Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A is a genuine double-acting profile-type cylinder with a Ø40mm bore, 250mm stroke and a built-in 4M210-08 5/2 solenoid valve — it switches itself from one coil signal, so no separate remote valve or extra plumbing is needed.
- BoreØ40 mm
- Stroke250 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilAC220V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A
The SAUF40X250S-08A is a double-acting profile cylinder with a built-in AirTAC 4M210-08 5/2 solenoid valve on the cap. One AC220V coil signal drives the actuator, eliminating remote plumbing and saving a manifold slot. The extruded aluminum barrel is shorter than an ISO 15552 unit of the same bore. It features a 1/4" valve port, 1/4" cylinder port, and a piston magnet for CMSG/DMSG/EMSG switches.
Operating within the valve's 0.15-0.8 MPa window, this 40mm bore delivers 628 N push and 528 N pull at 0.5 MPa. The 4M210 valve flows 16 mm2 (Cv 0.89) at up to 5 cycles/sec. For sizing, a safe working load is roughly 377 N (about 60% of the 0.5 MPa push), translating to a 32 kg vertical lift with a 2:1 margin. Note the cylinder body rates to 1.0 MPa, but the assembled unit is capped by the valve's 0.8 MPa limit.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A |
|---|---|
| Series | SAUF profile cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, self-valved |
| Cylinder port | 1/4" |
| Rod thread | M12×1.25 |
| PU tube | Ø8 × Ø5 |
| Built-in valve | 4M210-08 (5/2) |
|---|---|
| Valve flow | 16.0 mm² (Cv 0.89) |
| Max frequency | 5 cycle/sec |
| Coil voltage | AC220V · AC 3.5 VA |
| Electrical entry | Terminal · IP65 · B class |
| Response time | 0.05 s and below |
| Operating pressure | 0.15 – 0.8 MPa (valve limit) |
| Speed range | 30 – 800 mm/s |
The cylinder rates to 1.0 MPa but the built-in valve operates 0.15–0.8 MPa, so run the assembled SAUF at 0.15–0.8 MPa. Default: rod retracts when the coil is energised (reconfigurable to extend). Specs follow the official AirTAC SAUF datasheet. Port options: PT / G.
Theoretical Output Force (Ø40mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 628 N | 528 N |
| 0.7 MPa | 880 N | — |
Sized within the valve's 0.15–0.8 MPa range. Actual usable force is lower than theoretical due to friction and back-pressure.
Model Code: Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 40×250 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| A | Coil voltage AC220V. |
| I / (blank) | Terminal electrical entry. |
SAUF does not hold its load without air — the valve routes air, it is not a lock. For a held load, add an external rod lock or a pilot-operated check valve.
Where the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A Is Used
Diverter Gate Actuation
Decentralized sorting line diverter where the integrated valve eliminates long tube runs back to a central manifold, speeding up packaging flows.
Independent Clamping Station
Machine fixture requiring a single AC220V signal to clamp parts, freeing up manifold slots for other primary actuators on the assembly bench.
Component Pusher
Automated cell pusher that cycles at up to 5 Hz, using the 4M210 valve flow to quickly index parts without complex remote plumbing.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A the Right Choice?
Size by force and stroke: the 40mm bore offers 628 N push at 0.5 MPa, sitting between the 32mm (402 N) and 50mm (982 N) options. Confirm the AC220V terminal entry and PT threads suit your control panel. The rod retracts when energised by default; reposition the valve to extend on signal. Always size force within the 0.15-0.8 MPa valve range, not the 1.0 MPa cylinder rating. The built-in valve routes air and is not a lock—add an external rod lock or pilot-operated check valve to hold loads safely. For this 250mm stroke, ensure side-load guidance to prevent rod binding.
Quick checklist
- ✓ Force at 0.15–0.8 MPa
- ✓ Coil voltage matches panel
- ✓ Terminal vs grommet entry
- ✓ Retract- or extend-when-energised
- ✓ Load-holding → external rod lock
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250S-08A FAQ
It delivers 628 N push and 528 N pull at 0.5 MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89, 5 cycles/sec max) driven by an AC220V terminal-entry coil (IP65). The cylinder body rates to 1.0 MPa, but the assembled unit must operate within the valve's 0.15-0.8 MPa window.
Yes. The default action retracts the rod on signal, but you can reconfigure it to extend-when-energised simply by repositioning the built-in valve. This allows flexible machine sequencing without altering your electrical wiring.
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