The AirTAC Airtac 4V Solenoid Valves 4V41015AG is a genuine 5/2-way single solenoid (spring return) solenoid valve with 41015AG 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 4V410-15AG is the single-solenoid, spring-return member of AirTAC's largest 4V body, built with 1/2 inch G (BSPP parallel) ports and an AC220V coil drawing 4.5 VA. It is a 5/2-way directional valve for double-acting cylinders and actuators: energise the coil and air flows to one cylinder port while the other exhausts; cut power and the internal spring snaps the spool back, reversing the stroke automatically. Because the return is mechanical, the cylinder always finishes in the same rest position after a power loss - a predictable fail position for presses and clamp arms. Flow capacity sits at the top of the 4V range with an effective area of 48.0 mm2 (Cv 2.82), so it suits roughly Dia 80-125 mm bores, and the spool switches in 0.05 s or less at up to 3 cycles per second. Wiring is straightforward: the coil lands in a terminal box (no flying leads to dress), the housing is IP65 (DIN40050) against washdown dust and spray, and the whole valve weighs just 590 g. Air must be filtered by a 40 um element, operating pressure is 0.15-0.8 MPa, and lubrication is not required.
| Model | Airtac 4V Solenoid Valves 4V41015AG |
|---|---|
| Series | 4V400 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 41015AG |
| Exhaust port | 41015AG |
| 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 | 590 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. |
| 1 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -41015AG | 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.
A pusher cylinder sweeping cartons onto a conveyor needs brisk extension and an automatic retract. Cv 2.82 plus a 0.05 s response keeps the sweep inside a 3 cycles-per-second rhythm, and the spring return clears the lane the moment the coil drops out.
Clamping timber before a cut calls for real flow: a Dia 125 bore develops roughly 6.1 kN (about 626 kgf) at 0.5 MPa, and this 1/2 inch valve fills and vents it without starving. If power fails mid-cycle, the spring drives the spool to its rest position on its own.
Block-plant ejectors run in dusty, wet conditions around the clock. The IP65 terminal-box housing, 0.15-0.8 MPa operating band and oil-free operation let the valve sit directly on the mold frame, grouped with neighbours on a common manifold base.
Size down when the cylinder is small: a 4V300 body (Cv 1.65) is the correct, cheaper step for bores below about Dia 80 mm - a Dia 63 bore pushing around 1.6 kN at 0.5 MPa does not need this valve's flow. Size up by looking at the workload: 4V400 is the largest 4V body, so if a Dia 125 cylinder (about 6.1 kN push at 0.5 MPa, roughly 626 kgf) cycles fast or you need more than Cv 2.82, move to a larger AirTAC valve series or build a parallel manifold group on a base. A single solenoid with spring return is the right choice when the cylinder must retreat on signal loss; use a 4V420 double solenoid if the stroke must hold mid-position on power failure, or a 4V430C/E/P 5/3 if a true center condition is needed. For a like-for-like replacement match five points: body size 4V400, function 10 (single solenoid, 5/2), port and thread (1/2 inch, G here - PT blank or T for NPT were the other options), coil voltage (AC220V), and electrical entry (terminal box; the I suffix would mean a grommet lead).
Quick checklist
Flow: effective area 48.0 mm2, Cv 2.82, with a maximum switching frequency of 3 cycles per second. Response (activating) time: 0.05 s or less. Pressure: 0.15-0.8 MPa operating, 1.2 MPa proof. Electrical: AC220V coil at 4.5 VA, insulation class B, IP65 (DIN40050), terminal-box entry. Mechanical: 1/2 inch G (BSPP) ports, 590 g weight, air filtered by a 40 um element, no lubrication needed.
That is the spring return doing its job, not a fault. A single-solenoid 5/2 valve moves the cylinder only while the coil stays energised; the instant power is interrupted, the spring shifts the spool back and the cylinder runs to its rest stroke. If your process needs the cylinder to freeze exactly where it is when power drops - for example holding a lift halfway - you need the double-solenoid 4V420 (memory) instead, and for suspended loads a pilot-operated check valve or mechanical brake should back it up regardless of valve type.
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