This model is discontinued
AirTAC has phased out the MAL series. The drop-in replacement is B04-SAI80X200S — same bore, stroke, output force, port and mounting, so it fits the same application. Simply order the B04-SAI80X200S in place of this model. The SAI replacement keeps the same ISO 15552 mounting interface, bore, stroke, output force and accessories, so it drops straight into existing fixtures. It is the current-production version of this cylinder with an upgraded piston seal.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S
The AirTAC Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S is a double-acting ISO 15552 (orig. ISO 6431) profile-barrel cylinder with a Ø80mm bore and 200mm stroke, G3/8 air ports and adjustable end cushioning. This model is discontinued — the drop-in replacement is the B04-SAI80X200S, which matches its ISO interface, bore, stroke, force and mounting.
- BoreØ80 mm
- Stroke200 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- StatusDiscontinued → B04-SAI80X200S
About the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S
The AirTAC B04-SI80X200S is a discontinued double-acting ISO 15552 profile cylinder. The B04- prefix marks it as the construction-machinery dedicated variant of the SI80X200S, mechanically identical to the base model with a 2513 N push force at 0.5 MPa. AirTAC replaced this EOL unit with the SAI80X200S, a true drop-in sharing the same 80mm bore, 200mm stroke, G3/8 port and ISO 15552 mounting interface.
The SAI upgrade features a new piston seal with two Y-shaped one-way elements for low start-up pressure and long life. For this bore class, a safe working load is roughly 1508 N (about 60% of the 0.5 MPa push force), yielding a vertical lift capacity of approximately 128 kg with a 2:1 margin. The SAI family also adds SAIL, SAIF and BSAI lock variants the SI lacked. This -S SKU includes a magnet for CS1-B/DS1-B switches.
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S Technical Specifications
| Model | Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S |
|---|---|
| Series | SI ISO 15552 profile cylinder (discontinued) |
| Replacement | B04-SAI80X200S |
| Bore size | Ø80 mm |
| Stroke | 200 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max standard stroke | Up to 1500 mm |
Specifications follow the official AirTAC SI datasheet (now discontinued). The B04-SAI80X200S carries the same ISO 15552 ratings. Confirm against the product label before installation. Thread options: PT / G / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
The B04-SAI80X200S produces the same force from the same bore — a true drop-in on output. Actual usable force is lower than theoretical; size with a margin.
Model Code: Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S
| SI | ISO 15552 profile-barrel cylinder (discontinued). |
|---|---|
| 80 | Bore size in mm. |
| ×200 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Legacy SI-family variants: SID (double rod), SIJ (adjustable stroke) — each maps to its SAI equivalent (SID→SAID, SIJ→SAIJ). Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B).
Where the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S Is Used
Excavator Actuation
Drives auxiliary covers or separation gates on heavy equipment, utilizing the 2513 N push force to move robust construction-machinery components reliably.
Concrete Dispenser
Operates flow-control valves on batching systems for heavy-equipment manufacturing, where the 128 kg vertical lift capacity easily manages heavy gate weights.
Crusher Feed Control
Regulates material infeed gates on aggregate processing machinery, benefiting from the adjustable 36mm air cushions to decelerate the 25mm rod smoothly.
Replacing the Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S with the B04-SAI80X200S
To replace the B04-SI80X200S, order the SAI80X200S. Confirm the ISO 15552 mounting interface, 80mm bore, 200mm stroke, G3/8 port, and mounting accessory. The -S suffix means a piston magnet is present for CS1-B/DS1-B switches; the SAI replacement uses current AirTAC switches. If sizing alternatives, a 63mm bore yields 1559 N push at 0.5 MPa, while a 100mm bore yields 3927 N. A plain cylinder drifts on air loss—the cushion only decelerates. For load holding, use an external rod lock, pilot check valve, or the SAIL/BSAI lock variant. At 200mm stroke, side-load is minimal, but always guide the rod to prevent bending.
Replacement checklist
- ✓ Same ISO 15552 interface → B04-SAI80X200S
- ✓ Same bore / stroke / force
- ✓ Port/thread type (PT/G/NPT)
- ✓ Magnet (-S) for sensors?
- ✓ Mounting reused (FA/FB/CA/CB/CR/LB/TC)
Airtac B04-SI Construction Machinery Special ISO Standard Cylinder B04-SI80X200S FAQ
Yes, the B04-SI80X200S is discontinued. The exact drop-in replacement is the SAI80X200S. The B04- prefix simply denotes the construction-machinery dedicated variant of the SI80X200S. The SAI replacement shares the exact same ISO 15552 mounting interface, 80mm bore, 200mm stroke, output force, and G3/8 port, fitting existing fixtures perfectly.
The 80mm bore uses a G3/8 air port and a 25mm piston rod with an M20x1.5 thread. Force output is 2513 N push and 2268 N pull at 0.5 MPa, 3518 N push at 0.7 MPa, 4523 N push at 0.9 MPa, and a theoretical maximum of 513 kgf at 1.0 MPa. Operating speed is 30-800 mm/s.
Related AirTAC SAI Cylinders
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