Airtac BESL Throttle Type Silencer BESL03-S
SUS304 stainless variant (-S)The AirTAC Airtac BESL Throttle Type Silencer BESL03-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 BESL03-S
The BESL03-S sits on the exhaust port of a 3/8in valve and does two jobs at once. It breaks up the pressure pulse that makes the crack of escaping air, and its built-in adjustable throttle lets you set how fast the cylinder vents. The stainless body carries a brass-particle sintered silencing ring that delivers 20 dB of noise reduction at 0.5 MPa, and a simple adjuster changes the exhaust restriction without tools.
The -S suffix means the body and adjusting parts are SUS304 stainless steel instead of aluminium alloy. That matters wherever wash-down, salt air, plating fumes or chemical splash would pit a standard aluminium silencer. Thread is PT 3/8in. The body is also length-adjustable, so you can pull it back to clear a guard or a neighbouring fitting.
Airtac BESL Throttle Type Silencer BESL03-S Technical Specifications
| Model | Airtac BESL Throttle Type Silencer BESL03-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 BESL03-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 BESL03-S Is Used
Wash-down food packaging lines
Cylinders on tray fillers and carton erectors get hosed down every shift. The SUS304 body of the BESL03-S shrugs off water and cleaning chemicals that would corrode an aluminium silencer on the 3/8in valve exhaust.
Cylinder speed tuning on press tooling
On a pneumatic press or clamp fixture, the adjustable exhaust throttle sets how fast the ram retracts while the sintered ring cuts 20 dB of valve exhaust noise at 0.5 MPa, all in one fitting on the 3/8in port.
Plating and chemical process rigs
Fume-laden air around plating tanks and chemical dosing stations eats bare aluminium. A stainless exhaust silencer on the process valves keeps the pneumatics serviceable where a standard body would pit and fail.
Is the Airtac BESL Throttle Type Silencer BESL03-S the Right Part?
Stainless BESL units give 15 dB on the M5 thread and 20 dB on the 1/8in to 1/2in sizes, so this 3/8in model carries the full 20 dB figure at 0.5 MPa. Step down to BESL02-S (1/4in) if your valve exhaust is smaller and you want a compact profile; step up to BESL04-S (1/2in) for larger valves. Moving a step changes the port you can seal against, and an undersized silencer restricts exhaust and slows the return stroke, so match the valve exhaust port rather than sizing down.
Pick BESL over plain BSL-S when you want to tune cylinder speed on the exhaust side as well as silence it, saving a separate flow-control fitting. If your air stays dry and the environment is benign, the aluminium BESL03 is the lighter-choice alternative; choose this -S version when corrosion, not weight, drives the decision.
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 BESL03-S FAQ
Working pressure 0-1.0 MPa (0-10 kgf/cm2), negative pressure -750 mmHg (10 Torr), proof pressure 1.5 MPa, operating temperature -20 to +70 C. Noise reduction at 0.5 MPa is 20 dB, the stainless-family figure for the 1/8in to 1/2in sizes. This SKU has a PT 3/8in thread, a SUS304 stainless body with brass-particle sintered silencing ring, and an adjustable exhaust throttle.
Often no. The BESL03-S combines silencing and exhaust-flow adjustment in one part, so on-outstroke or return-stroke speed can be tuned directly at the valve exhaust. It controls exhaust-side speed only, so if you need meter-in control on the supply side, keep a standard flow control valve in the circuit as well.
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