Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A
The AirTAC Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A is a genuine 5/2-way solenoid valve solenoid valve with 32008A 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 size32008A
- Effective areaSee datasheet
- Flow (Cv)—
- Series4V
About the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A
The B03-4V32008A is AirTAC's explosion-proof build of the popular 4V320-08A, designed for environments where flammable gases, vapors, or dust may be present. It is a 5/2-way double solenoid valve with memory function, meaning it holds its last pulsed position without needing a continuous signal, making it ideal for automated control circuits where power interruptions must not reset the actuator. The valve directs compressed air to double-acting cylinders and actuators, with a robust aluminum-alloy body and IP65 protection.
This model features a 1/4" PT tapered port and an AC220V coil rated at 4.5VA. It delivers an effective area of 28 mm² (Cv 1.65), supporting cylinder bores from approximately 50 to 80 mm. The spool-type design responds in 0.05 seconds or less, and the valve operates without lubrication, simplifying maintenance. The B03- prefix indicates the explosion-proof variant, but please confirm the exact protection rating and certification for your specific zone with us before ordering.
Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A Technical Specifications
| Model | Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A |
|---|---|
| Series | 4V solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Solenoid valve |
| Port size | 32008A |
| Exhaust port | 32008A |
| 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 B03-4V32008A
| 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. |
| -32008A | 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 B03-4V32008A Is Used
Hazardous Process Lines
Controls double-acting actuators in chemical or petrochemical plants where flammable vapors may be present, leveraging the explosion-proof build to operate safely.
Automated Press Controls
Drives the clamping cylinders on presses in solvent-rich finishing areas, with the memory function holding the clamp position during brief power dips.
Machine Tool Spindle Clamps
Operates spindle-locking cylinders on CNC machines in machining shops with coolant mist, providing reliable 5/2 control with a compact 1/4" port.
Is the Airtac B03-4V Explosion-Proof Solenoid Valve B03-4V32008A the Right Valve?
Choose the B03-4V32008A when your application requires a 5/2 double solenoid valve with memory hold and explosion-proof construction for a hazardous area. The 1/4" port and Cv 1.65 suit medium-bore cylinders (approximately 50-80 mm). If your cylinder is smaller, the 4V200 series (Cv 1.0) may be more economical; for larger bores, step up to the 4V400 series (Cv 2.82).
For replacement, verify the body size (4V300), function (5/2 double), port and thread (1/4" PT), coil voltage (AC220V), and electrical entry (terminal box). The double solenoid design is ideal for applications where the valve must retain its state during a power loss, but remember it is not a safety brake-use a mechanical lock or pilot-operated check valve for load holding.
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 B03-4V32008A FAQ
The B03- prefix marks the explosion-proof version of the base 4V320-08A model. It shares the same 5/2 double solenoid function, 1/4" PT port, AC220V coil, and performance specs (Cv 1.65, 28 mm² effective area). The B03- build is intended for hazardous/flammable atmospheres, but you must confirm the exact protection rating and certification for your zone with us, as we do not list specific Ex markings.
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 required. This means the valve retains its state even if power is lost, but it is not a safety brake. For suspended loads, add a mechanical brake or pilot-operated check valve at the cylinder ports.
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