Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B 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"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B
The AirTAC SAIF50X250S-08B is a double-acting ISO 15552 profile cylinder featuring a built-in 4M210-08 5/2 solenoid valve. It delivers a push force of 982N at 0.5 MPa and utilizes a 16.0 mm2 orifice (Cv 0.89). Equipped with a DC24V terminal coil drawing 3.0 W, it achieves IP65 protection and a 0.05 s response time. The integrated manifold connects via an O8 x O5 PU tube, while the valve uses a 1/4" port and the cylinder body uses a 1/4" PT port.
Because the cylinder rates to 1.0 MPa but the integrated valve operates at 0.15-0.8 MPa, the practical working range for this assembled unit is 0.15-0.8 MPa. By default, the piston rod retracts when the coil is energized, but you can reconfigure it to extend-when-energized simply by repositioning the valve. This self-contained design eliminates the need for a separate remote valve, saving panel space and tubing, making it ideal for decentralized machine stations. The -S magnet works with AirTAC CMSE (reed) and DMSE (electronic) sensors.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B |
|---|---|
| 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 | 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 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 SAIF50X250SFA-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×250 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| B | Coil voltage DC24V. |
| 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 SAIF50X250SFA-08B Is Used
Decentralized Automation Stations
Perfect for large machines where running individual valve lines is costly; the integrated 4M210 valve handles switching directly at the cylinder.
Compact Assembly Machinery
Saves valuable panel space by eliminating remote valve banks, driving 982N of force at 0.5 MPa with a direct DC24V signal.
Retrofit & Upgrade Projects
Easily add self-switching actuation to existing lines without re-plumbing central manifolds, utilizing the ISO 15552 mounting interface.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250SFA-08B the Right Choice?
Choose this self-valved SAIF unit when decentralized installation matters: it switches itself from one coil signal, removing the need to run long valve tubing back to a central manifold. If your application requires less force, stepping down to a 40 mm bore yields 628N push at 0.5 MPa; if you need more power, a 63 mm bore provides 1559N. Remember that the built-in 5/2 valve routes air but does not hold the load without live pressure—use a SAIL lock cylinder for true position holding. Since the stroke is 250 mm, ensure adequate guiding to prevent side-load wear on the rod seals.
When ordering a replacement, verify the 50 mm bore, 250 mm stroke, 1/4" valve port, DC24V voltage, terminal entry, PT thread, and the -S magnet. The standard carbon steel rod and FA mounting accessory are included.
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 SAIF50X250SFA-08B FAQ
The 50 mm bore produces 982N push force at 0.5 MPa and 1767N at 0.9 MPa. The built-in 4M210-08 valve has a 16.0 mm2 orifice with a Cv of 0.89.
No, the integrated 5/2 valve switches the cylinder directly from a DC24V signal. By factory default, the rod retracts when energized, but you can reposition the valve to extend-when-energized.
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