Airtac 4V300 Solenoid Valve 4V330C-08-B
The AirTAC Airtac 4V300 Solenoid Valve 4V330C-08-B is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with B 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 — Closed center
- Port sizeB
- Effective area21.3 mm²
- Flow (Cv)1.25
- Series4V300
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac 4V300 Solenoid Valve 4V330C-08-B
The AirTAC 4V330C-08B is a 5/3-way double-solenoid pneumatic directional valve that directs compressed air to double-acting cylinders and actuators. In its de-energized center position, all ports are blocked, which holds the cylinder in place—ideal for mid-stroke stops where drift must be minimized. This specific model is configured with a DC24V coil drawing just 3.0 W and a standard terminal box electrical entry.
Built on the 4V300 aluminum-alloy body, it delivers an effective area of 21.3 mm² (Cv 1.25) and can cycle at up to 3 times per second. The spool shifts in 0.05 seconds or less, making it responsive enough for most industrial sequencing tasks. With 1/4-inch PT ports, it suits double-acting cylinders in the ~50-80 mm bore range, and its IP65-rated enclosure ensures reliable operation in dusty or wet plant environments.
Airtac 4V300 Solenoid Valve 4V330C-08-B Technical Specifications
| Model | Airtac 4V300 Solenoid Valve 4V330C-08-B |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Closed center |
| Port size | B |
| Exhaust port | B |
| 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 4V330C-08-B
| 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. |
| -B | 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 4V330C-08-B Is Used
Precision Clamping & Fixturing
The closed-center function holds clamp cylinders firmly in position when the valve is de-energized, preventing workpiece movement during machining or assembly operations.
Material Stop & Transfer
Use the 4V330C-08B to control stop-gate actuators on conveyor lines. The blocked center holds the gate in place at mid-stroke, allowing precise product spacing without air consumption.
Intermediate Positioning
Ideal for press or forming applications where the ram needs to pause at a specific height. The 5/3 closed center holds the cylinder against moderate external forces while the control system dwells.
Is the Airtac 4V300 Solenoid Valve 4V330C-08-B the Right Valve?
Choose the 4V330C-08B when your application requires a 5/3 closed-center function with a 1/4-inch port size and 24 V DC power. The closed center is the go-to choice for stopping a cylinder mid-stroke and holding position when the valves are de-energized, though for safety-critical suspended loads you should add a pilot-operated check valve at the cylinder ports. If your cylinder bore is below 40 mm, consider stepping down to the 4V200 series for better economy; for bores above 100 mm, the 4V400 series with its larger Cv of 2.82 will give you faster cylinder speeds.
When replacing an existing valve, match five points: the 4V300 body size, the 5/3 closed-center function (30C), the 1/4-inch port size, a DC24V coil, and the terminal-box electrical entry. This model uses PT (Rc) tapered threads—verify your plumbing matches before ordering.
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 4V330C-08-B FAQ
With an effective area of 21.3 mm² (Cv 1.25), this valve is well-matched to double-acting cylinders in the ~50-80 mm bore range for typical industrial speeds. It can drive smaller cylinders very quickly, but for larger bores above 100 mm you will get faster performance by moving up to the 4V400 series.
When both solenoids are de-energized, the spool moves to the center position where pressure, exhaust, and cylinder ports are all blocked. This traps air on both sides of the piston to hold it in place. It resists motion from moderate external forces, but it is not a safety-rated holding device—for suspended or vertical loads, always install a mechanical brake or pilot-operated check valve.
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Related AirTAC 4V Valves
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