Airtac BSL General Purpose Silencer BSL04-S
SUS304 stainless variant (-S)The AirTAC Airtac BSL General Purpose Silencer BSL04-S is a genuine universal silencer that cuts exhaust noise by 20 dB at 0.5 MPa using a copper-particle sintered element in a SUS304 body.
- TypeUniversal silencer
- SeriesBSL
- Working pressure0 - 1.0 MPa (0 - 10 kgf/cm2)
- Proof pressure1.5 MPa
- Noise reduction20 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-S
The BSL04-S screws onto a 1/2in PT exhaust port and does one job: it breaks up the pressure pulse that leaves a valve as a sharp crack every time the cylinder vents. Exhaust air spreads through a sintered sound-absorbing element held in a SUS304 stainless body, cutting noise by 20 dB measured at 0.5 MPa.
The -S suffix swaps the standard aluminium-alloy body for SUS304 stainless steel, so the part stands up to daily hose-down, salt-laden air and mild chemical splash that would pit the standard casting. AirTAC keeps the external shape identical to the standard BSL04, and the stainless build is listed as suitable for copper-prohibited working conditions.
Airtac BSL General Purpose Silencer BSL04-S Technical Specifications
| Model | Airtac BSL General Purpose Silencer BSL04-S |
|---|---|
| Type | Universal silencer |
| Series | BSL |
| Noise reduction | 20 dB at 0.5 MPa |
| Element | Copper-particle sintered element in a sus304 body |
| Body material | Stainless steel 304 (-S variant) |
| 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. Stainless (-S): SUS304 silencer body. The sound-absorbing element remains copper-particle sintered, so this variant is specified for corrosion resistance rather than as a wholly copper-free 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-S
| 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. |
| -S | Stainless-steel body. |
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-S Is Used
Cannery wash-down valve bank
On a tuna or vegetable canning line the valve bank sits within reach of the daily hose-down, so the standard aluminium body would corrode within months. The SUS304 BSL04-S shrugs off the wash while cutting the 1/2in exhaust crack beside the operators.
Harbour dredger deck winch
Salt spray and damp marine air attack painted aluminium quickly. Fitting the stainless BSL04-S to the deck winch's directional valve exhaust keeps the vent quiet and stops the silencer seizing solid with rust on a salt-air workboat.
Outdoor chemical dosing skid
A dosing skid venting solenoid valves beside acid and alkali storage needs a body that tolerates splash and a winter range down to -20 C. The BSL04-S covers both without needing a protective shroud over the exhaust.
Is the Airtac BSL General Purpose Silencer BSL04-S the Right Part?
Metal versus resin is the first decision. This stainless sintered element is rated 20 dB at 0.5 MPa; AirTAC's resin PAL line reaches 25 dB, so resin wins where the noise floor matters most and the part will not be knocked. Metal is the right call where the silencer takes impact, runs hot or dirty, or sits in a wash-down area that would clog or crack a plastic body. If you also need to set cylinder exhaust speed, step to the BESL series, which adds an adjustable throttle to the silencing element.
The BSL ladder runs M5, 01 (1/8in), 02 (1/4in), 03 (3/8in) and 04 (1/2in), so 04 is the top of the range and there is no larger step. The neighbour down is the BSL03 with a 3/8in thread and a smaller exhaust opening, which puts backpressure behind the valve. Match the silencer thread to the valve's exhaust port rather than sizing down to save space.
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-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2); negative pressure down to -750 mmHg (10 Torr); proof pressure 1.5 MPa; operating temperature -20 to +70 C. This SKU carries a 1/2in PT thread on a SUS304 stainless body, and the stainless element gives a 20 dB silencing effect at 0.5 MPa.
You can, but it costs cycle time. The nearest smaller stainless model, the BSL03, has a 3/8in thread and a narrower exhaust opening, which adds backpressure so the cylinder vents slower and the return stroke drags. A silencer that is undersized, or simply clogged with dirt, produces the same symptom. AirTAC publishes flow for these parts as characteristic curves only, so the dependable rule is to match the valve's exhaust port size - 1/2in here - and replace the element once exhaust becomes noticeably sluggish.
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.
Related AirTAC Silencers
Request a Quote for Airtac BSL General Purpose Silencer BSL04-S
Send us the quantity and destination. We confirm price, stock and lead time — usually within 7-8 hours.