The AirTAC Airtac 4V Solenoid Valves 4V21006C-W is a genuine 5/2-way single solenoid (spring return) solenoid valve with W ports and an effective area of 17.0 mm² (Cv 1.0). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
The AirTAC 4V21006C-W is a 5/2-way single-solenoid valve in the compact 4V200 family, configured with a 1/8in PT port and an AC110V coil drawing 4.5 VA on a plain terminal-box entry. The solenoid shifts the spool one way while an internal spring snaps it back the moment power is cut, so your circuit must keep the coil energised for as long as the cylinder has to stay extended. It routes air to and from double-acting cylinders and rotary actuators. Flow sits at the head of the mid-body class: 17.0 mm2 effective area, Cv 1.0, and cycling up to 5 times per second. Response is 0.05 s or better, and at 220 g this is the lightest 4V200 body, which matters when the valve rides on a moving gantry or a small machine plate. It is a natural match for bore sizes of roughly Dia 32-50 mm. Operating window is 0.15-0.8 MPa with 1.2 MPa proof pressure, IP65 housing, and no lubrication needed upstream beyond 40 um filtration.
| Model | Airtac 4V Solenoid Valves 4V21006C-W |
|---|---|
| Series | 4V200 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | W |
| Exhaust port | W |
| Effective area (Cv) | 17.0 mm² (Cv 1.0) |
| 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 | 220 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 | 17.0 mm² |
|---|---|
| Flow coefficient | Cv 1.0 |
| 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. |
|---|---|
| 2 | Body size (4V200) — sets port & flow. |
| 1 | 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: 4V210 (single), 4V220 (double), 4V230C/E/P (5/3 center). Add the voltage suffix when ordering.
A short-stroke Dia 40 mm pusher (about 6.3 kgf at 0.5 MPa) kicks mislabelled cartons off a belt. Cv 1.0 through the 1/8in port clears the stroke fast, and spring return pulls the pusher clear automatically if the PLC output drops.
A double-acting swing clamp holding a machined block stays clamped only while the AC110V coil is energised; de-energising opens the fixture by spring, a fail-safe pattern operators like on manual load stations.
A Dia 32 mm double-acting dosing cylinder (around 4 kgf push at 0.5 MPa) dispenses repeatable shots. The <=0.05 s response keeps shot timing tight at up to 5 cycles per second, and the 220 g valve mounts straight to the bench frame.
Sizing runs in both directions from this valve. Step down to the 4V100 (Cv 0.6) if your cylinder is a small Dia 20-25 mm unit pushing around 2.5-4 kgf at 0.5 MPa, since the larger 1/8in port buys nothing there. Step up to the 4V300 (Cv 1.65) once you exceed Dia 50 mm bores - a Dia 63 mm cylinder develops about 15.6 kgf push at 0.5 MPa and will cycle noticeably faster on the bigger body. Stay with this 4V200/Cv 1.0 size for Dia 32-50 mm double-acting work. Choosing between single and double solenoid is a control question: pick this 10 version when a lost signal must retract the actuator, pick a 20 double-solenoid if you need position memory instead. A single valve on individual ports suits one-off machines; bolt several onto a 4V200 manifold base when a machine controls five or six cylinders from one supply. For replacement, match five points exactly: 4V200 body, function digit 10, port and thread (1/8in, PT here), coil voltage (AC110V), and entry style (terminal box).
Quick checklist
Flow class: 17.0 mm2 effective area, Cv 1.0, with a maximum frequency of 5 cycles per second on this 5/2 version. Response (activating) time is 0.05 s or less. Working pressure runs 0.15-0.8 MPa with 1.2 MPa proof pressure. The AC110V coil consumes 4.5 VA, protection is IP65 (DIN40050), insulation class B, and the valve weighs 220 g. Air must be filtered to 40 um and no lubrication is required.
Yes - that is exactly how a single-solenoid spring-return valve behaves. Energising the AC110V coil shifts the spool and extends the double-acting cylinder; the spring shifts it back as soon as power is cut, exhausting the cylinder's far side. If your process instead needs the cylinder to stay put through a power outage, that calls for the double-solenoid memory version (4V220) rather than this model - and for suspended loads, add a pilot-operated check valve at the ports as well.
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