The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X400S-08A is a genuine double-acting ISO 15552 cylinder with a Ø40mm 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.
The AirTAC SAIF40X400S-08A 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 an AC220V terminal-connected coil drawing 3.5 VA, it eliminates the need for a separate remote valve. The integrated manifold connects the valve to the cylinder using O8 x O5 PU tubing, ensuring rapid actuation. Because the valve operates at 0.15-0.8 MPa, the practical working range for this assembled SAIF unit is 0.15-0.8 MPa, even though the cylinder body itself rates to 1.0 MPa.
This 40mm bore generates 628N of push force and 528N 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 if your sequence demands it. The included -S magnet works seamlessly with AirTAC CMSE reed and DMSE electronic sensors for precise position tracking. This decentralized, self-switching design minimizes panel space and tubing runs across large machines.
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X400S-08A |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 400 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.
| 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.
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×400 | 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).
Eliminates remote valve plumbing by driving the 40mm bore directly from a local AC220V signal, saving panel space on large automation lines.
Provides 628N push force over a 400mm travel distance, ideal for parts handling that requires end-of-stroke cushioning and precise CMSE/DMSE position verification.
Drops into existing ISO 15552 mounting footprints to upgrade older systems with a self-contained, terminal-wired pneumatic actuator that minimizes wiring complexity.
Choose this 40mm bore when a 32mm bore (402N push at 0.5 MPa) is insufficient, but a 50mm bore (982N push at 0.5 MPa) would be overkill. The self-valved SAIF architecture is ideal for decentralized stations where running separate valve tubing is costly or space-prohibitive. It provides a clean, single-coil signal solution. For replacement, verify the 400mm stroke, 1/4" valve port, PT1/4" cylinder port, AC220V terminal coil, and the -S magnet requirement.
Since the stroke is 400mm, ensure adequate guide support to prevent rod side-loading and premature wear. Remember that the 5/2 valve routes air and is not a mechanical lock; the air cushion only decelerates near the stroke end. If your application requires true load-holding without live pressure, consider the AirTAC SAIL lock cylinder instead.
Quick checklist
At 0.5 MPa, this 40mm bore cylinder generates 628N of push force and 528N of pull force. Because it uses a built-in 4M210-08 valve, the practical operating pressure for the assembled unit is 0.15-0.8 MPa, even though the cylinder body alone rates to 1.0 MPa.
No, it features an integrated 4M210-08 5/2 valve directly mounted via a manifold block. By default, the factory setting retracts the rod when the AC220V coil is energised, but the valve can be repositioned to extend-when-energised if needed.
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