home position when the signal is removed. This model carries a DC24V coil rated at 3.0W, and its 1/4" PT ports suit pneumatic circuits with moderate flow demands.
With an effective area of 28.0 mm² (Cv 1.65), this valve delivers strong flow for its size, comfortably driving cylinders in the 50-80 mm bore range. The spool-and-sliding-column design responds in 0.05 seconds or less, and the aluminum-alloy body keeps weight at just 310 g. Since the B03- prefix indicates an explosion-proof build, please confirm the exact protection rating and certification for your specific zone with us before installation.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 31008B |
| Exhaust port | 31008B |
| Effective area (Cv) | See datasheet (Cv —) |
| 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 | See datasheet |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | See datasheet |
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 | See datasheet |
|---|---|
| Flow coefficient | Cv — |
| Response time | ≤ 0.05 s |
| Coil power | AC 3.5–4.5 VA · DC 2.5–3.0 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 B03-4V Explosion-Proof Solenoid Valve B03-4V31008B
| 4V | Solenoid valve, spool type, 4-series. |
|---|---|
| B | Body size (4V) — sets port & flow. |
| 0 | 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: 4VB10 (single), 4VB20 (double), 4VB30C/E/P (5/3 center). Add the voltage suffix when ordering.
Where the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B Is Used
Chemical Processing
Controls double-acting actuators in chemical plants where flammable vapors may be present. The explosion-proof build reduces ignition risk while the 28.0 mm² effective area delivers reliable actuation.
Paint Spray Booths
Operates pneumatic clamps and positioning cylinders in paint booths with solvent-laden air. Spring return ensures the cylinder returns to a safe position when power is removed.
Fuel Handling Systems
Directs air to double-acting valves in fuel transfer and storage areas. The DC24V coil provides low-power control, and the 0.05 s response keeps cycles efficient.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008B the Right Valve?
Choose the B03-4V31008B when your application requires explosion protection in a hazardous environment, and your cylinder falls in the 50-80 mm range. The 1/4" PT ports match standard piping, and the DC24V coil integrates easily with typical PLC control systems. If your cylinder is smaller, the 4V200 series (Cv 1.0) offers a more compact solution; for larger bores, step up to the 4V400 (Cv 2.82).
When replacing an existing valve, verify the body size (4V300), function (5/2 single solenoid), port size and thread (1/4" PT), coil voltage (DC24V), and electrical entry (terminal box). The B03- prefix specifically denotes the explosion-proof enclosure, so confirm the protection level matches your site requirements with our team.
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 B03-4V Explosion-Proof Solenoid Valve B03-4V31008B FAQ
The B03- prefix marks this as AirTAC's explosion-proof version of the standard 4V310-08B. It is built for hazardous or flammable atmospheres. We do not have the specific protection level or certification details in our data, so please confirm the exact rating for your zone with us before ordering.
Yes, as a 5/2-way valve it is designed specifically for double-acting cylinders. It pressurizes one port while exhausting the other, and the spring return moves the spool back when the DC24V signal is removed. With Cv 1.65, it suits cylinders in the 50-80 mm bore range.
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