The AirTAC Airtac 4V Solenoid Valves 4V21006AG-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 4V21006AG-W is a 5/2-way single-solenoid poppet-to-spool directional valve with the factory -W external-pilot option: pilot air is fed through a separate external port rather than tapped from the main supply, so the spool keeps switching reliably on low main-line pressure or in vacuum and low-pressure circuits. Energise the AC220V coil (4.5 VA) and air flows to one side of a double-acting cylinder while the other exhausts; cut the signal and the internal spring returns the spool to its rest position automatically.
Built on the 4V200 mid-size body, this valve offers an effective area of 17 mm2 (Cv 1.0), a maximum cycling rate of 5 cycles per second and an activating time of 0.05 s or less, which suits it to double-acting cylinders and actuators in the ~O32-50 mm bore range. The G-thread ports are BSPP parallel at 1/8", coil power is 4.5 VA at AC220V, weight is 220 g, and wiring is made through the terminal box. The aluminium body carries an IP65 (DIN40050) rating and needs no lubrication.
| Model | Airtac 4V Solenoid Valves 4V21006AG-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.
Drives double-acting punch, press and insert cylinders up to ~O50 mm with a crisp <=0.05 s response, the spring return giving a known home position every cycle.
The external-pilot -W design keeps the spool shifting even when main-line pressure is low or the process runs under vacuum, where an internally piloted valve would stick.
With Cv 1.0 flow and 5 c/s cycling it handles clamp-and-push motions on packaging and handling lines, the 220 g body mounting singly or on a shared manifold base.
Size this valve when your cylinder needs roughly Cv 1.0. For a compact bore or slow, light-duty motion the 4V100 (Cv 0.6) is the more economical step down; for larger bores or faster cycles move up to the 4V300 (Cv 1.65). Choose function 10 (this model) where you want a predictable spring-return rest state, function 20 when the actuator must remember its last pulsed position, or a 30C/30E/30P 5/3 variant when a defined center condition is required - note 5/3 versions flow less (13.6 mm2, Cv 0.8) and cycle at 3 c/s.
One 4V21006AG-W can be panel- or bracket-mounted individually, or stacked on a base to form an integrated manifold group that shares one supply and simplifies piping. When replacing an existing unit, match all five points: body size 4V200, function 10, 1/8" port with G thread, AC220V coil, and terminal electrical entry - plus this -W external-pilot version if your circuit feeds the pilot separately.
Quick checklist
Its 17 mm2 effective area (Cv 1.0) is a good match for double-acting cylinders in the ~O32-50 mm range at moderate cycle speeds. It is a 5/2-way valve, so it pressurises one cylinder side while exhausting the other - it is not intended for single-acting cylinders, which need a 3/2-way valve. For larger bores or faster travel, step up to the 4V300 (Cv 1.65).
The -W option feeds pilot air from a separate external port instead of the main line. The spool therefore switches dependably even when supply pressure is low, unstable, or when the circuit operates under vacuum - conditions where an internally piloted valve can fail to shift. Piping is slightly more involved because you must connect the pilot port, but switching reliability is the payoff. This unit is the AC220V (4.5 VA) coil with terminal-box entry and G (BSPP) 1/8" ports.
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