The AirTAC Airtac 4V Solenoid Valves 4V12006FIT-W is a genuine 5/2-way double solenoid (memory) solenoid valve with W ports and an effective area of 10.2 mm² (Cv 0.6). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
The AirTAC 4V120-06FIT-W is a 5/2-way double solenoid valve built on the compact 4V100 body, sized with an effective area of 10.2 mm2 (Cv 0.6) to direct compressed air to double-acting cylinders and actuators in roughly the O16-32 mm bore range. Its -W external-pilot build is the defining feature: pilot air is supplied through a dedicated external port rather than being tapped internally from the main line, so the spool keeps switching dependably on low-pressure main supply or in vacuum-side circuits.
Because both solenoid positions are momentary, the valve is a memory type: pulse one coil and the spool stays where it was last set, held by land friction and balanced pressures with no spring and no holding current. Switching response is 0.05 s or better, the DC12V coil draws only 2.5 W, and the whole unit weighs 175 g. This exact SKU pairs that low-voltage coil with a grommet entry providing a 0.5 m pre-wired lead for quick drop-in connection, and NPT 1/8in tapered ports for North American fitting standards.
| Model | Airtac 4V Solenoid Valves 4V12006FIT-W |
|---|---|
| Series | 4V100 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Double solenoid (memory) |
| Port size | W |
| Exhaust port | W |
| Effective area (Cv) | 10.2 mm² (Cv 0.6) |
| 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 | 5 cycle/sec |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | 175 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 | 10.2 mm² |
|---|---|
| Flow coefficient | Cv 0.6 |
| Response time | ≤ 0.05 s |
| Coil power | AC 3.5 VA · DC24V 2.8 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. |
|---|---|
| 1 | Body size (4V100) — sets port & flow. |
| 2 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -W | Port thread: M5 / 06=1/8" / 08=1/4" / 10=3/8" / 15=1/2". |
Related: 4V110 (single), 4V120 (double), 4V130C/E/P (5/3 center). Add the voltage suffix when ordering.
The Cv 0.6 flow class and springless memory action suit compact double-acting clamp cylinders that must keep their position between pulses on low-supply fixtures.
External pilot supply makes this valve a fit for vacuum-assist and reduced-pressure circuits where internally piloted valves fail to shift reliably.
A 12 V grommet-wired valve weighing 175 g integrates neatly into compact educational and prototype machines fed from small DC supplies.
Choose this model when your main-line pressure can dip or run at low levels - the external pilot keeps actuation crisp where an internally piloted valve would hesitate. For double-acting cylinders above the O16-32 mm class, or cycles that need more speed, step up to the 4V200 series (Cv 1.0); stay on the 4V100 when space and light duty favour it. If your machine must stop mid-stroke on a signal loss, move to a 5/3 center variant instead of a 5/2 memory valve.
Mounting on a common base lets this valve join an integrated manifold group, saving plumbing on multi-valve machines. When replacing, verify all five points: 4V100 body, function 20 (double solenoid), 1/8in port with NPT thread, DC12V coil, and grommet electrical entry - plus the -W external-pilot option.
Quick checklist
Instead of bleeding pilot air from inside the valve, the -W build takes pilot pressure from a separate external port. That keeps shifting action consistent when the main line runs at low pressure or in vacuum and low-pressure circuits, since pilot supply and main flow are independent. Pilot air still comes from a clean, 40 um-filtered source.
As a double-solenoid 5/2 valve it holds the last commanded position without drawing current - the spool simply stays put by friction and pressure balance, with no magnet or spring involved. For suspended or fall-hazard loads this is not a certified brake; add a pilot-operated check valve at the cylinder ports or a mechanical brake where guaranteed holding is required.
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