Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 500mm 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
- Stroke500 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B
The AirTAC SAIF40X500-08B is a double-acting ISO 15552 profile cylinder featuring an integrated 4M210-08 5/2 solenoid valve. This specific SKU is configured with a DC24V terminal electrical entry drawing 3.0 W, a PT1/4 cylinder port, and a 1/4 inch valve port. The built-in valve provides a 16.0 mm2 effective area (Cv 0.89) and cycles up to 5 times per second. Because the valve is mounted directly via a manifold block and short PU tubing (O8 x O5), it eliminates remote plumbing and saves panel space for decentralized machine stations.
While the bare cylinder body rates to 1.0 MPa, the practical operating pressure for this valved assembly is 0.15-0.8 MPa. Operating speed spans 30-800 mm/s. At 0.5 MPa, this 40 mm bore generates 628 N of push force and 528 N of pull force. By factory default, the piston rod retracts when the coil is energised, but you can reposition the valve to extend-when-energised. The 5/2 valve holds position via internal pilot pressure, not a spring, and the air cushions only decelerate the rod near stroke end, so it does not lock the load.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 500 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 SAIF40X500-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×500 | 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 SAIF40X500-08B Is Used
Decentralized Assembly Stations
Ideal for large machine layouts where running individual valve tubing is costly, using a single DC24V signal to actuate the 500 mm stroke locally.
Material Diversion
Provides 628 N push force at 0.5 MPa to deflect parts on a line, with the integrated 4M210 valve ensuring fast 5 cycle/sec response.
Space-Constrained Retrofits
Drops neatly into existing ISO 15552 footprint spaces while saving external panel space by self-managing its 1/4 inch air supply.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X500-08B the Right Choice?
Choose this self-valved SAIF40X500-08B when you need to cut tubing runs and wiring across a large machine, as one DC24V signal drives the cylinder directly. If your application requires higher thrust, stepping up to the 50 mm bore yields 982 N push at 0.5 MPa. If less force is acceptable, the 32 mm bore provides 402 N. Because the stroke is 500 mm, you must account for side-load forces and use a guide to prevent rod binding.
For load-holding applications, note that the built-in valve routes air but does not mechanically lock the piston; consider AirTAC SAIL or BSAI series for clamp-lock needs. When ordering a replacement, verify the 40 mm bore, 500 mm stroke, 1/4 inch valve port, DC24V voltage, terminal entry, PT thread, and the absence of a magnet (-S). Adding an -S magnet enables CMSE reed and DMSE electronic sensors for position feedback.
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 SAIF40X500-08B FAQ
The 40 mm bore generates 628 N push and 528 N pull force at 0.5 MPa. The built-in 4M210-08 valve has a 16.0 mm2 orifice (Cv 0.89) effective area.
The 5/2 valve holds its position via internal pilot pressure, not a mechanical lock, so it cannot hold a load without live pressure. By factory default, the rod retracts when the DC24V coil is energised, but you can reposition the valve to extend-when-energised.
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