The AirTAC Airtac 4V Solenoid Valves 4V21006BT-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 4V21006BT-W is a 4V200-body, single-solenoid 5/2 valve fitted with 1/8in NPT ports and a DC24V coil that draws only 3.0 W, so it drops straight into a 24 V control panel without extra power budget. It routes compressed air to double-acting cylinders: energising the solenoid shifts the spool one way, and an internal spring snaps the spool back the instant power is removed, so a constant electrical signal is required to hold the working position. With an effective area of 17.0 mm2 (Cv 1.0) it belongs to the mid-flow class that suits ~O32-50 mm bores. Response is 0.05 s or better and the spool cycles up to 5 times per second, plenty for small pick-and-place and clamp duties. The 220 g aluminum-alloy body is rated IP65 (DIN40050) with class B insulation, a locking or non-locking manual override for setup and fault-finding, and lubrication-free running behind a 40 um filter element. Terminals sit in an open terminal box, and the valve can bolt onto a base to form an integrated manifold group.
| Model | Airtac 4V Solenoid Valves 4V21006BT-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 compact O32 double-acting slide cylinder shuttling circuit boards between nests is well matched to Cv 1.0, and the 5 cycles/s ceiling keeps pace with a typical pick-and-place takt. The spring-return design retracts the gripper arm every time the 24 V signal drops, clearing the work zone automatically.
Pushing folded top flaps down before gluing takes a short, punchy stroke - an O40 double-acting cylinder gives about 64 kgf of push at 0.5 MPa, comfortably within this valve's 17.0 mm2 effective area. The 0.05 s response makes the tuck crisp at line speeds up to 5 strokes per second.
An O50 double-acting swing clamp develops around 100 kgf of push at 0.5 MPa, a good fit for this mid-body valve. Because the spool is spring returned, a power cut or emergency stop vents the clamp side and releases the part, and the manual override lets an operator jog the clamp during setup.
Size against your bore and cycle rate. Step down to the 4V100 (Cv 0.6) if the load is a small O32 cylinder - roughly 41 kgf of push at 0.5 MPa - running slowly, since the extra flow would be wasted. Step up to the 4V300 (Cv 1.65) for an O63 bore (about 160 kgf at 0.5 MPa) or when stroke speed matters more than cost. On function: this 10 code is spring return and retracts safely on power loss; choose function 20 if the actuator must remember its last pulsed position, or a 30x 5/3 type to stop a cylinder mid-stroke. For a one-for-one replacement, match five points: 4V200 body, function 10, 1/8in port with NPT thread, DC24V coil, and terminal-box entry.
Quick checklist
Effective area 17.0 mm2 (Cv 1.0), max frequency 5 cycles/s, response 0.05 s or less, operating pressure 0.15-0.8 MPa with 1.2 MPa proof pressure, media temperature -20 to +70 C. The DC24V coil consumes 3.0 W, the valve weighs 220 g, and it is IP65 (DIN40050). Air must be filtered to 40 um and no lubrication is needed. This 4V200-body size suits ~O32-50 mm double-acting cylinders.
Function 10 is a single-solenoid 5/2 with a mechanical return spring: the spool only stays shifted while the coil is energised, so removing the 24 V signal always drives the valve back to its rest position - ideal for fail-safe retract or unclamp. The DC24V coil at 3.0 W suits low-voltage control circuits and battery or PLC outputs, wiring is made in the terminal box, and the NPT thread matches North American tapered piping. If your spec needs a valve that holds its last position instead, move to a function 20 double-solenoid model in the same body.
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