Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A is a genuine double-acting ISO 15552 cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke250 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilAC220V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A
The AirTAC SAIF50X250S-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 and an effective orifice of 16.0 mm2. Driven by an AC220V terminal-entry coil drawing 3.5 VA, it responds in 0.05 seconds and carries an IP65 rating. The integrated manifold connects via an O8 x O5 PU tube, while the cylinder itself uses a PT 1/4 port. The carbon steel piston rod and -S magnet enable precise position detection with CMSE reed or DMSE electronic switches.
Although the bare cylinder is rated for 1.0 MPa, the practical operating range for this valved assembly is 0.15-0.8 MPa, yielding a push force of 1374 Newtons at 0.7 MPa. By default, the factory setting retracts the rod when the coil is energised, but you can reconfigure it to extend-when-energised simply by repositioning the valve. This self-switching design eliminates the need for a remote valve, reducing tubing and panel space for decentralized machine stations.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø50 mm |
| Stroke | 250 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 | 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 (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 SAIF50X250S-08A
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×250 | 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 SAIF50X250S-08A Is Used
Decentralized Stations
Eliminates remote valve banks on large machines by switching directly from a single AC220V terminal signal, minimizing pneumatic plumbing across long distances.
Space-Tight Machinery
The integrated 4M210-08 valve manifold saves valuable panel space, making it ideal for compact automated equipment where envelope size is restricted.
Retrofit & Upgrades
Perfect for upgrading existing ISO 15552 cylinders to self-switching actuators, avoiding the high labor costs of routing new valve tubing across a factory floor.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08A the Right Choice?
Choose this 50mm bore when you need the 982N push force at 0.5 MPa; stepping down to a 40mm bore drops the push force to 628N, while upgrading to a 63mm bore increases it to 1559N. The self-valved SAIF architecture is ideal for space-tight machines or retrofits where running separate valve tubing is costly, as a single AC220V terminal connection drives the entire actuator. At a 250mm stroke, ensure adequate guiding to prevent side-load damage to the front cover and seals.
Remember that the built-in 5/2 valve routes air and holds its position via pilot pressure, but it is not a mechanical lock. If your application requires true load holding without live pressure, consider the SAIL lock variant. To replace this unit, match the 50mm bore, 250mm stroke, 1/4 valve port, AC220V voltage, terminal entry, PT threads, and -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 SAIF50X250S-08A FAQ
At 0.7 MPa, the 50mm bore generates a push force of 1374 Newtons and a pull force of 825 Newtons. The built-in 4M210-08 5/2 valve provides an effective flow area of 16.0 mm2 with a Cv of 0.89.
No, the integrated 4M210 valve switches the cylinder directly from one AC220V coil signal. By factory default, energising the coil retracts the rod, but the valve can be repositioned to extend-when-energised if needed.
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