Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B is a genuine 5/2-way solenoid valve solenoid valve with 32008B 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 size32008B
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B
The B03-4V32008B is AirTAC's explosion-proof build of the 4V320-08B, a 5/2-way double solenoid valve with memory function. It directs compressed air to double-acting cylinders and actuators, and its spool holds the last pulsed position without holding current when power is lost. This valve suits cylinders in the ~O50-80 mm bore range, delivering a 28 mm² effective area (Cv 1.65) and a fast response time of 0.05 s or less.
The B03- prefix marks this as the explosion-proof version, intended for hazardous or flammable atmospheres. It carries a DC24V coil rated at 3.0 W and weighs 400 g, with a PT1/4 tapered port and terminal box entry. As the explosion-proof variant, you should confirm the exact protection rating and certification for your specific zone with us before installation.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 32008B |
| Exhaust port | 32008B |
| 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 B03-4V32008B
| 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. |
| -32008B | 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 B03-4V32008B Is Used
Hazardous-area automation
Controls double-acting cylinders in paint shops, chemical processing lines, or solvent-handling areas where flammable vapors may be present. The explosion-proof build addresses ignition risk, but always confirm the rating matches your zone.
Memory-hold clamping
Powers double-acting clamps on machining fixtures. The memory function keeps the clamp engaged if control power drops, holding the workpiece in position until power is restored and the next pulse is sent.
Remote valve islands
Used in remote or enclosed valve cabinets near process equipment where explosive gases could accumulate. The terminal box entry simplifies wiring, and the 1/4" PT ports connect to standard pneumatic tubing.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008B the Right Valve?
Choose the B03-4V32008B when you need a double solenoid 5/2 valve with memory hold in a potentially explosive environment. Its 1/4" PT port and Cv 1.65 suit medium-bore cylinders; step down to the 4V200 series (Cv 1.0) for smaller actuators, or up to the 4V400 series (Cv 2.82) for larger bores. The double solenoid design holds its last position on power loss, unlike a spring-return single solenoid.
When replacing an existing valve, match the 4V300 body size, the 5/2 double solenoid function, the PT1/4 port and thread, the DC24V coil voltage, and the terminal box entry. The B03- prefix indicates the explosion-proof build, so verify the protection level for your zone with us. For multiple stations, consider a manifold base to consolidate wiring and reduce leak points.
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 B03-4V32008B FAQ
B03- marks AirTAC's explosion-proof build of the base 4V320-08B valve. It is intended for hazardous or flammable atmospheres. We do not list the specific protection level or certification here-please confirm the exact rating for your zone with us before ordering.
The spool stays in the position it was last pulsed to, held by land friction and balanced pressure. There is no spring to move it and no holding current. This means the valve retains its last state on power loss, but it is not a safety brake-use a mechanical brake or pilot-operated check valve for suspended loads.
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