AirTAC 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI)
The AirTAC AirTAC 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with 330C08BI 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 size330C08BI
- 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 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI)
The 4V330C-08BI is a 5/3-way double-solenoid pneumatic directional valve that directs compressed air to double-acting cylinders and actuators, with a closed center that blocks all ports when the spool is at rest. In this mid-position, both cylinder ports are sealed, so the actuator is held firmly in place—ideal for stopping a load at an intermediate point without drifting. This specific configuration ships with a DC24V coil drawing just 3.0 W and a pre-wired grommet entry with a 0.5 m flying lead, simplifying electrical hookup on DIN-rail panels.
Built on the 4V300 aluminum-alloy body, it provides an effective area of 21.3 mm² (Cv 1.25) and suits ~Ø50–80 mm double-acting cylinders. The spool shifts in 0.05 s or less, and the IP65 enclosure with class-B insulation keeps it reliable in dusty or washdown environments. The closed-center design means you can pause a press or clamp mid-cycle without needing a separate holding circuit.
AirTAC 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) Technical Specifications
| Model | AirTAC 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Closed center |
| Port size | 330C08BI |
| Exhaust port | 330C08BI |
| 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 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI)
| 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. |
| -330C08BI | 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 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) Is Used
Mid-Stroke Clamping
A fixture clamp needs to stop and hold a part at a precise intermediate position for a secondary operation. The 4V330C-08BI’s closed center blocks both cylinder ports, locking the clamp in place without air consumption or drift.
Vertical Lift Pause
On a vertical material lift, the load must pause halfway for an inspection step. The closed-center spool holds the cylinder piston securely at mid-stroke, preventing the load from sagging while the operator checks the part.
Pneumatic Press Control
A small assembly press uses a Ø63 mm cylinder to insert components. The 5/3 closed-center valve stops the ram at a set depth, holding pressure off the part while a sensor confirms insertion force before the cycle completes.
Is the AirTAC 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) the Right Valve?
Choose the 4V330C-08BI when your application requires a mid-stroke hold on a double-acting cylinder and you are wiring with a DC24V supply. The closed center blocks all flow at neutral, so the cylinder stays put—unlike the exhaust-center 4V330E variant that lets the cylinder float. If you are driving a smaller Ø32–40 mm cylinder, the 4V200 series (Cv 1.0) may be a better match; for bores above Ø100 mm, step up to the 4V400 body (Cv 2.82).
For a drop-in replacement, match five points: 4V300 body size, 5/3 closed-center function (30C), 1/4-inch port with PT thread, DC24V coil, and grommet electrical entry. This model can be mounted on a manifold base to build a compact valve terminal—just confirm your sub-base matches the 1/4-inch PT port pattern.
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 4V330C-08BI Solenoid Valve, 5/3-way, closed center, PT1/4, DC24V, grommet entry (4V330C08BI) FAQ
With an effective area of 21.3 mm² (Cv 1.25), it is sized for double-acting cylinders in the ~Ø50–80 mm range. It delivers a maximum frequency of 3 cycles per second, so it is suited for moderate-speed positioning rather than ultra-fast reciprocation.
The 4V330C is a double-solenoid valve with a memory spool—it stays in the last position it was pulsed to. If both solenoids are de-energized, the spring-centered spool returns to the closed mid-position, blocking all ports and holding the cylinder. For suspended loads, always add a pilot-operated check valve or mechanical brake as a safety backup.
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Related AirTAC 4V Valves
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