AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B)
The AirTAC AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) is a genuine 5/2-way single solenoid (spring return) solenoid valve with 21008B 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.
- Valve type5/2-way
- FunctionSingle solenoid (spring return)
- Port size21008B
- Effective area17.0 mm²
- Flow (Cv)1.0
- Series4V200
About the AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B)
The AirTAC 4V210-08B is a 5/2-way single-solenoid directional control valve built on the popular 4V200 mid-body platform. It directs compressed air to double-acting cylinders and actuators, energising the DC24V coil to shift the spool and automatically returning to its home position via a mechanical spring when the signal is removed. This spring-return action makes it a predictable choice for tasks where the actuator must default to a known safe state on power loss.
With an effective area of 17.0 mm² (Cv 1.0), this 1/4in PT-ported valve suits pneumatic cylinders in the ~O32-50 mm bore range for general automation. The DC24V coil draws just 3.0 W of power, and the valve’s response time is 0.05 seconds or less, giving crisp, repeatable shifts. The aluminium-alloy body weighs 220 g and is IP65 rated, ready for direct terminal-box wiring.
AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) Technical Specifications
| Model | AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) |
|---|---|
| Series | 4V200 solenoid valve (spool type) |
| Valve type | 5/2-way |
| Function | Single solenoid (spring return) |
| Port size | 21008B |
| Exhaust port | 21008B |
| 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.
Flow & Coil Options
| 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.
Model Code: AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B)
| 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. |
| -21008B | 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.
Where the AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) Is Used
Clamping & Fixturing
The spring-return action ensures a clamp opens automatically when the DC24V signal is cut, making the 4V210-08B a safe, predictable choice for workholding on machining centres and assembly jigs.
Part Ejection & Sorting
Drives a double-acting pusher cylinder to divert products on a conveyor. The 5/2 single-solenoid function gives a crisp extend stroke when energised and a spring-driven retract when the sensor clears.
Actuator Control in Packaging
Powers the sealing jaw or label applicator on a packaging machine. The 0.05 s response and Cv 1.0 flow suit mid-speed cycling of O32-50 mm bore cylinders common in this segment.
Is the AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) the Right Valve?
Choose the 4V210-08B when you need a single-solenoid 5/2 valve with a 1/4in port and a low-power DC24V coil. If your cylinder is smaller (below O25 mm), stepping down to a 4V100-series valve (Cv 0.6) can save space and air consumption. For larger bores or faster cycle rates above O50 mm, the 4V300 body (Cv 1.65) provides the extra flow capacity. This single-solenoid, spring-return configuration is ideal when the application requires the valve to return to a defined position when de-energised, unlike a double-solenoid memory valve.
When replacing an existing valve, match five points: the 4V200 body size, the 5/2 single-solenoid function (code 10), the 1/4in PT thread, the DC24V coil voltage, and the standard terminal-box electrical entry. The valve can be used individually or mounted on a common manifold base for a compact, centralised air supply to multiple valves.
Quick checklist
- ✓ Required flow (Cv) for cylinder & speed
- ✓ Function: single / double / 5-3 center
- ✓ Coil voltage (DC24 / AC220 …)
- ✓ Port thread (M5 / 1/8 / 1/4 / 3/8 / 1/2)
- ✓ Single valve or manifold base?
Installation & Wiring Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 0.8 MPa operating pressure.
- check Match coil voltage to your controller output.
- check Use the manual override to test before powering.
- check Fit silencers or fittings to the exhaust ports.
- check Wiring by qualified personnel per AirTAC docs.
AirTAC 4V210-08B Solenoid Valve, 5/2-way, PT1/4, DC24V, terminal entry (4V21008B) FAQ
With an effective area of 17.0 mm² (Cv 1.0), this 4V200-series valve suits double-acting cylinders in the ~O32-50 mm bore range for typical automation speeds. For very high-speed applications with a 50 mm bore, or for bores above 63 mm, consider the larger 4V300 series (Cv 1.65) to avoid flow restriction.
The 4V210-08B requires a continuous DC24V signal to hold the solenoid in the actuated position. When power is removed, the internal spring forces the spool back to its normal position, exhausting the previously pressurised cylinder port. This ensures the actuator returns to a known default state without any external intervention.
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