The AirTAC Airtac 4V Solenoid Valves 4V210-08CT is a genuine 5/2-way single solenoid (spring return) solenoid valve with 08CT ports and an effective area of 17.0 mm² (Cv 1.0). It is an internally piloted spool valve that directs compressed air to double-acting cylinders and actuators.
The AirTAC 4V210-08CT is a single-solenoid, 5/2-way pneumatic directional valve built on the popular 4V200 body. It directs compressed air to double-acting cylinders and actuators, using an AC110V coil to shift the spool. When the coil is energized, the valve supplies pressure to one cylinder port while exhausting the other; de-energizing the coil allows the integrated mechanical spring to return the spool to its home position. This spring-return action makes it a safe default choice for applications where the actuator must move to a known state when power is cut.
With a 17.0 mm² effective area (Cv 1.0) and a response time of 0.05 seconds or less, this valve suits pneumatic cylinders in the Ø32–50 mm range. The 4V210-08CT is configured with 1/4 inch NPT ports and a terminal box electrical entry, simplifying wiring to the 4.5 VA AC110V coil. The aluminum-alloy body is rated IP65, operates on filtered air from 0.15 to 0.8 MPa, and requires no additional lubrication.
| Model | Airtac 4V Solenoid Valves 4V210-08CT |
|---|---|
| Series | 4V200 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 08CT |
| Exhaust port | 08CT |
| Effective area (Cv) | 17.0 mm² (Cv 1.0) |
| 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 | 5 cycle/sec |
| Response time | ≤ 0.05 s (activating) |
| Temperature | -20 to +70 °C |
| Body material | Aluminum alloy |
| Weight | 220 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 | 17.0 mm² |
|---|---|
| Flow coefficient | Cv 1.0 |
| 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. |
| 1 | Function: 1 = single 5/2, 2 = double 5/2, 3 = 5/3. |
| -08CT | 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.
Controls a pneumatic pusher on a packaging conveyor. The spring-return function ensures the pusher retracts safely when the AC110V signal is removed, preventing jams.
Operates clamps, diverters, and lift gates on assembly stations. The 1/4 NPT ports and terminal box wiring integrate cleanly into standard industrial control cabinets.
Directs a double-acting cylinder in a pick-and-place unit. The ≤0.05 s response time and Cv 1.0 flow capacity provide the crisp, repeatable motion needed for precision assembly.
Choose the 4V210-08CT when your application needs a single-solenoid 5/2 valve that defaults to a spring-offset position on power loss. The NPT thread and AC110V coil make it a direct fit for many North American machine panels. For smaller cylinders (below Ø25 mm), stepping down to the 4V100 series (Cv 0.6) can improve response; for larger bores or faster cycle times above 5 Hz, the 4V300 series (Cv 1.65) provides greater flow capacity.
When replacing an existing valve, match all five points: the 4V200 body size, the 5/2 single-solenoid function, 1/4 inch NPT port threads, an AC110V coil voltage, and a terminal-box electrical entry. If you need a valve that holds its last position without constant power, consider the double-solenoid 4V220-08CT instead.
Quick checklist
With a 17.0 mm² effective area (Cv 1.0), it is well-matched to double-acting cylinders with bores from approximately 32 mm to 50 mm. The actual speed depends on the cylinder's stroke, the load, and the available air pressure, but this valve provides a strong balance of flow and compact size for mid-range actuation tasks.
The 4V210-08CT is a single-solenoid valve with a mechanical spring return. When the AC110V signal is interrupted, the spring automatically pushes the spool back to its default position. This exhausts one side of the double-acting cylinder and pressurizes the other, moving the actuator to a defined home state without any electrical power.
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