Airtac 4V300 Solenoid Valve 4V330E-08-A
The AirTAC Airtac 4V300 Solenoid Valve 4V330E-08-A is a genuine 5/3-way 5/3 double solenoid — exhaust center solenoid valve with A ports and an effective area of 21.3 mm² (Cv 1.25). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
- Valve type5/3-way
- Function5/3 double solenoid — Exhaust center
- Port sizeA
- Effective area21.3 mm²
- Flow (Cv)1.25
- Series4V300
About the Airtac 4V300 Solenoid Valve 4V330E-08-A
The AirTAC 4V330E-08A is a 5/3-way double-solenoid valve with an exhaust center, built on the 4V300 body. When both coils are de-energised, the spool shifts to its center position, blocking the inlet while connecting both cylinder ports to exhaust. This lets a double-acting cylinder float freely, which is useful when a load needs to be manually repositioned or when pressure must be completely removed from the actuator at rest.
This 1/4-inch PT-ported version comes with an AC220V coil drawing 4.5 VA and a standard terminal-box electrical entry. With an effective area of 21.3 mm² (Cv 1.25) and a maximum cycling speed of 3 cycles per second, it is well-matched to pneumatic systems driving bore sizes around 50 to 80 mm. The aluminium body weighs 450 g, responds in 0.05 seconds or less, and carries an IP65 protection rating.
Airtac 4V300 Solenoid Valve 4V330E-08-A Technical Specifications
| Model | Airtac 4V300 Solenoid Valve 4V330E-08-A |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Exhaust center |
| Port size | A |
| Exhaust port | A |
| Effective area (Cv) | 21.3 mm² (Cv 1.25) |
| 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 | 3 cycle/sec |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | 450 g |
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 | 21.3 mm² |
|---|---|
| Flow coefficient | Cv 1.25 |
| Response time | ≤ 0.05 s |
| Coil power | AC 4.5 VA · DC24V 3.0 W · DC12V 2.5 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 4V300 Solenoid Valve 4V330E-08-A
| 4V | Solenoid valve, spool type, 4-series. |
|---|---|
| 3 | Body size (4V300) — sets port & flow. |
| 3 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -A | Port thread: M5 / 06=1/8" / 08=1/4" / 10=3/8" / 15=1/2". |
Related: 4V310 (single), 4V320 (double), 4V330C/E/P (5/3 center). Add the voltage suffix when ordering.
Where the Airtac 4V300 Solenoid Valve 4V330E-08-A Is Used
Freewheel Conveyor Stops
In a powered-roller conveyor zone, the exhaust center allows a stop-gate cylinder to float, letting operators manually push packages through a stopped zone without fighting trapped air pressure.
Manual-Load Assembly Jigs
On a clamping fixture, de-energising the valve exhausts both sides of the clamp cylinder, so an operator can freely open or close the clamp by hand to load an oddly shaped part.
Sawmill Setworks
Controlling a positioning cylinder on a board edger, the exhaust center allows the sawyer to manually nudge the guide plate to a final position after the primary pneumatic stroke is complete.
Is the Airtac 4V300 Solenoid Valve 4V330E-08-A the Right Valve?
Choose the 4V330E-08A when your circuit needs a double-acting cylinder to go limp at center for safety or manual adjustment. The exhaust-center function is distinct from the closed-center (4V330C) which locks the cylinder, and the pressure-center (4V330P) which pressurises both sides. For smaller cylinders with a bore under 40 mm, stepping down to a 4V200-series valve (Cv 1.0) often provides a more responsive and economical match. If your actuator is larger than 80 mm, the 4V400 body (Cv 2.82) delivers the higher flow needed for acceptable stroking speed.
When replacing an existing valve, match five points exactly: the 4V300 body size, the 5/3 exhaust-center function (30E), the 1/4-inch port and PT thread, the AC220V coil voltage, and the terminal-box electrical entry. This valve can be mounted individually or ganged on a manifold base to build a compact, centralised valve terminal.
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 4V300 Solenoid Valve 4V330E-08-A FAQ
In the de-energised center position, the pressure port is blocked and both cylinder ports (A and B) are connected to the exhaust ports. This means no compressed air is trapped in the cylinder, allowing the piston rod to be moved freely by an external force—ideal for manual positioning or emergency-release scenarios.
Yes, the 'A' voltage code specifies an AC220V coil rated at 4.5 VA. It is designed for direct connection to a 220V 50/60 Hz supply via the terminal box. Ensure your control circuit can handle the inrush current of the AC solenoid, and always use the correct DIN-style connector for IP65 integrity.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard models usually ship in 3-4 days.
Fast Reply
Most inquiries answered within 7-8 hours.
Related AirTAC 4V Valves
Request a Quote for Airtac 4V300 Solenoid Valve 4V330E-08-A
Send us the quantity, coil voltage and destination. We confirm price, stock and lead time — usually within 7-8 hours.