The AirTAC Airtac 4V Solenoid Valves 4V330C10FT is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with 330C10FT 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 4V330C-10FT is a 5/3-way double-solenoid valve in the AirTAC 4V300 body, built as a closed-center version: at the center position all five ports are blocked, so a double-acting cylinder freezes exactly where it stands until the next pulse arrives. Each solenoid shifts the spool when pulsed, and because the spool stays put without either coil energised, the valve draws no holding current between moves. This exact SKU pairs the 3/8in NPT (National Pipe Taper) work ports with a DC12V coil drawing only 2.5 W, wired through a terminal box - a combination that suits battery-fed circuits and North American pipework. Flow sits at Cv 1.25 (21.3 mm2 effective area), sized for roughly Dia50-80 mm bores, and the spool responds in 0.05 s or less. Body weight is 450 g.
| Model | Airtac 4V Solenoid Valves 4V330C10FT |
|---|---|
| Series | 4V300 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Closed center |
| Port size | 330C10FT |
| Exhaust port | 330C10FT |
| 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. |
| -330C10FT | 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.
On a machining-center fixture with Dia63 mm clamp cylinders, the closed center parks the clamps mid-stroke between cycles without energising either 2.5 W coil, so a power dip cannot drop the clamps.
The DC12V coil at 2.5 W runs straight off a forklift-truck or AGV battery bank, and the terminal box accepts the vehicle loom; Cv 1.25 is enough for the Dia50-80 mm lift and steer cylinders such carts carry.
NPT threads drop the valve into US-spec subplates and hard piping without adapter bushes; the 3/8in work ports with 1/4in exhaust match the gauge and ejector circuits found on older US packaging machines.
Size by bore first. If your cylinder is around Dia32-50 mm, the 4V200 body at Cv 1.0 will drive it with less cost and space; if you are moving Dia100 mm or larger pistons, step up to the 4V400 at Cv 2.82 so retract speed does not sag. Stay on 4V300 when the bore falls in the Dia50-80 mm band and you need the center-stop behaviour. Within the 4V300 family, choose 30E if the cylinder should float freely at center, or 30P if both chambers should stay pressurised - the 30C here is the hold-in-place option. Before ordering, match all five points against your old tag: body size (4V300), function (30C closed center), port and thread (3/8in NPT, 1/4in exhaust), coil voltage (DC12V at 2.5 W), and electrical entry (terminal box, not the grommet lead). Single valves mount directly; for multi-valve stations ask for the manifold base that turns several 4V300 units into one plumbed group.
Quick checklist
It switches compressed air to double-acting cylinders and actuators in the ~Dia50-80 mm bore class. Full figures: Cv 1.25 with 21.3 mm2 effective area, maximum cycling 3 per second, response 0.05 s or faster, operating pressure 0.15-0.8 MPa (proof 1.2 MPa), DC12V coil at 2.5 W, terminal-box entry, NPT 3/8in work ports with 1/4in exhaust, aluminium body weighing 450 g, IP65 protection.
All five ports block, so the cylinder chambers are sealed and the piston stops where it was. That holds position against drift and light reaction forces, but it is a directional valve, not a certified brake: for a suspended or fall-hazard load, add pilot-operated check valves at the cylinder ports or a mechanical brake as backup.
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