Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B 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"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B
The AirTAC SAIF50X250S-08B is a double-acting profile cylinder 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 a DC24V terminal-entry coil consuming 3.0 W, it achieves IP65 protection and a 0.05 s response. The integrated valve manifold uses an O8xO5 PU tube to bridge the valve and cylinder, meaning the 1/4" valve port and the cylinder's own 1/4" port are distinct connections. While the base cylinder rates to 1.0 MPa, the practical SAIF operating range is 0.15-0.8 MPa due to the internal pilot valve.
This 50mm bore unit generates 982N of push force at 0.5 MPa and 1374N at 0.7 MPa. The -S magnet option supports position sensing with AirTAC CMSE reed and DMSE electronic switches. By default, the piston rod retracts when the coil is energised, but you can reconfigure it to extend-when-energised simply by repositioning the valve. This self-switching design eliminates remote plumbing, saving panel space for decentralized machine stations.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B |
|---|---|
| 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 | 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 SAIF50X250S-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 50×250 | 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 SAIF50X250S-08B Is Used
Decentralized Assembly Lines
Ideal for large machines with multiple stations, using the built-in DC24V valve to actuate the 50mm bore locally without running long pneumatic lines back to a main panel.
Compact Clamping Fixtures
Saves valuable envelope space on machinery by combining the ISO 15552 cylinder and 4M210 valve in one assembly, delivering 982N of push force at 0.5 MPa.
Sensor-Ready Diverter
The -S magnet enables precise position feedback via DMSE solid-state sensors, while the self-valved architecture simplifies wiring for high-speed sorting conveyors.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250S-08B the Right Choice?
Choose this 50mm bore when an application demands around 982N of push force at 0.5 MPa. If you need less force, step down to the 40mm bore (628N push at 0.5 MPa); if your load requires more, step up to the 63mm bore (1559N push at 0.5 MPa). The integrated 4M210 valve handles up to 5 cycles per second, making it ideal for high-speed decentralized stations where running separate valve tubing is costly. Because the 5/2 valve routes air without a mechanical lock, it will not hold a load safely without live pressure. For position holding, consider the SAIL lock cylinder or BSAI clamp-lock instead.
When replacing this unit, match the 50mm bore, 250mm stroke, 1/4" valve port, DC24V terminal coil, PT thread, and -S magnet. At 250mm stroke, ensure adequate guiding to prevent excessive side-load wear on the rod.
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-08B FAQ
The 50mm bore generates 982N of push force at 0.5 MPa and 1767N at 0.9 MPa. The built-in 4M210-08 5/2 valve provides an effective area of 16.0 mm2 (Cv 0.89) and supports a maximum frequency of 5 cycles per second.
No, the 5/2 solenoid valve routes air but does not lock the piston mechanically, so it cannot hold a load without live pressure. By default, the rod retracts when the DC24V coil is energised, but this can be reconfigured to extend-when-energised by repositioning the valve.
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