Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 50mm 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.
- BoreØ40 mm
- Stroke50 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B
The AirTAC SAIF40X50S-08B is a double-acting ISO 15552 profile cylinder equipped with a built-in 4M210-08 5/2 solenoid valve, offering a Cv of 0.89 and a 16.0mm2 orifice. Driven by a DC24V terminal coil drawing 3.0W, it features an IP65 rating and a rapid 0.05s activation time. The assembly includes a -S magnet for position sensing with AirTAC CMSE reed and DMSE electronic switches. Because the valve operates at 0.15-0.8 MPa, this defines the practical working pressure range for the unit, even though the bare cylinder rates to 1.0 MPa.
At 0.5 MPa this 40mm bore generates 628N of push force and 528N of pull force. The manifold connects to the cylinder via PU tubing (O8xO5), and the valve port (1/4") differs from the cylinder port (1/4"). 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 valves, cutting tubing and panel space for decentralized machine stations.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 50 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 | 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 (Ø40mm)
| 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.
Model Code: Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×50 | 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 SAIF40X50S-08B Is Used
Decentralized Assembly Stations
Eliminates the need for a remote valve bank, allowing independent control of multiple actuators across a large machine frame using a single DC24V signal.
Space-Constrained Machinery
The integrated manifold block saves valuable panel space and reduces plumbing complexity in tight equipment layouts.
Retrofit Automation
Ideal for upgrading existing lines where routing new pneumatic tubing to a central valve island would be prohibitively expensive or physically impossible.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X50S-08B the Right Choice?
Choose this 40mm bore when your application requires around 628N push force at 0.5 MPa; step down to a 32mm bore (402N push) for lighter loads, or up to a 50mm bore (982N push) for higher thrust. The SAIF40X50S-08B is ideal for space-tight machines where running separate valve tubing is costly, as it switches itself from one DC24V coil signal. Remember that the built-in 5/2 valve routes air and is not a lock; if you need to hold a load without live pressure, look at the SAIL lock or BSAI clamp-lock series. When replacing, match the 40mm bore, 50mm stroke, 1/4" valve port, DC24V voltage, terminal entry, PT thread, and -S magnet exactly.
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 SAIF40X50S-08B FAQ
The 40mm bore provides 628N push and 528N pull force at 0.5 MPa. The built-in 4M210-08 valve has a 16.0mm2 orifice with a Cv of 0.89, supporting a maximum frequency of 5 cycles per second.
It uses a 5/2 solenoid valve that holds its position by pilot pressure, not a spring. The factory setting retracts the rod when the DC24V coil energises, but you can reposition the valve to extend-when-energised. No separate remote valve is needed.
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