Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B 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"
- CoilDC24V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B
The SAUF40X250-08B is a double-acting profile cylinder with a built-in AirTAC 4M210-08 5/2 solenoid valve on the cap. One coil signal drives the motion, eliminating remote plumbing and saving a manifold slot. The extruded aluminum barrel makes it shorter than an ISO 15552 unit of the same bore. It features a 1/4" cylinder port, an M12x1.25 rod thread, and 21mm adjustable cushions.
Operating within the valve's 0.15-0.8 MPa window, this 40mm bore generates 628N push and 528N pull at 0.5 MPa. The integrated valve flows 16mm2 (Cv 0.89) and handles up to 5 cycles per second. The DC24V coil offers IP65 protection with terminal entry. For sizing, the safe working load is roughly 377N, and it can vertically lift about 32kg with a 2:1 margin. Note this SKU lacks a magnet and cannot accept a sensor.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B |
|---|---|
| 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 | DC24V · DC 3.0 W |
| 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 SAUF40X250-08B
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 40×250 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| B | Coil voltage DC24V. |
| 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 SAUF40X250-08B Is Used
Decentralized Conveyor Divert
Mounts directly at the divert gate to push packages, needing only one coil signal and no long tubing runs back to a central manifold.
Independent Clamping Station
Provides standalone clamping on a multi-station machine, saving a manifold slot while delivering 528N pull force at 0.5 MPa.
Compact Assembly Ejector
Ejects parts at up to 5 cycles per second using the built-in 4M210 valve, fitting neatly into tight machine frames without remote plumbing.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF40X250-08B the Right Choice?
When sizing, compare this 40mm bore (628N push at 0.5 MPa) against the 32mm bore (402N) or 50mm bore (982N) to match your load within the 0.15-0.8 MPa valve limit. The cylinder body rates to 1.0 MPa, but the assembled SAUF must operate at 0.8 MPa or below. Confirm the DC24V terminal entry and PT threads suit your controls. The rod retracts when energised by default but can be reconfigured to extend by repositioning the valve. Since the 250mm stroke exceeds 300mm, ensure adequate side-load guidance. This valve only routes air; it is not a lock, so add an external rod lock or pilot-operated check valve to hold loads safely.
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 SAUF40X250-08B FAQ
It generates 628N push and 528N pull at 0.5 MPa, reaching 1005N push at 0.8 MPa. The built-in valve is a 4M210-08 (5/2 solenoid) with 1/4" port, Cv 0.89, and 5 cycles/sec max. The DC24V coil uses terminal entry. Although the cylinder body rates to 1.0 MPa, the assembled unit must operate within the valve's 0.15-0.8 MPa window.
This specific SKU lacks a magnet (no -S suffix) and cannot accept a magnetic switch. Additionally, the built-in valve only routes air; it is not a load lock. The piston will drift on air loss, so you must add an external rod lock or pilot-operated check valve for load holding.
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