AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W)
The AirTAC AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) is a genuine 5/2-way double solenoid (memory) solenoid valve with W ports and an effective area of 48.0 mm² (Cv 2.82). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
- Valve type5/2-way
- FunctionDouble solenoid (memory)
- Port sizeW
- Effective area48.0 mm²
- Flow (Cv)2.82
- Series4V400
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W)
The AirTAC 4V42015A-W is the 4V400 large-body 5/2-way valve built for moving double-acting cylinders and actuators in the O80-125 mm bore class. Its double-solenoid design is a memory valve: energise one coil to send the spool one way, pulse the other coil to send it back, and when power is cut the spool simply stays where it was last pulsed - held by land friction and balanced pressure, with no spring and no holding current. It is not magnetically latched. This -W variant is the external-pilot type: pilot air arrives through a separate external pilot port instead of being tapped internally, so the spool still shifts dependably on low main-line pressure or in vacuum / low-pressure circuits. Ports are 1/2" PT tapered.
Flow capacity sits at the top of the 4V family with an effective area of 48 mm2 (Cv 2.82) and a maximum frequency of 3 cycles per second. The AC220V coil draws 4.5 VA and is wired through a terminal box, and the whole valve weighs 720 g. Response time is 0.05 s or below, the aluminum-alloy body is rated IP65 (DIN40050), and the valve needs no lubrication, running on air filtered by a 40 um element at 0.15-0.8 MPa.
AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) Technical Specifications
| Model | AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) |
|---|---|
| Series | 4V400 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Double solenoid (memory) |
| Port size | W |
| Exhaust port | W |
| Effective area (Cv) | 48.0 mm² (Cv 2.82) |
| 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 | 3 cycle/sec |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | 720 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.
Flow & Coil Options
| Effective area | 48.0 mm² |
|---|---|
| Flow coefficient | Cv 2.82 |
| 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.
Model Code: AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W)
| 4V | Solenoid valve, spool type, 4-series. |
|---|---|
| 4 | Body size (4V400) — 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: 4V410 (single), 4V420 (double), 4V430C/E/P (5/3 center). Add the voltage suffix when ordering.
Where the AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) Is Used
Heavy clamping and press fixtures
Drives large O100-125 mm double-acting clamp and press cylinders; the memory function keeps the last commanded state through a power dip without holding current on the 4.5 VA AC220V coil.
Large material-handling grippers
The external pilot keeps spool switching crisp where main-line pressure runs low or on vacuum circuits, while Cv 2.82 feeds the airflow big bore cylinders demand.
Conveyor stops and lift platforms
Cycle diverters, stops and double-acting lift actuators up to 3 cycles per second with sub-0.05 s response; for suspended loads add a check valve or mechanical brake.
Is the AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) the Right Valve?
Choose this model when your circuit's supply pressure is low, vacuum-based or unstable - external piloting decouples spool shifting from main-line pressure. Stay within the 4V400 body when your double-acting cylinder is roughly O80-125 mm; drop to the 4V300 (Cv 1.65) for smaller bores, and note the 4V400 is the largest 4V body, so beyond its Cv 2.82 class you move to a bigger valve series or a manifold arrangement. If you need the cylinder to hold position mid-stroke instead of memorising two ends, step up to a 5/3 center type; for a stand-alone safety brake on a suspended load, add a pilot-operated check valve or mechanical brake regardless of valve choice.
When replacing, match all five points: body size (4V400), function (double solenoid 5/2 memory), port and thread (1/2", PT tapered - G or NPT variants exist), coil voltage (AC220V here), and electrical entry (terminal box, not the grommet lead-out).
Quick checklist
- ✓ Required flow (Cv) for cylinder & speed
- ✓ Function: single / double / 5-3 center
- ✓ Coil voltage (DC24 / AC220 …)
- ✓ Port thread (M5 / 1/8 / 1/4 / 3/8 / 1/2)
- ✓ Single valve or manifold base?
Installation & Wiring Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 0.8 MPa operating pressure.
- check Match coil voltage to your controller output.
- check Use the manual override to test before powering.
- check Fit silencers or fittings to the exhaust ports.
- check Wiring by qualified personnel per AirTAC docs.
AirTAC 4V420-15 Solenoid Valve, 4V400 Series (4V42015A-W) FAQ
With an effective area of 48 mm2 (Cv 2.82) on a 1/2" PT port, it is sized for double-acting cylinders and actuators of roughly O80-125 mm bore, switching up to 3 cycles per second. The -W suffix means pilot air is fed from a separate external pilot port rather than tapped internally from the main supply, so the spool still shifts reliably when main-line pressure is low or the circuit runs in vacuum or low-pressure service.
Nothing moves. As a double-solenoid memory valve, the spool stays in its last pulsed position through land friction and balanced pressure - there is no spring and no magnetic latch - so the cylinder ports remain as they were. That is position memory, not a certified brake: for suspended loads or any fall-protection duty, fit a pilot-operated check valve at the cylinder ports or a dedicated mechanical brake.
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Related AirTAC 4V Valves
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