AirTAC BESL Throttle Silencer, 1/8" to 1/2"
Every stocked AirTAC BESL on one page: 4 order codes, from $8.78. Pick the thread to see the exact order code and price.
Sintered brass element
Aluminum alloy body
This combination is not a stock order code. Request a quote and we will confirm availability and price.
- 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
The AirTAC BESL is a sintered-brass exhaust silencer with a throttle screw that also sets the exhaust flow. Screwed into a valve or cylinder exhaust port, it cuts exhaust noise by about 13 dB at 0.5 MPa and keeps dirt out of the port. Turning the adjusting cap throttles the exhaust, so it doubles as a simple speed control; the locking cap holds the setting.
The body is aluminum alloy and the element sintered brass. It works up to 1.0 MPa (vacuum to -750 mmHg) at -20 to +70 °C. Threads: PT 1/8", PT 1/4", PT 3/8", PT 1/2".
BESL Technical Specifications
| Model | BESL |
|---|---|
| Type | Throttle Silencer |
| Silencing effect | 13 dB at 0.5 MPa |
| Thread | PT 1/8", PT 1/4", PT 3/8", PT 1/2" |
| Operating pressure | 0 – 1.0 MPa |
|---|---|
| Vacuum | -750 mmHg (10 Torr) |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Body / element | Aluminum alloy / sintered brass |
Source: AirTAC catalog P300-P301 (BESL ordering code, specifications and dimensions).
How the BESL Order Code Is Built
| BESL | Throttle Silencer |
|---|---|
| 01 / 02 / 03 / 04 | Thread: 01 = PT 1/8"; 02 = PT 1/4"; 03 = PT 3/8"; 04 = PT 1/2" |
All AirTAC BESL Order Codes (4)
Each order code links to its own datasheet page. Use Select to load it into the configurator above.
| Order code | Thread | Element | Body | Price | Select |
|---|---|---|---|---|---|
| BESL01 | PT 1/8" | Sintered brass element | Aluminum alloy body | $8.78 | |
| BESL02 | PT 1/4" | Sintered brass element | Aluminum alloy body | $9.79 | |
| BESL03 | PT 3/8" | Sintered brass element | Aluminum alloy body | $11.30 | |
| BESL04 | PT 1/2" | Sintered brass element | Aluminum alloy body | $13.82 |
Need a combination that is not listed? Request a quote.
Where the BESL Is Used
Valve exhaust
Quietens the exhaust ports of solenoid and air-piloted valves.
Port protection
Keeps dust out of open exhaust ports.
Exhaust throttling
Sets the exhaust flow, and with it cylinder speed.
Choosing the Right BESL Configuration
Choose the thread to match the exhaust port: PT 1/8", PT 1/4", PT 3/8", PT 1/2".
Overall length (mm): PT 1/8" 33 – 40.5, PT 1/4" 35 – 42.5, PT 3/8" 41.5 – 49, PT 1/2" 52 – 59.5 (shortest to longest with the throttle closed or open).
AirTAC BESL FAQ
About 13 dB of silencing effect at 0.5 MPa.
01, 02, 03 and 04 are PT 1/8", 1/4", 3/8" and 1/2".
0 to 1.0 MPa, vacuum to -750 mmHg, proof pressure 1.5 MPa, -20 to +70 °C.
No. You can order a single piece. Orders are processed and handed to the carrier within 3-5 business days.
Buying the BESL from AirtacDistr
Genuine AirTAC parts
Every order code on this page is the AirTAC factory part number. Specifications follow the AirTAC Products Catalog 2026A. About us
Ready in 3-5 business days
That is our time to process the order and hand it to the carrier. No minimum order: a single piece can be ordered.
14-day returns, 1-year warranty
Return within 14 days of delivery; the buyer pays return shipping. The warranty covers defects not caused by misuse. Return policy
Engineering help
Send your application details and we will confirm the right order code, usually within 7-8 hours. Ask us
Page data checked against the live catalog on 2026-11-11.
Request a Quote for the BESL
Send the order code, quantity and destination. We confirm price, stock and lead time, usually within 7-8 hours.