Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A is a genuine 5/2-way solenoid valve solenoid valve with 21008A 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 size21008A
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A
The B03-4V21008A is the explosion-proof build of AirTAC's best-selling 4V210-08A, engineered for hazardous and flammable atmospheres where standard valves are not permitted. As a 5/2-way single solenoid valve, it directs compressed air to double-acting cylinders and actuators, using a spring return that resets the spool the moment the AC220V signal is removed. It delivers the full 4V200 performance class - 17 mm² effective area (Cv 1.0) - and suits cylinder bores of approximately O32-50 mm.
This configuration runs on an AC220V coil drawing just 4.5 VA, with a response time of 0.05 s or less and an IP65-rated enclosure. The B03- prefix marks it as the explosion-proof variant of the standard 4V210-08A, meaning it is built for use where ignition risk exists. The exact protection level, certification body, and gas/dust group classification are not listed here - please confirm those details with us to match your zone requirements precisely.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 21008A |
| Exhaust port | 21008A |
| 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 B03-4V21008A
| 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. |
| -21008A | 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 B03-4V21008A Is Used
Hazardous-area automation
Controls double-acting cylinders in chemical plants, paint booths, and solvent-handling lines where flammable vapors may be present and explosion-proof equipment is mandatory.
Assembly station actuation
Drives clamping and positioning fixtures on assembly lines in processing facilities, where the spring return safely resets the actuator when the AC220V signal drops.
Pneumatic pusher systems
Operates pusher cylinders that move parts between stations in environments with dust or gas hazards, relying on the Cv 1.0 flow for responsive double-acting motion.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V21008A the Right Valve?
Choose the B03-4V21008A when your application sits in a potentially explosive environment and needs a reliable 5/2 single solenoid valve with spring return. The 1/4" PT ports and Cv 1.0 flow handle most medium-duty double-acting cylinders in the O32-50 mm range. If your cylinder is smaller than O32 mm, the 4V100 series at Cv 0.6 may be more economical; for bores above O50 mm or faster cycling, step up to the 4V300 series at Cv 1.65.
For replacement, match this valve on five points: 4V200 body size, 5/2 single solenoid function, 1/4" PT thread, AC220V coil voltage, and terminal box electrical entry. The B03- prefix is the explosion-proof build - confirm the exact protection rating and certification with us before ordering 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 B03-4V21008A FAQ
The B03- prefix marks this as AirTAC's explosion-proof build of the standard 4V210-08A. It is designed for hazardous or flammable atmospheres where standard valves would be unsafe. The exact protection rating, certification body, and zone classification are not specified in our data - you must confirm these details with us before installation.
With a 17 mm² effective area and Cv 1.0, this 5/2 single solenoid valve suits double-acting cylinders of approximately O32-50 mm bore. The spring return means it needs a constant AC220V signal to stay actuated; removing power springs the spool back to its rest position.
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