Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B is a genuine 5/2-way solenoid valve solenoid valve with 21006B 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 size21006B
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B
The B03-4V21006B is AirTAC's explosion-proof version of the 4V210-06B, designed for environments where flammable gases or dust may be present. This 5/2-way single solenoid valve uses a spring return: 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 DC24V signal is removed. The B03- prefix signals the hazardous-duty build, but the exact protection rating and certification for your specific zone must be confirmed with us before installation.
With an effective area of 17 mm² (Cv 1.0) and a response time of 0.05 s or less, this valve suits double-acting cylinders in the 32-50 mm range. The DC24V coil draws just 3.0 W, and the aluminum-alloy body weighs 220 g. It operates from 0.15-0.8 MPa, needs no lubrication, and carries IP65 protection for dusty or damp industrial settings.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 21006B |
| Exhaust port | 21006B |
| 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 B03-4V21006B
| 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. |
| -21006B | 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 B03-4V21006B Is Used
Hazardous-area actuation
Pneumatic cylinders in paint shops or chemical processing lines often sit near flammable vapors. This explosion-proof valve controls double-acting actuators while reducing ignition risk in such zones.
Assembly station control
Use it to cycle clamping fixtures or positioning pins on an assembly line. The 0.05 s response keeps cycle times short while the spring return ensures a safe home position when power drops.
Packaging machine pushers
Drive a double-acting pusher cylinder that sorts or diverts products. The Cv 1.0 flow delivers adequate speed for 32-50 mm cylinders, and the IP65 rating shrugs off washdowns.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006B the Right Valve?
Choose the B03-4V21006B when you need explosion-proof construction in a 1/8" port valve for a double-acting cylinder up to 50 mm. If your cylinder is smaller than 32 mm, the 4V100 series (Cv 0.6) may be more economical; for larger bores or faster cycling, step up to the 4V300 (Cv 1.65). This single-solenoid model requires a constant signal to stay actuated-if you need the valve to hold its last position on power loss, consider the double-solenoid 4V220 instead.
When replacing an existing valve, match these five points: body size (4V200), function (5/2 single), port (1/8" PT), coil voltage (DC24V), and electrical entry (terminal box). The B03- prefix adds the explosion-proof enclosure, so verify the protection level with us to ensure it meets your site's requirements.
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 B03-4V21006B FAQ
B03- marks AirTAC's explosion-proof build of the 4V210-06B. It's 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.
Yes. It's a 5/2-way single solenoid valve with spring return. It pressurizes one port while exhausting the other, moving a double-acting cylinder in one direction; removing the DC24V signal springs it back. It suits 32-50 mm cylinders with its 17 mm² effective area (Cv 1.0).
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