Airtac BESL Throttle Type Silencer BESL01-S
SUS304 stainless variant (-S)The AirTAC Airtac BESL Throttle Type Silencer BESL01-S is a genuine throttling silencer that cuts exhaust noise by 20 dB at 0.5 MPa using a copper-particle sintered element in a SUS304 body.
- TypeThrottling silencer
- SeriesBESL
- 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 BESL Throttle Type Silencer BESL01-S
A throttling silencer sits on a valve exhaust port and does two jobs at once: it breaks up the pressure pulse that makes escaping air crack, and it meters the exhaust flow so the cylinder returns at a controlled speed instead of slamming home. The BESL01-S does this with a SUS304 stainless body and a sintered sound-absorbing ring, reaching 20 dB of noise reduction at 0.5 MPa. The stainless body is what separates it from the standard BESL: it resists wash-down chemicals, salt-laden air and repeated rinsing that would pit and stain an aluminium housing.
The other distinction is the built-in adjustable exhaust throttle. Turn the adjuster and you change the exhaust restriction, setting cylinder return speed without buying and plumbing a separate speed controller. The stainless body is also adjustable in length: BESL01-S spans roughly 33 mm when screwed down to 40.5 mm at maximum, so it clears tight guards where a fixed-length silencer would foul.
Airtac BESL Throttle Type Silencer BESL01-S Technical Specifications
| Model | Airtac BESL Throttle Type Silencer BESL01-S |
|---|---|
| Type | Throttling silencer |
| Series | BESL |
| 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 BESL Throttle Type Silencer BESL01-S
| BESL | Throttling 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 BESL Throttle Type Silencer BESL01-S Is Used
Food-line valve bank under daily hose-down
On a dairy packaging machine the exhaust bank is rinsed with caustic foam every shift. The SUS304 body of the BESL01-S shrugs off the wash while the built-in throttle softens the cylinder return that would otherwise bang the gripper home.
Marine deck actuation near salt spray
Hatch and gate cylinders on a workboat exhaust through fittings exposed to salt air. Aluminium silencers stain and seize here; the stainless BESL01-S threads into the 1/8in exhaust port and keeps both the noise and the corrosion down.
Chemical rinse station exhaust quieting
A plating-shop rinse jig cycles fast and loud, and the mist attacks bare alloy. Fitting the BESL01-S trims exhaust noise by 20 dB at 0.5 MPa and lets the technician dial the jig's return speed back to stop splashing.
Is the Airtac BESL Throttle Type Silencer BESL01-S the Right Part?
The BESL range starts at 01 (1/8in) - there is no M5 version in this series - so BESL01-S is the smallest stainless throttling silencer AirTAC makes. The next step up is BESL02-S at 1/4in. Step up when the valve exhaust port is 1/4in or when you want more exhaust opening area behind the throttle, because a silencer threaded down to a smaller port than the valve's own exhaust is the classic cause of slow return strokes. Size to the port, not below it.
Choose the -S over the standard BESL01 when the valve bank gets hosed down, sits near the sea, or lives in a chemical mist; the ratings are identical (0-1.0 MPa working, 1.5 MPa proof, -20 to +70 C) so you pay only for corrosion resistance. If you need silencing but no speed control, the plain BSLM01-S is the shorter option; if you need both jobs in one part on a clean indoor line, the standard BESL01 does the same at lower cost.
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 BESL Throttle Type Silencer BESL01-S FAQ
Thread: 1/8in PT (code 01), the smallest size in the BESL series. Body: SUS304 stainless steel with a sintered sound-absorbing ring. Noise reduction: 20 dB at 0.5 MPa (the stainless BESL figure on 1/8in to 1/2in threads). Working pressure: 0-1.0 MPa (0-10 kgf/cm2). Vacuum: -750 mmHg (10 Torr). Proof pressure: 1.5 MPa. Temperature: -20 to +70 C. Adjustable length: about 33 mm minimum to 40.5 mm maximum.
Thread it onto the valve exhaust port and turn the adjuster ring: more restriction slows the cylinder return, less restriction lets it run free, and the silencing element keeps working at every setting. Check the valve's exhaust thread first - BESL starts at 1/8in with no M5 option, so an M5 port needs a different solution, and stepping down below the port size will choke the exhaust.
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