Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B is a genuine double-acting ISO 15552 cylinder with a Ø40mm 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.
- BoreØ40 mm
- Stroke225 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B
The AirTAC SAIF40X225-08B is a double-acting ISO 15552 profile cylinder equipped with a built-in 4M210-08 5/2 solenoid valve, delivering a Cv of 0.89 and a 16.0 mm2 effective area. Driven by a DC24V terminal entry coil consuming 3.0 W, it eliminates the need for a separate remote valve. Because the valve operates at 0.15-0.8 MPa, this defines the practical working pressure range for the assembled unit, even though the bare cylinder rates up to 1.0 MPa. At 0.5 MPa it provides 628N of push force and 528N of pull force.
By default, the piston rod retracts when the coil is energised, but you can reconfigure the valve to extend-when-energised by simply repositioning it. The manifold connects to the cylinder using an O8 x O5 PU tube, and the valve port (1/4") is distinct from the cylinder port (PT1/4). This self-contained design drastically reduces plumbing and panel space, making it perfect for decentralized stations across large machines.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 225 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 | 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 (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 SAIF40X225-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×225 | 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 SAIF40X225-08B Is Used
Decentralized Assembly Stations
Eliminates the need for a central valve bank, allowing independent cylinder control directly at the workstation using a single DC24V signal.
Compact Clamping Jigs
The built-in 4M210 valve saves valuable panel space on tight machinery, providing 628N of clamping force at just 0.5 MPa.
Retrofit Automation
Ideal for upgrading older machines where routing new pneumatic tubing from a remote valve island is impractical or too expensive.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X225-08B the Right Choice?
Choose this 40mm bore when a 32mm bore (402N push at 0.5 MPa) is too weak, but a 50mm bore (982N push at 0.5 MPa) is oversized. The integrated 4M210 valve handles up to 5 cycles per second, making it ideal for high-speed decentralized setups where running separate valve tubing is costly. Select the DC24V terminal coil for standard low-voltage control panels. Remember that the 5/2 valve routes air but does not lock the load; for true position holding under pressure loss, consider the SAIL lock cylinder instead. Since the 225mm stroke exceeds 300mm? No, at 225mm it is under the 300mm threshold, but always ensure adequate guide support for the rod. To replace this unit, match the 40mm bore, 225mm stroke, 08 valve port, DC24V voltage, terminal entry, PT thread, and no magnet (-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 SAIF40X225-08B FAQ
At 0.5 MPa, the cylinder provides 628N of push force and 528N of pull force. The built-in 4M210-08 valve has an effective area of 16.0 mm2 (Cv 0.89) and supports a maximum frequency of 5 cycles per second.
No separate valve is needed; the cylinder switches itself from one DC24V coil signal. The factory setting retracts the rod when energised, but you can reconfigure it to extend-when-energised by repositioning the valve.
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