Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B 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"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B
The AirTAC SAIF40X250S-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. Driven by a DC24V terminal entry coil consuming 3.0 W, it activates in 0.05 s with an IP65 rating. The integrated manifold uses an O8 x O5 PU tube to bridge the valve and cylinder. 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 this assembly.
This self-contained unit generates 628 N of push force and 528 N of pull force at 0.5 MPa. By default, the factory setting retracts the piston rod when the coil is energised, but you can reposition the valve to extend-when-energised. The -S magnet supports position detection with AirTAC CMSE reed and DMSE electronic sensors. It eliminates the need for a remote valve, saving panel space and plumbing across decentralized machine stations.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B |
|---|---|
| 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 | 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 SAIF40X250S-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×250 | 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 SAIF40X250S-08B Is Used
Decentralized Assembly Stations
Ideal for large machines with multiple stations, eliminating long tubing runs by mounting the valve directly on the cylinder.
Compact Clamping Fixtures
Provides 628 N of push force at 0.5 MPa in tight spaces where external valve manifolds cannot fit.
Wiring-Retrofit Upgrades
Simplifies machine upgrades by replacing separate cylinder and valve setups with a single DC24V terminal-driven unit.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08B the Right Choice?
Choose this 40mm bore when a 32mm bore (402 N push at 0.5 MPa) is insufficient, but a 50mm bore (982 N push at 0.5 MPa) is oversized. The SAIF40X250S-08B is ideal for decentralized installations where running separate valve tubing is costly, as one DC24V coil signal drives the entire cylinder. The valve port is 1/4", while the cylinder port is PT 1/4". For replacements, verify the 250mm stroke, DC24V voltage, terminal entry, PT thread, and the -S magnet. Since the stroke is 250mm, ensure proper guiding to prevent excessive side loading on the rod.
Note that the built-in 5/2 valve routes air but does not lock the load; if the machine loses pressure, the cylinder will move. For true load-holding requirements, consider the SAIL lock cylinder or BSAI clamp-lock series instead of relying on the SAIF cushion.
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 SAIF40X250S-08B FAQ
The 40mm bore generates 628 N push and 528 N pull at 0.5 MPa. The built-in 4M210-08 5/2 valve has an effective area of 16.0 mm2 (Cv 0.89).
By default, the DC24V coil retracts the rod when energised, but you can reposition the valve to extend-when-energised. The 5/2 valve routes air but does not lock the load without live pressure.
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