The AirTAC Airtac 4V Solenoid Valves 4V220-08AT is a genuine 5/2-way double solenoid (memory) solenoid valve with 08AT 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 4V220-08AT is a 5/2-way double-solenoid directional valve from the AirTAC 4V200 series, configured with 1/4-inch NPT ports and a 220 V AC coil in a terminal-box entry. It directs compressed air to both sides of a double-acting cylinder or rotary actuator, and its memory spool holds the last pulsed position without consuming holding current—ideal for circuits where the valve state must survive a control-power dropout.
With an effective area of 17.0 mm² (Cv 1.0) and a maximum cycling rate of 5 cycles per second, this 320 g aluminum-body valve suits ~O32-50 mm bore cylinders. The AC220V coil draws 4.5 VA, and the sliding-column spool responds in 0.05 s or less. IP65-rated and fitted with a locking manual override, it can be mounted individually or on a manifold base.
| Model | Airtac 4V Solenoid Valves 4V220-08AT |
|---|---|
| Series | 4V200 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Double solenoid (memory) |
| Port size | 08AT |
| Exhaust port | 08AT |
| 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 | 320 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. |
| 2 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -08AT | 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.
The memory spool holds a clamp or pusher in its last position during a conveyor stop or power cycle, preventing product shift without needing a continuous holding signal.
Drives double-acting grippers and linear slides on semi-automatic assembly stations. The NPT ports and AC220V supply suit North American machine builds.
Combine multiple 4V220-08AT units on a common 4V200 manifold base to centralise pneumatic control for multi-axis fixtures, reducing tubing and wiring clutter.
Choose the 4V220-08AT when you need a 1/4-inch NPT double 5/2 valve that holds position on power loss without a spring return. If your cylinder is below O25 mm, stepping down to the 4V100 series (Cv 0.6) often saves space; for bores above O50 mm or faster cycle times, the 4V300 (Cv 1.65) provides the extra flow margin. The double-solenoid memory function is preferred when the valve must stay in its last commanded state through an E-stop or power cycle, but always pair it with a mechanical brake or pilot-operated check valve if the application involves a suspended load.
When replacing an existing valve, match five points: 4V200 body size, 5/2 double-solenoid function (code 20), 1/4-inch NPT thread, AC220V coil voltage, and terminal-box electrical entry. The 4V220-08AT drops into manifold stations built for the 4V200 family, simplifying multi-valve upgrades.
Quick checklist
With an effective area of 17.0 mm² (Cv 1.0), it suits double-acting cylinders in the ~O32-50 mm range for general industrial speeds. Smaller bores will cycle very fast; larger bores may need the higher Cv of a 4V300 series valve.
The spool stays in its last pulsed position without current, but this is a directional hold, not a safety-rated load brake. For vertical or suspended loads, add a pilot-operated check valve or a mechanical brake at the cylinder ports to prevent drift.
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