The AirTAC Airtac 4V Solenoid Valves 4V430C15C-W is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with W ports and an effective area of 40.0 mm² (Cv 2.35). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
The AirTAC 4V430C15C-W is a 5/3-way closed-center solenoid valve built on the largest 4V400 body with a 1/2" PT port. Two solenoids pulse the spool between positions, and at center every port is blocked, so a double-acting cylinder stops and stays where it was until the next command. With an effective area of 40 mm² (Cv 2.35), it matches double-acting cylinders in the ~80-125 mm class, and the spool responds in 0.05 s or less.
This -W variant draws pilot air from a separate external port instead of tapping it internally from the main line, which keeps switching dependable where main-line pressure is low or the circuit runs near vacuum. The AC110V coil consumes 4.5 VA and connects through a terminal box; the aluminum-alloy body weighs 770 g and carries IP65 protection plus a locking or non-locking manual override.
| Model | Airtac 4V Solenoid Valves 4V430C15C-W |
|---|---|
| Series | 4V400 solenoid valve (spool type) |
| Valve type | 5/3-way |
| Function | 5/3 double solenoid — Closed center |
| Port size | W |
| Exhaust port | W |
| Effective area (Cv) | 40.0 mm² (Cv 2.35) |
| 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 | 770 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 | 40.0 mm² |
|---|---|
| Flow coefficient | Cv 2.35 |
| 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. |
| 3 | 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.
Closed-center blocking pins a heavy clamp ram or press slide the moment both coils drop out. For suspended or fall-hazard loads, add pilot-operated check valves at the cylinder ports - the valve alone is not a certified safety brake.
Double-acting cylinders in the ~80-125 mm range get smooth, symmetrical flow from the 40 mm² (Cv 2.35) passages, holding a platform at height between commands while the 3 cycle/s rating covers fast repeat duty.
The external-pilot -W feed shines where an internally piloted valve would stutter: low main-line pressure, vacuum circuits, or manifold installs where a dedicated pilot supply keeps every station switching crisply.
Step up from a 4V300 (Cv 1.65) to this 4V400 body when the smaller valve can no longer keep your cylinder cycle time on target; 4V400 is the biggest 4V body, so for flows beyond Cv 2.35 you move to a larger valve series or build an integrated manifold group on a base. Among 5/3 options, closed center (30C) is the pick when the actuator must freeze mid-stroke, while exhaust center lets it drift and pressure center biases both chambers.
Replacing an existing unit means matching five points exactly: 4V400 body, 30C closed-center function, 1/2" PT thread, AC110V coil, and terminal entry - and confirm the sixth detail, the external-pilot -W option, since it changes the plumbing even though it does not appear in the base designation.
Quick checklist
It is a 5/3-way double-solenoid valve for double-acting cylinders and actuators - never single-acting types, which need a 3/2 valve. Its 40 mm² effective area (Cv 2.35) suits bores of roughly 80-125 mm, switching up to 3 cycles per second with a response of 0.05 s or less.
The -W suffix means pilot air is supplied through a separate external port rather than tapped from the main line, so the spool still shifts reliably when main pressure runs low or the circuit is under vacuum. Electrically, the AC110V coil (4.5 VA) terminates in a terminal box; pilot air should come from clean, filtered air per the valve's 40 um filtration requirement.
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