Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A is a genuine double-acting ISO 15552 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 SAIF Series Standard Cylinder with Valve SAIF40X250-08A
The AirTAC SAIF40X250-08A is a double-acting ISO 15552 profile cylinder featuring an integrated 4M210-08 5/2 solenoid valve. This built-in valve delivers a 16.0 mm2 effective area (Cv 0.89) and operates via an AC220V terminal electrical connection. By bundling the actuator and valve, this unit eliminates remote plumbing and saves panel space, making it highly effective for decentralized machine stations. The manifold connects the valve to the cylinder using PU tubing (O8 x O5).
While the base cylinder rates to 1.0 MPa, the practical working pressure for this assembled SAIF unit is 0.15-0.8 MPa because of the internal pilot valve limits. It generates 628 N of push force at 0.5 MPa. Factory configured to retract the rod when the coil is energised, the valve can be repositioned to extend-when-energised if your logic requires it. The standard carbon steel piston rod features an M12x1.25 thread, and variable air cushions (27 mm) decelerate the load near stroke ends.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 250 mm |
| Acting type | Double acting, self-valved |
| Cylinder port | G1/4 |
| 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 SAIF at 0.15–0.8 MPa. Default: rod retracts when the coil is energised (reconfigurable to extend). Specs follow the official AirTAC SAIF 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 SAIF Series Standard Cylinder with Valve SAIF40X250-08A
| SAIF | ISO 15552 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. |
SAIF does not hold its load without air — the valve routes air, it is not a lock. For load-holding use a SAIL (lock) or BSAI (clamp-lock).
Where the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A Is Used
Decentralized Assembly Stations
Ideal for large factory layouts where running remote valve tubing is costly, this self-valved cylinder drives localized clamping directly from one AC220V signal.
Compact Packaging Equipment
Saves valuable panel and machine space by integrating the 4M210 valve directly onto the actuator, streamlining 40mm bore motion control.
Material Diverting
Provides reliable 250mm stroke actuation for sorting gates, utilizing the built-in valve's fast 5 cycle/sec frequency to keep product flow moving.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A the Right Choice?
Select this 40mm bore when you need 628 N push force at 0.5 MPa and want to avoid routing separate valve tubing across a large machine. If your application demands higher thrust, stepping up to the 50mm bore yields 982 N push at 0.5 MPa. Conversely, lighter duties can use the 32mm bore providing 402 N. This SAIF40X250-08A is specified with a 250mm stroke, a PT1/4 cylinder port, and a PT1/4 valve port. Ensure your replacement matches the 4M210-08 valve, AC220V voltage, terminal entry, and standard carbon steel rod without a magnet.
Because the 250mm stroke exceeds 300mm safety thresholds for side loading, you should use external guide rails to prevent rod binding. Remember that the 5/2 valve routes air but does not lock the load mechanically; if you need true position holding without live pressure, consider the SAIL lock cylinder instead. The unit operates at 30-800 mm/s.
Quick checklist
- ✓ Force at 0.15–0.8 MPa
- ✓ Coil voltage matches panel
- ✓ Terminal vs grommet entry
- ✓ Retract- or extend-when-energised
- ✓ Load-holding → SAIL / BSAI
Airtac SAIF Series Standard Cylinder with Valve SAIF40X250-08A FAQ
The 40mm bore generates 628 N of push force at 0.5 MPa and 879 N at 0.7 MPa. The integrated 4M210-08 5/2 valve has a 16.0 mm2 orifice with a Cv of 0.89, supporting a maximum no-load frequency of 5 cycles per second.
No, the SAIF40X250-08A switches itself using the built-in 4M210 valve manifold block, requiring only an AC220V terminal connection. By default, the piston retracts when the coil is energised, but you can reposition the valve to extend-when-energised.
Related AirTAC Cylinders & Valves
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