Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B
The AirTAC Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B is a genuine double-acting ISO 15552 cylinder with a Ø40mm bore, 400mm 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
- Stroke400 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B
The AirTAC SAIF40X400-08B is a double-acting ISO 15552 profile cylinder featuring an integrated 4M210-08 5/2 solenoid valve. This specific configuration uses a DC24V terminal coil drawing 3.0 W, paired with a valve offering a 16.0 mm2 effective area (Cv 0.89). Because the manifold routes air through O8 x O5 PU tubing, the valve port differs from the cylinder's PT1/4 port. While the cylinder body rates to 1.0 MPa, the built-in valve limits the practical operating pressure to 0.15-0.8 MPa.
Generating 628N of push force at 0.5 MPa, this decentralized unit switches itself from a single coil signal, eliminating remote plumbing. The factory setting retracts the piston rod when the coil is energised, but you can reposition the valve to extend-when-energised. The carbon steel rod and standard PT tapered threads suit varied industrial environments.
Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B Technical Specifications
| Model | Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B |
|---|---|
| Series | SAIF ISO 15552 cylinder with valve |
| Bore size | Ø40 mm |
| Stroke | 400 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 SAIF40X400-08B
| SAIF | ISO 15552 cylinder with built-in 4M valve. |
|---|---|
| 40×400 | 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 SAIF40X400-08B Is Used
Decentralized Assembly Stations
Ideal for large machines where routing air lines to a central panel is costly, this cylinder switches locally via its DC24V terminal coil.
Material Diverting
Provides 628N push force at 0.5 MPa to actuate sorting gates directly on the conveyor frame, saving panel space.
Compact Packaging Lines
The integrated 4M210 valve and profile barrel minimize envelope size in tight retrofit spaces where a separate valve would not fit.
Is the Airtac SAIF Series Standard Cylinder with Valve SAIF40X400-08B the Right Choice?
Choose this self-valved SAIF40X400-08B when a machine layout demands decentralized stations without separate valve banks. If your application requires higher thrust, stepping up to the bore 50 variant yields 982N of push force at 0.5 MPa; conversely, dropping to a bore 32 unit offers 402N for lighter duties. For this 400mm stroke, ensure external guide bushings are used to handle side loads and prevent rod binding.
Replacement matching requires the exact 40mm bore, 400mm stroke, 4M210-08 valve port, DC24V voltage, terminal entry, and PT thread. Note that neither the 5/2 valve nor the adjustable air cushions hold a load without live pressure; for true mechanical locking, select the SAIL or BSAI series instead.
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 SAIF40X400-08B FAQ
The 40mm bore generates 628N push force at 0.5 MPa and 879N at 0.7 MPa. The built-in 4M210-08 valve has a 16.0 mm2 orifice with a Cv of 0.89.
No, the 5/2 valve routes air but does not lock the load. By default, the rod retracts when the DC24V coil is energised, but it can be repositioned to extend-when-energised. Use SAIL for load holding.
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