Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke250 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilAC220V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A
The AirTAC SAIF50X250-08A is a double-acting ISO 15552 profile cylinder featuring an integrated 4M210-08 5/2 solenoid valve. Delivering a Cv of 0.89 and operating on AC220V via a terminal electrical entry, it generates 982N of push force at 0.5MPa. While the cylinder body rates to 1.0MPa, the practical working range for this valved assembly is 0.15-0.8MPa. The manifold links the valve to the cylinder using O8xO5 PU tubing, keeping the 1/4-inch valve port distinct from the cylinder's own 1/4-inch port.
By driving the cylinder directly from a single coil signal, this unit eliminates the need for a remote valve bank, saving panel space and making it ideal for decentralized machine stations. The factory setting retracts the piston rod when the coil is energised, but you can reconfigure the valve to extend-when-energised by simply repositioning it. The AC coil consumes 3.5VA, features IP65 protection, and activates in 0.05s or less.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø50 mm |
| Stroke | 250 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 SAIF50X250-08A
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×250 | 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 SAIF50X250-08A Is Used
Decentralized Assembly Stations
Eliminates the need for long air lines from a central valve manifold, allowing independent control directly at the workstation.
Compact Automation Retrofits
Ideal for upgrading existing machinery where routing new valve tubing is costly or space-prohibitive, using the integrated manifold.
Material Diverters
Provides the 982N push force needed to actuate sorting gates and diverters directly along the conveyor line.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08A the Right Choice?
Choose this 50mm bore when you need more thrust than the 40mm version (which provides 628N push at 0.5MPa) but want to avoid the larger envelope of a 63mm cylinder. A self-valved SAIF50X250-08A is superior to a separate cylinder and remote valve when you need to minimize plumbing across a large machine, as it cuts down tubing and wiring complexity. Because the stroke is 250mm, ensure adequate guidance to prevent side-loading on the rod. To replace this unit, match the 50mm bore, 250mm stroke, 1/4-inch valve port, AC220V terminal coil, PT thread, and standard carbon steel rod without a sensor magnet. Note that the 5/2 valve routes air but does not hold the load without live pressure; for true position holding, consider the SAIL lock series.
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 SAIF50X250-08A FAQ
At 0.5MPa, the 50mm bore provides 982N of push force and 825N of pull force. The maximum push force is 1767N at 0.7MPa and 7068N at 0.9MPa.
Yes. The factory setting retracts the rod when the AC220V coil is energised, but you can reconfigure it to extend-when-energised by repositioning the 4M210-08 valve on the manifold block.
Related AirTAC Cylinders & Valves
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