Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 225mm 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.
- BoreØ50 mm
- Stroke225 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilAC220V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A
The AirTAC SAIF50X225S-08A is a double-acting ISO 15552 profile cylinder equipped with a built-in 4M210-08 5/2 solenoid valve. Featuring an effective valve flow of 16.0 mm2 (Cv 0.89), it delivers 982 N of push thrust at 0.5 MPa. This unit includes a magnet for position sensing and utilizes a carbon steel piston rod with PT tapered port threads. The AC220V terminal coil draws 3.5 VA, features IP65 protection, and activates in 0.05 s or less.
While the bare cylinder rates to 1.0 MPa, the integrated valve operates at 0.15-0.8 MPa, establishing the practical working range for the assembled SAIF. The factory setting retracts the rod when the coil is energised, but this can be reconfigured to extend-when-energised by repositioning the valve. By switching itself from one coil signal, it eliminates remote plumbing and saves panel space, making it ideal for decentralized stations across large machines.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø50 mm |
| Stroke | 225 mm |
| Acting type | Double acting, self-valved |
| Cylinder port | G1/4 |
| Rod thread | M16×1.5 |
| 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 (Ø50mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 982 N | 825 N |
| 0.7 MPa | 1374 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 SAIF50X225S-08A
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×225 | 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 SAIF50X225S-08A Is Used
Decentralized Automation
Eliminates the need for a remote valve island on large machines by switching directly at the cylinder, drastically reducing tubing runs and installation time.
Space-Constrained Machinery
The integrated manifold block saves valuable panel space and simplifies wiring, making it perfect for compact assembly cells where an external valve would not fit.
Retrofit & Upgrades
Ideal for upgrading existing ISO 15552 cylinders to self-switching units, avoiding the high cost and labor of routing new pneumatic lines across a factory floor.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X225S-08A the Right Choice?
Choose this self-valved SAIF50X225S-08A when a decentralized installation saves you the cost of running long valve tubing back to a central manifold. If your application requires less force, stepping down to a 40 mm bore yields 628 N push at 0.5 MPa; if you need more power, a 63 mm bore provides 1559 N. The 225 mm stroke is well within the 1200 mm standard limit, but at this length you should ensure adequate side-load guidance to prevent premature seal wear. This assembly uses a 4M210-08 valve with a 1/4" valve port, paired with a 1/4" cylinder port and an O8xO5 PU connecting tube.
Remember that the built-in 5/2 valve routes air and holds its position via pilot pressure, but it is not a lock or brake. If your machine loses pressure, the cylinder will not hold its load. For true mechanical load-holding, consider an AirTAC SAIL lock cylinder instead. To replace this unit, match the 50 mm bore, 225 mm stroke, -S magnet, 1/4" valve port, AC220V terminal coil, and PT threads.
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 SAIF50X225S-08A FAQ
At 0.5 MPa, this 50 mm bore cylinder provides 982 N of push force and 825 N of pull force. The integrated 4M210-08 valve has an effective area of 16.0 mm2 (Cv 0.89) and a maximum operating frequency of 5 cycles per second.
No separate remote valve is needed; one AC220V electrical signal directly drives the cylinder. The factory default setting retracts the rod when energised, but you can reposition the valve to extend-when-energised if your logic requires it.
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