Airtac BSL General Purpose Silencer BSL04
The AirTAC Airtac BSL General Purpose Silencer BSL04 is a genuine universal silencer that cuts exhaust noise by 13 dB at 0.5 MPa using a sintered brass sound-absorbing cover in an aluminium-alloy body.
- TypeUniversal silencer
- SeriesBSL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Noise reduction13 dB
- Temperature-20 to +70 °C
- No minimum order. A single piece can be ordered.
- Ready in 3–5 business days. That is the time we take to process the order and hand it to the carrier. Transit time after that depends on the destination.
About the Airtac BSL General Purpose Silencer BSL04
Every time a directional valve dumps a 1/2" port, the trapped air expands in one sharp pulse and you hear the crack. The BSL04 screws straight onto that exhaust port and breaks the pulse up inside a brass-particle sintered sound-absorbing cover, dropping exhaust noise by 13 dB at 0.5 MPa. The thread is PT 1/2", the largest size in the BSL ladder.
What sets this series apart is the element material. Where resin silencers can shatter under a knock or soften near heat, BSL04 pairs an aluminium-alloy body with a sintered brass cover that shrugs off impact, hot dirty exhaust and rough handling on the factory floor. That toughness is exactly why the BSL line is the default choice on heavy machinery.
Airtac BSL General Purpose Silencer BSL04 Technical Specifications
| Model | Airtac BSL General Purpose Silencer BSL04 |
|---|---|
| Type | Universal silencer |
| Series | BSL |
| Noise reduction | 13 dB at 0.5 MPa |
| Element | Sintered brass sound-absorbing cover in an aluminium-alloy body |
| Working pressure | 0 - 1.0 MPa (0 - 10 kgf/cm2) |
|---|---|
| Negative pressure | -750 mmHg (10 Torr) |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Thread standard | PT (Rc tapered) unless the code says otherwise |
POM release button and chuck, aluminium-alloy guide, stainless spring gasket, NBR O-ring; body brass or PBT depending on the part. AirTAC publishes flow as a characteristic curve rather than a single figure, so no L/min value is listed.
Model Code: Airtac BSL General Purpose Silencer BSL04
| BSL | Universal silencer. |
|---|---|
| 01 / 02 / 03 / 04 | Thread: 1/8", 1/4", 3/8", 1/2". M5 where the series offers it. |
| D | Black. Blank = grey. |
Choosing a Silencer
- check Sintered-brass types (BSL / BSLM / BESL) give 13 dB and take rough treatment.
- check Resin types (PAL / PALM / PPA) give 25 dB and weigh far less.
- check PPA plugs straight into a tube instead of a thread, and is copper-free for sensitive processes.
- check BESL adds an adjustable throttle, so it silences AND sets exhaust speed in one part.
- check An undersized or clogged silencer shows up as a slow return stroke - size it to the valve's exhaust port.
Where the Airtac BSL General Purpose Silencer BSL04 Is Used
Canning line valve bank
On a food-canning conveyor the valve island sits at waist height beside the operators, and each cycle dumps a 1/2" exhaust a few hundred times per shift. A BSL04 on every exhaust port removes the crack without adding a part operators can snap off.
Press-shop clamping cylinders
Large-bore clamping cylinders on a stamping press breathe hard through 1/2" ports. Sintered brass survives the oil mist and heat around the press, where a plastic silencer would age and split.
Concrete block plant noise audit
A block-making plant brought under a workplace noise limit can cut the sharpest, most irritating component first - valve exhaust - by fitting BSL04 across the mould-cylinder valves before touching the bigger fans and vibrators.
Is the Airtac BSL General Purpose Silencer BSL04 the Right Part?
The catalogue gives you two noise figures and a clear trade-off: 13 dB from sintered brass parts like this one, 25 dB from the resin PAL series. Choose metal where the silencer gets knocked, run hot or sits in dirty air; choose resin where the noise target is aggressive and weight does not matter. If you also need to set the exhaust speed of the cylinder, step up to the BESL04, which adds an adjustable throttle to the same 1/2" thread and the same 13 dB element.
BSL04 is the top of the series ladder (M5, 01, 02, 03, 04), so the only smaller neighbour is BSL03 at 3/8". Stepping down loses exhaust area, so do not size down to save space - size the silencer to the valve's exhaust port itself. An undersized or clogged silencer restricts exhaust and visibly slows the return stroke of the cylinder it feeds.
Quick checklist
- ✓ Tube outside diameter matches exactly
- ✓ Thread size and standard match the port
- ✓ Working pressure within 0 - 1.0 MPa (0 - 10 kgf/cm2)
- ✓ Temperature within -20 to +70 °C
- ✓ Noise target: 13 dB metal or 25 dB resin
Airtac BSL General Purpose Silencer BSL04 FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2); usable under vacuum to -750 mmHg (10 Torr); proof pressure 1.5 MPa; operating temperature -20 to +70 C. This BSL04 is the 1/2" PT-threaded member of the series and achieves a 13 dB noise reduction at 0.5 MPa using its brass-particle sintered element.
Both fit a 1/2" thread and both deliver 13 dB at 0.5 MPa. The BESL04 adds an adjustable exhaust throttle, so it also sets the cylinder's exhaust speed; the BSL04 is the plain, lighter option when you only need quiet exhaust. If speed control is already handled elsewhere in the circuit, the BSL04 is the simpler choice.
Authorized Export Seller
Genuine AirTAC parts produced by AirTAC factory.
1-Year Warranty
Covers non-human-caused product damage.
Fast Dispatch
Standard parts are processed and dispatched in 3-5 business days.
Fast Reply
Most inquiries answered within 7-8 hours.
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