Airtac BESL Throttle Type Silencer BESL02
The AirTAC Airtac BESL Throttle Type Silencer BESL02 is a genuine throttling silencer that cuts exhaust noise by 13 dB at 0.5 MPa using a sintered brass silencer ring with an adjustable exhaust throttle.
- TypeThrottling silencer
- SeriesBESL
- 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 BESL Throttle Type Silencer BESL02
The BESL02 sits on the exhaust port of a 1/4in PT valve and does two jobs that normally need two parts. A brass-particle sintered ring breaks up the pressure pulse that makes the crack of venting air, cutting noise by 13 dB at 0.5 MPa, while a built-in adjustable throttle lets you dial the exhaust back to slow a cylinder's return stroke.
The body and adjusting parts are aluminium alloy, and the whole assembly is adjustable in length - the BESL01, for example, spans 33 mm at minimum to 40.5 mm at maximum - so it can be backed off to clear neighbouring fittings on a crowded manifold. Because the orifice is set by hand, the same part silences a fast-venting 1/4in valve on Monday and paces a gentle retraction on Tuesday without swapping anything.
Airtac BESL Throttle Type Silencer BESL02 Technical Specifications
| Model | Airtac BESL Throttle Type Silencer BESL02 |
|---|---|
| Type | Throttling silencer |
| Series | BESL |
| Noise reduction | 13 dB at 0.5 MPa |
| Element | Sintered brass silencer ring with an adjustable exhaust throttle |
| 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 BESL Throttle Type Silencer BESL02
| 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. |
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 BESL02 Is Used
Pneumatic press in a stamping shop
On a metal press the return stroke must be paced and the exhaust is loud. The BESL02's throttle sets retraction speed while the sintered brass ring absorbs the 1/4in valve's discharge, and the element survives the hot, oily air around presses that would degrade a resin silencer.
Bottling line valve manifold
Operators stand beside a bottling conveyor's valve bank all shift, and every cylinder dump adds to the noise floor. A BESL02 on each 1/4in exhaust port trims 13 dB at 0.5 MPa per valve, and its adjustable length backs off where fittings crowd the manifold.
Woodworking CNC dust zone
Fine dust clogs open exhausts and forces early replacement. The sintered brass element on the BESL02 tolerates dirty shop air better than resin, and the hand-set throttle keeps a clamping cylinder from slamming shut at the end of each cycle.
Is the Airtac BESL Throttle Type Silencer BESL02 the Right Part?
Pick metal when the part will be knocked, run hot or sit in oily air - sintered brass shrugs off conditions that would age a resin body. Pick resin when noise is the top priority: the PAL series reaches 25 dB at 0.5 MPa but has no throttle, so choose BESL02 when you want silencing and exhaust-speed control in one fitting. If a 1/4in port is oversize for the job, BESL01 (1/8in) steps down; BESL03 (3/8in) and BESL04 (1/2in) step up. Note there is no M5 in this series, so panel valves on M5 exhausts need the BSLM line instead. Always match the silencer to the valve's exhaust port rather than sizing down - a throttled undersized silencer chokes the exhaust and drags the return stroke out.
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 BESL02 FAQ
Working pressure is 0-1.0 MPa (0-10 kgf/cm2) with vacuum capability to -750 mmHg (10 Torr). Proof pressure is 1.5 MPa and the temperature range is -20 to +70 C. The connection is 1/4in PT thread, and the sintered brass element gives a noise reduction of 13 dB at 0.5 MPa. The exhaust orifice is adjustable, so effective flow depends on the throttle setting rather than a fixed rating.
The adjusting part on the BESL02 restricts only the exhaust path; the brass sintered ring stays in the flow regardless of setting. Start with the throttle open, then close it gradually until the cylinder's return speed is where you want it. If the stroke becomes sluggish before the speed you need, the silencer is undersized for the valve's exhaust port - step up to BESL03 (3/8in) rather than running the throttle wide open on a starved exhaust.
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