The AirTAC Airtac 4V Solenoid Valves 4V330C10BT is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with 330C10BT 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.
The AirTAC 4V330C-10BT is a 5/3-way closed-center solenoid valve with a 3.0 W DC24V coil wired to a terminal box and NPT 3/8in tapered ports. Two solenoids pulse the spool between the two working positions; with both coils de-energised, every port is blocked, so a double-acting cylinder stops where it is and waits for the next command. Flow capacity is Cv 1.25 with an effective area of 21.3 mm2, and each shift completes in 0.05 s or less. This flow class suits double-acting cylinders in the ~Dia50-80 mm range. The valve weighs 450 g, runs on 0.15-0.8 MPa of air filtered by a 40 um element, and carries IP65 protection. Because a spool valve is not a certified load-holding device, add a pilot-operated check valve at the cylinder ports or a mechanical brake whenever the load hangs on the valve holding it.
| Model | Airtac 4V Solenoid Valves 4V330C10BT |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Closed center |
| Port size | 330C10BT |
| Exhaust port | 330C10BT |
| 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.
| 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.
| 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. |
| -330C10BT | 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.
A Dia63 bore on a machining-center fixture develops about 160 kgf push at 0.5 MPa; closed center blocks all ports and freezes the clamp mid-stroke the moment cycle stop is pressed.
Cycles a Dia80 press ram pushing roughly 256 kgf at 0.5 MPa, holding a controlled neutral pause between strokes at up to 3 cycles per second.
Stops a Dia63 rack-and-pinion index table dead at center so the vision camera can check the part; the DC24V 3.0 W coil suits PLC transistor outputs without interposing relays.
Size in both directions: if your bore is Dia50 or smaller (about 100 kgf push at 0.5 MPa), the 4V200 body at Cv 1.0 is enough and saves money. Above Dia80 a Dia80 bore pushes roughly 256 kgf at 0.5 MPa, and the 4V400 body at Cv 2.82 cycles it faster than the 4V300 cap of 3 cycles per second. Pick closed center to freeze a cylinder in position, the 4V330E exhaust center to let it float, the 4V330P pressure center to push from both sides, or the 5/2 4V320 when no neutral is needed. Mount one valve on a foot bracket or build a manifold base group so several stations share one air supply. For a like-for-like replacement match five points: 4V300 body, function code 30C, 3/8in port with NPT thread, DC24V coil, terminal-box entry. The T suffix means an NPT taper that seals on the thread itself; a G (BSPP parallel) or PT machine needs a different fitting family, so never mix threads on one manifold.
Quick checklist
It is built for double-acting cylinders and actuators in the ~Dia50-80 mm range. Key figures in one place: Cv 1.25, effective area 21.3 mm2, response time 0.05 s or less, operating pressure 0.15-0.8 MPa (proof 1.2 MPa), max 3 cycles per second, DC24V coil at 3.0 W, weight 450 g. On a Dia63 cylinder that works out to about 160 kgf push at 0.5 MPa, about 143 kgf pull at 0.5 MPa, about 222 kgf push at 0.7 MPa, and a maximum of roughly 222 kgf.
Closed center (30C) blocks the supply, both cylinder ports and the exhausts at neutral, so a double-acting cylinder parks exactly where it was. Exhaust center (30E) vents both ports, letting the cylinder float by hand, while pressure center (30P) feeds both sides, which suits countersinking or down-force drilling. If the load must never drop, remember the closed center alone is not a safety brake: fit a pilot-operated check valve at the ports or a mechanical brake as backup.
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