The AirTAC Airtac 4V Solenoid Valves 4V230C08BG-W is a genuine 5/3-way 5/3 double solenoid — closed center solenoid valve with W ports and an effective area of 13.6 mm² (Cv 0.8). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
The AirTAC 4V230C08BG-W is a 5/3-way closed-center solenoid valve in the mid-size 4V200 body, built with G (BSPP parallel) 1/4 in ports and a DC24V coil that draws just 3.0 W. Two solenoids pulse the spool left or right; when neither is energised, all five ports block, so a double-acting cylinder pauses and traps its position mid-stroke - handy wherever a slide or press ram must stop part-way through a cycle. At 0.5 MPa this flow class pairs with roughly Dia32-50 mm bores, from about 41 kgf push on a Dia32 cylinder up to about 100 kgf on a Dia50. Flow capacity is 13.6 mm2 effective area (Cv 0.8), the 5/3 figure for this series, with a 3 cycle/second ceiling and response of 0.05 s or less. The aluminum body weighs 360 g, runs from 0.15-0.8 MPa between -20 and 70 C on air filtered through a 40 um element, needs no lubrication, and is rated IP65 (DIN40050) with class B insulation. Manual override, internal or external pilot, and grouped mounting on a common manifold base are all standard.
| Model | Airtac 4V Solenoid Valves 4V230C08BG-W |
|---|---|
| Series | 4V200 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) | 13.6 mm² (Cv 0.8) |
| 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 | 360 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 | 13.6 mm² |
|---|---|
| Flow coefficient | Cv 0.8 |
| 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. |
| 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: 4V210 (single), 4V220 (double), 4V230C/E/P (5/3 center). Add the voltage suffix when ordering.
On a drilling or tapping dial, a Dia40 double-acting lock cylinder (~64 kgf at 0.5 MPa) pins the index plate while the head cuts. The closed center traps that position between pulses, so the table cannot creep off its stop mid-cycle.
A packaging machine's Dia50 bore press jaw, pushing about 100 kgf at 0.5 MPa through this valve's Cv 0.8 section, can be stopped between cartons with the ports blocked, holding jaw height without a continuous coil signal - the 3.0 W DC24V coil sips power only during switching.
A vertical stop blade fed by a Dia32 cylinder (~41 kgf at 0.5 MPa) raises and holds to catch each pallet. With 1/4 in G ports and a 0.05 s response, the blade acts within one PLC scan, and the blocked center keeps the blade up while the line waits.
The 5/3 spool gives 13.6 mm2 (Cv 0.8) and a 3 cycle/second limit, so it matches double-acting cylinders around Dia32-50 mm: a Dia50 bore delivers roughly 100 kgf at 0.5 MPa and a Dia32 about 41 kgf. For a Dia20-25 cylinder or a slow, light-duty stroke, the smaller 4V100 body (Cv 0.6) is usually sufficient; for a Dia63 bore or faster cycle times, step up to the 4V300 (Cv 1.65). Choose the 30C closed center only when the actuator must stop and stay put at mid-stroke - if the cylinder should float or stay pressurised on both sides, pick 30E or 30P instead. A single valve on its base or several valves ganged on a manifold block both suit this body. When ordering a replacement, match five points exactly: 4V200 body, 30C closed-center function, G1/4 thread, DC24V coil, and terminal-box electrical entry. A miss on any one of these is the usual cause of a valve that will not drop in.
Quick checklist
Flow is 13.6 mm2 effective area (Cv 0.8) for this 5/3 body, with response of 0.05 s or less and a maximum of 3 cycles per second. Operating pressure spans 0.15-0.8 MPa against a 1.2 MPa proof rating, on air filtered through a 40 um element. The DC24V coil draws 3.0 W, the aluminum body weighs 360 g, and the valve is IP65 (DIN40050), class B insulated, usable from -20 to 70 C without lubrication.
The closed center blocks all ports, so it stops a double-acting cylinder mid-stroke by trapping air, which holds light and moderate loads well. It remains a directional valve, not a certified safety brake: internal leakage can let a load drift slowly over time. Where a suspended load must never fall, add pilot-operated check valves at the cylinder ports or a dedicated mechanical brake alongside the valve.
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