Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A 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"
- CoilAC220V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A
The AirTAC SAIF40X250S-08A is a double-acting ISO 15552 profile cylinder equipped with a built-in 4M210-08 5/2 solenoid valve. Featuring a 16.0 mm2 orifice (Cv 0.89), this integrated assembly switches itself from a single AC220V terminal coil signal, eliminating the need for remote plumbing. The cylinder bore is 40 mm with a 250 mm stroke, generating 628 N of push force at 0.5 MPa. Because the valve limits the system, the practical operating pressure for the assembled SAIF unit is 0.15-0.8 MPa, even though the bare cylinder rates to 1.0 MPa.
This SKU includes a magnet (-S) for position sensing with AirTAC CMSE reed or DMSE electronic sensors. By default, the piston rod retracts when the coil is energised, but you can reconfigure it to extend-when-energised by simply repositioning the valve. The manifold connects to the cylinder using O8 x O5 PU tubing, and the valve port (1/4") differs from the cylinder port (1/4"). It operates at speeds of 30-800 mm/s without requiring lubrication.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A |
|---|---|
| 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 | 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 (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-08A
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×250 | 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 SAIF40X250S-08A Is Used
Decentralized Stations
Ideal for large machines with decentralized stations, using the integrated 4M210 valve to cut remote plumbing and simplify wiring.
Space-Tight Machines
Fits compact assemblies where mounting a separate valve island is impossible, driving 628 N of force from a single AC220V signal.
Retrofit Upgrades
Perfect for upgrading existing ISO 15552 interchangeable setups where running new valve tubing back to a central panel is too costly.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X250S-08A the Right Choice?
Choose this self-valved SAIF40 unit when decentralizing control across a large machine, as it saves panel space and cuts tubing runs compared to using a separate cylinder and remote valve. If your application requires less force, step down to the 32 mm bore (402 N push at 0.5 MPa); if you need more thrust, step up to the 50 mm bore (982 N push at 0.5 MPa). For this AC220V terminal entry configuration, ensure your control circuit matches the coil's 3.5 VA power draw and IP65 protection. Since the stroke is 250 mm, verify guide arrangements to manage side loads. To replace this exact unit, match the 40 mm bore, 250 mm stroke, 4M210-08 valve, AC220V voltage, terminal entry, PT thread, and -S magnet.
Remember that the built-in 5/2 valve routes air but does not lock the load; if you need true load-holding, consider the AirTAC SAIL pneumatic lock or BSAI clamp-lock cylinder instead. The air cushions only decelerate the piston near the stroke ends.
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-08A FAQ
The 40 mm bore generates 628 N of push force and 528 N of pull force at 0.5 MPa. The built-in 4M210-08 valve has a 16.0 mm2 orifice with a Cv of 0.89.
The 5/2 valve routes air but does not lock the load without live pressure. Factory-set to retract when the AC220V coil energises, you can reposition the valve to extend-when-energised. It eliminates the need for a separate remote valve.
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