Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A is a genuine 5/2-way solenoid valve solenoid valve with 31008A 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 size31008A
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A
The B03-4V31008A is the explosion-proof version of AirTAC's 4V310-08A, built for hazardous or flammable atmospheres where a standard valve could pose a risk. This 5/2-way single-solenoid valve directs compressed air to double-acting cylinders and actuators, using a spring return that resets the spool the moment the coil de-energises-so it needs a constant signal to stay shifted. The B03- prefix marks the protected enclosure; the exact protection level and certification for your specific zone must be confirmed with us before installation.
With an effective area of 28.0 mm² (Cv 1.65), this valve suits double-acting cylinders in the 50-80 mm bore range, delivering a response time of 0.05 s or less. The AC220V coil draws just 4.5 VA, keeping control-panel load low, while the 310 g aluminium-alloy body keeps mounting simple. The terminal-box entry accepts standard wiring, and the 1/4" PT tapered ports provide a leak-tight seal on threaded pipe.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 31008A |
| Exhaust port | 31008A |
| 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 B03-4V31008A
| 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. |
| -31008A | 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 B03-4V31008A Is Used
Machine Tool Clamping
Controls double-acting clamps on CNC fixtures where flammable coolant mist is present. The explosion-proof build reduces ignition risk while the 1/4" port delivers adequate flow for 50-80 mm clamp cylinders.
Material Handling in Solvent Areas
Shifts double-acting pusher cylinders on conveyor diverters in paint shops or solvent storage areas. Spring return ensures the cylinder retracts if power drops, and the 4.5 VA AC coil keeps heat generation low.
Chemical Plant Actuation
Operates double-acting process valves in atmospheres with flammable vapors. The 28.0 mm² effective area provides reliable actuation for small-bore process cylinders, while the protected enclosure suits the hazardous environment.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V31008A the Right Valve?
Choose the B03-4V31008A when your double-acting cylinder falls in the 50-80 mm range and you need the explosion-proof build for a hazardous area. If the bore drops below 50 mm, the 4V200 series with Cv 1.0 will save space and cost; above 80 mm, step up to the 4V400 at Cv 2.82 for adequate flow. The single-solenoid spring return suits applications where a power loss must fail the valve to a known safe position.
For replacement, match the 4V300 body size, the 5/2 single-solenoid function, the 1/4" PT port and thread, the AC220V coil voltage, and the terminal-box entry. Confirm the explosion-proof rating and certification with us before ordering-we stock genuine AirTAC units and can advise on the correct build for your zone.
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 B03-4V31008A FAQ
B03- marks AirTAC's explosion-proof build of the base 4V310-08A model. It is designed for hazardous or flammable atmospheres where a standard valve could ignite the surroundings. The exact protection level, certification, and suitability for your specific zone must be confirmed with us-we do not publish those details in this listing.
This 5/2 valve has an effective area of 28.0 mm² (Cv 1.65), which suits double-acting cylinders in the 50-80 mm bore range. The single solenoid with spring return means it requires a constant electrical signal to stay actuated; removing power springs the spool back to the home position.
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