The AirTAC Airtac 4V Solenoid Valves 4V230C08BT-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 4V230C08BT-W is a 5/3-way double-solenoid valve with a closed center, built on the 4V200 aluminum-alloy body. With 1/4in NPT supply and working ports, it pressurises both cylinder lines or blocks all three ports at center, so a double-acting cylinder parked mid-stroke stays where it was left until the next pulse arrives. Because both solenoids only receive short pulses, the spool simply rests in its last position between commands - there is no spring to fight and no standby coil draw. In this closed-center class the valve flows 13.6 mm2 (Cv 0.8), so it is matched to Dia32-50 mm double-acting cylinders where a positive mid-stroke stop matters more than raw speed. The DC24V coil draws just 3.0 W, which keeps 24 V panel supplies and PLC transistor outputs comfortable. Activation takes 0.05 s or less, the terminal-box housing is IP65 (DIN40050) sealed, and the complete valve weighs 360 g.
| Model | Airtac 4V Solenoid Valves 4V230C08BT-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.
A small drilling head raised by a Dia50 mm cylinder can be parked between holes: closed center blocks both lines at 13.6 mm2 (Cv 0.8), and the 0.05 s response keeps dwell points repeatable. For heavy overhung loads, add pilot-operated checks at the ports.
Stopper cylinders on a filling conveyor are extended and retracted by short pulses; at center the pin freezes in place while sensors clear the row, with the DC24V 3.0 W coil switching straight from a PLC output.
A swing clamp fed by this valve holds its clamped or open stance whenever the robot pauses mid-program, since both lines are blocked. The 1/4in NPT supply and 1/8in exhaust keep piping compact inside the fixture frame.
Size in both directions before ordering. If your cylinder is below Dia32 mm or your cycle needs less air, step down to the 4V100 body (Cv 0.6). If you are driving Dia63 mm bores or chasing faster extension on the same pressure, step up to the 4V300 body (Cv 1.65). Within the 4V200 range, pick the 4V210 if a single solenoid with spring return is enough, the 4V220 if you want 5/2 memory without a center state, and this 4V230C when the load must be blocked between moves. Single valves mount directly; several stations can share one manifold base for cleaner piping. For an exact replacement, match five points: 4V200 body, function 30C (closed center), 1/4in port with NPT thread, DC24V coil, and terminal-box entry.
Quick checklist
Effective area 13.6 mm2 (Cv 0.8) with a maximum cycling rate of 3 cycles per second, activation time 0.05 s or less, operating pressure 0.15-0.8 MPa (proof 1.2 MPa), and a DC24V coil drawing 3.0 W. The valve weighs 360 g and carries an IP65 (DIN40050) rating with class B insulation. Air must be filtered by a 40 um element, and no lubrication is required.
It blocks both cylinder ports at center, so the load stops moving under normal conditions - useful for mid-stroke dwells onDia32-50 mm double-acting cylinders. However, spool-valve sealing alone should not be trusted as a safety brake: for guaranteed fall protection on a suspended load, fit pilot-operated check valves at the cylinder ports or a dedicated mechanical brake alongside this valve.
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