Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B
The AirTAC Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B is a genuine double-acting profile-type cylinder with a Ø50mm 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.
- BoreØ50 mm
- Stroke400 mm
- Built-in valve4M210-08
- Valve port1/4"
- CoilDC24V
- EntryTerminal
About the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B
The SAUF50X400S-08B is a double-acting profile cylinder with a built-in AirTAC 4M210-08 5/2 solenoid valve on the cap. One DC24V coil signal drives the actuator, eliminating remote plumbing and saving a manifold slot. The extruded aluminum barrel is shorter than an ISO 15552 unit of the same bore. This 50mm bore uses a 1/4" cylinder port, a Ø20mm rod with an M16x1.5 thread, and 21mm adjustable cushions. The S suffix adds a piston magnet for CMSG/DMSG/EMSG switches.
Size force strictly within the assembled valve's 0.15-0.8 MPa window, never the 1.0 MPa cylinder body rating. At 0.5 MPa it delivers 982N push and 825N pull. The 1/4" valve port yields a 16mm2 flow (Cv 0.89) with a 5 cycle/s limit. Computed buyer insight: safe working load is roughly 589N (60% of the 0.5MPa push), and vertical lift is about 50kg with a 2:1 margin. It uses Ø8xØ5 PU tubing.
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B Technical Specifications
| Model | Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B |
|---|---|
| Series | SAUF profile cylinder with valve |
| Bore size | Ø50 mm |
| Stroke | 400 mm |
| Acting type | Double acting, self-valved |
| Cylinder port | 1/4" |
| 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 SAUF at 0.15–0.8 MPa. Default: rod retracts when the coil is energised (reconfigurable to extend). Specs follow the official AirTAC SAUF 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 SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B
| SAUF | Profile cylinder with built-in 4M valve. |
|---|---|
| 50×400 | Bore × stroke in mm. |
| -08 | Valve port 1/4" → 4M210-08. |
| B | Coil voltage DC24V. |
| I / (blank) | Terminal electrical entry. |
SAUF does not hold its load without air — the valve routes air, it is not a lock. For a held load, add an external rod lock or a pilot-operated check valve.
Where the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B Is Used
Divert Gate Actuation
Uses one coil signal to snap a sorting diverter without running tubing back to a central manifold.
Decentralized Pallet Stop
Mounts directly on a conveyor frame to raise and lower a pallet stop, saving a valve island slot.
Independent Clamp Station
Provides self-contained clamping on a multi-station machine where a remote valve would tangle air lines.
Is the Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B the Right Choice?
Compare neighbours: a 40mm bore gives 628N push at 0.5 MPa, while a 63mm bore provides 1559N. This 50mm bore hits 982N push and 825N pull at 0.5 MPa. Confirm the DC24V terminal entry and PT threads before ordering. The rod retracts when the coil energises; reposition the valve to switch to extend-when-energised. Because the built-in valve routes air, it cannot hold a load on pressure loss—add an external rod lock or pilot-operated check valve for suspended loads. For this 400mm stroke, fit external guides to prevent rod bending and side-load wear.
Quick checklist
- ✓ Force at 0.15–0.8 MPa
- ✓ Coil voltage matches panel
- ✓ Terminal vs grommet entry
- ✓ Retract- or extend-when-energised
- ✓ Load-holding → external rod lock
Airtac SAUF Series Valve-Mounted Air Cylinder SAUF50X400S-08B FAQ
It pushes 982N and pulls 825N at 0.5 MPa. The built-in valve is a 4M210-08 (1/4" port, Cv 0.89, 5 cycles/s max) running on DC24V. Size all forces within the valve's 0.15-0.8 MPa operating window, not the 1.0 MPa cylinder body rating.
Yes. The default action retracts the rod when energised, but you can reposition the built-in valve on the cap to make it extend-when-energised. This self-switching design removes the need for a remote valve.
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