The AirTAC Airtac 4V Solenoid Valves 4V42015CG is a genuine 5/2-way double solenoid (memory) solenoid valve with 42015CG 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.
The 4V420-15CG is AirTAC's largest-body double-solenoid 5/2 directional valve, built here with a 1/2in G (BSPP parallel) port and an AC110V coil wired to a terminal box. Because it is a memory valve, not a spring-return one: pulse one coil, and the spool stays in that position after power is removed, held simply by land friction and balanced pressure with no spring and no holding current. A short pulse on the opposite coil shifts it back. With an effective area of 48.0 mm2 (Cv 2.82) it moves enough air for double-acting cylinders of roughly Dia 80 to 125 mm bore, and the activating response is 0.05 s or better, so fast reversal on big rams is realistic. The aluminum body weighs 720 g, the AC110V coil draws 4.5 VA, and the IP65 terminal box keeps wiring tidy in cabinets and junction-box-fed machines. A genuine AirTAC unit, verified against the datasheet before quotation.
| Model | Airtac 4V Solenoid Valves 4V42015CG |
|---|---|
| Series | 4V400 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Double solenoid (memory) |
| Port size | 42015CG |
| Exhaust port | 42015CG |
| 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.
| 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.
| 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. |
| -42015CG | 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.
Packaging machines that square and fold corrugated cases run Dia 100 mm flap cylinders; a pulsed 4V420 holds the flap position between cartons without keeping the AC110V coil energised, trimming coil heat on multi-hour shifts.
A Dia 125 mm platform-tilt cylinder pulls around 613 kgf at 0.5 MPa, and this valve's Cv 2.82 flow class fills that bore fast enough for a snappy deck cycle; note a suspended platform still needs a pilot-operated check valve or mechanical lock for guaranteed holding.
Gate cylinders that stop glass bottles on a conveyor benefit from the 0.05 s response and 3 cycle/s limit; the memory function lets the PLC pulse the valve once per batch pattern instead of driving the coil continuously.
Size downward when the bore drops: below roughly Dia 80 mm the 4V300 body (Cv 1.65) is usually the better match, saving cost and air. Upward there is no bigger 4V body - the 4V400 is the top of the range - so for still larger flow step to a bigger AirTAC valve series or split the load across an integrated manifold group on a common base. A Dia 125 mm bore pushes about 613 kgf at 0.5 MPa and a Dia 80 mm bore about 251 kgf; both sit comfortably in this valve's 48.0 mm2 flow class. Before ordering a replacement, match all five points: body size (4V400), function (20, double solenoid memory), port and thread (1/2in, G here - PT or NPT variants exist), coil voltage (AC110V on this SKU), and electrical entry (terminal box, not the grommet lead).
Quick checklist
It is a 5/2 double-solenoid valve for double-acting cylinders and actuators. Full figure set: effective area 48.0 mm2 (Cv 2.82), max frequency 3 cycle/s, activating response 0.05 s or below, operating pressure 0.15-0.8 MPa (proof 1.2 MPa), air filtered to 40 um, AC110V coil at 4.5 VA, weight 720 g. That flow class suits bores of roughly Dia 80 to 125 mm.
Yes - the spool simply stays wherever it was last pulsed, held by land friction and balanced pressure; there is no spring and no latching magnet doing the work. This is a positional memory, not a certified safety function: for a suspended or fall-risk load, add a pilot-operated check valve at the cylinder ports or a mechanical brake so holding never depends on the valve alone.
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