Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B 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 SAIF50X250-08B
The AirTAC SAIF50X250-08B is a double-acting ISO 15552 profile cylinder featuring an integrated 4M210-08 5/2 solenoid valve. This built-in valve delivers a 16.0 mm2 effective area (Cv 0.89) and operates via a DC24V terminal coil drawing 3.0 W. Because the cylinder itself rates to 1.0 MPa but the valve operates 0.15-0.8 MPa, the practical working range for this assembled unit is 0.15-0.8 MPa. The 50mm bore generates 982 N of push force and 825 N of pull force at 0.5 MPa.
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. The manifold connects to the cylinder using O8 x O5 PU tubing, meaning the 1/4" valve port differs from the 1/4" cylinder port. This self-switching design eliminates the need for a separate remote valve, saving panel space and reducing plumbing for decentralized machine stations.
Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B |
|---|---|
| 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 SAIF50X250-08B
| 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 SAIF50X250-08B Is Used
Decentralized Stations
Ideal for large machines where installing individual cylinder-valve units at each station reduces central plumbing and wiring complexity.
Space-Tight Machinery
The integrated manifold block eliminates the need for a remote valve, fitting perfectly into compact automated equipment with limited panel space.
Retrofit Upgrades
A practical drop-in solution for upgrading older pneumatic lines where running new valve tubing back to a central control panel is cost-prohibitive.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B the Right Choice?
Choose this 50mm bore if you need around 982 N push force at 0.5 MPa; stepping down to a 40mm bore yields 628 N, while stepping up to a 63mm bore provides 1559 N. A self-valved SAIF unit is ideal when running tubing from a remote valve bank is costly or impractical, as it only requires a single DC24V electrical signal to operate. Remember that the 5/2 valve routes air and does not hold the load without live pressure; for position holding, consider the SAIL lock series instead. At 250mm stroke, ensure adequate guide support to prevent side-load damage to the rod.
When ordering a replacement, verify the 50mm bore, 250mm stroke, 1/4" valve port, DC24V terminal coil, PT tapered threads, and the absence of a magnet (-S not specified). The standard carbon steel rod suits general pneumatic applications.
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 SAIF50X250-08B FAQ
The 50mm bore generates 982 N push and 825 N pull force at 0.5 MPa. The integrated 4M210-08 valve has a 16.0 mm2 effective area (Cv 0.89) with a maximum frequency of 5 cycles per second.
Yes. The factory setting retracts the rod when the DC24V coil is energised, but you can reposition the valve to extend-when-energised. This self-contained 5/2 valve means no separate remote valve is required.
Related AirTAC Cylinders & Valves
Request a Quote for Airtac SAIF Series Standard Cylinder with Valve SAIF50X250-08B
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.