Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A is a genuine 5/2-way solenoid valve solenoid valve with 21006A 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 size21006A
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A
The B03-4V21006A is AirTAC's explosion-proof build of the 4V210-06A, a 5/2-way single-solenoid valve with spring return. It directs compressed air to double-acting cylinders and actuators, and when de-energised, the internal spring immediately returns the spool to its home position. This version is engineered for hazardous or flammable atmospheres where a standard valve could pose a risk, making it a safer choice for demanding industrial environments.
With a 17.0 mm² effective area (Cv 1.0), this valve suits cylinders in the O32-50 mm bore range and delivers a fast response time of 0.05 seconds or less. The AC220V coil draws just 4.5 VA, and the valve weighs 220 g. The B03- prefix marks the explosion-proof variant, but the exact protection rating and certification for your specific zone must be confirmed with us before installation.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 21006A |
| Exhaust port | 21006A |
| 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 B03-4V21006A
| 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. |
| -21006A | 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 B03-4V21006A Is Used
Hazardous-Area Actuation
Operate pneumatic cylinders in environments with flammable vapors or dust where standard valves are not permitted. The explosion-proof build of the B03-4V21006A provides the necessary protection for these sensitive locations.
Automated Assembly Stations
Control clamping and positioning fixtures on assembly lines that handle solvents or other volatile materials. The spring-return function ensures the actuator returns to a safe state if power is interrupted.
Chemical Processing Lines
Direct air to double-acting actuators on dosing or mixing equipment in chemical plants. The 17.0 mm² effective area delivers reliable operation for O32-50 mm cylinders in these critical processes.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21006A the Right Valve?
Choose the B03-4V21006A when you need explosion-proof protection in a compact 1/8" port package. The 5/2 single-solenoid design is ideal for applications that require a positive return to a known state when power is removed. If your cylinder is smaller than O32mm, consider stepping down to the 4V100 series (Cv 0.6) for better economy; for larger bores or faster cycling, step up to the 4V300 series (Cv 1.65).
When replacing an existing valve, verify the body size (4V200), function (5/2 single), port and thread (PT 1/8"), coil voltage (AC220V), and electrical entry (terminal box). The B03- prefix indicates the explosion-proof enclosure, so confirm the specific protection level and certification 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 B03-4V21006A FAQ
The B03- prefix marks this as AirTAC's explosion-proof version of the standard 4V210-06A. It is built for use in hazardous or flammable atmospheres. The exact protection rating, certification body, and zone suitability are not included in our data, so you must confirm these details with us before purchase.
This valve has an effective area of 17.0 mm² and a Cv of 1.0. It is designed to suit double-acting cylinders in the O32-50 mm bore range. The response time is 0.05 seconds or less, ensuring quick and reliable actuation.
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