Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B is a genuine double-acting ISO 15552 cylinder with a Ø50mm bore, 400mm 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
- Stroke400 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B
The AirTAC SAIF50X400S-08B is a double-acting ISO 15552 profile cylinder with a built-in 4M210-08 5/2 solenoid valve, providing a Cv of 0.89. Driven by a DC24V terminal coil drawing 3.0 W, it integrates switching directly on the actuator. The assembly operates within a 0.15-0.8 MPa range, as the valve limits the 1.0 MPa cylinder rating. Delivering 982N push force at 0.5 MPa, it uses a carbon steel rod and includes a magnet for CMSE and DMSE sensors.
By default, the piston rod retracts when the coil is energised, but you can reconfigure it to extend-when-energised by repositioning the valve. This decentralized design requires no remote valve bank, using a short PU tube (O8 x O5) between the manifold and cylinder to minimize plumbing. The valve port is 1/4 inch PT, while the cylinder port is also 1/4 inch.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø50 mm |
| Stroke | 400 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 SAIF50X400S-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×400 | 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 SAIF50X400S-08B Is Used
Decentralized Stations
Ideal for large machines where running air lines to a central valve bank is costly, letting each cylinder switch itself via a single DC24V signal.
Space-Tight Machines
Fits compact assemblies by combining the actuator and 5/2 valve into one envelope, saving valuable panel and floor space.
Wiring Retrofits
Perfect for upgrades where adding electrical wiring is easier than plumbing new pneumatic lines across a facility.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X400S-08B the Right Choice?
Choose this self-valved SAIF unit when a decentralized station eliminates the cost of running tubing back to a main panel. If your application requires less force, the 40mm bore offers 628N push at 0.5 MPa; if you need more, the 63mm bore provides 1559N. For this 400mm stroke, add external guides to prevent side-load wear on the seals. Remember that the 5/2 valve routes air and is not a lock; for load-holding, select the SAIL series instead. To replace this unit, match the 50mm bore, 400mm stroke, 1/4 inch valve port, DC24V voltage, terminal entry, PT threads, and the -S magnet.
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 SAIF50X400S-08B FAQ
The 50mm bore generates 982N push force at 0.5 MPa. The built-in 4M210-08 valve has an effective area of 16.0 mm2 (Cv 0.89) and a max frequency of 5 cycles per second.
No, the built-in 5/2 solenoid valve switches the cylinder directly from a DC24V terminal coil signal. Factory set to retract when energised, the valve can be repositioned to extend-when-energised.
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