
The AirTAC Airtac BSLM Miniature Silencer BSLMM5 is a genuine mini silencer that cuts exhaust noise by 13 dB at 0.5 MPa using a sintered brass sound-absorbing element in an aluminium-alloy body.
The BSLMM5 is the M5-threaded, shortest-body member of AirTAC's BSLM mini silencer family. It screws onto a valve's exhaust port and breaks up the pressure pulse that otherwise leaves the port as a sharp crack of escaping air, cutting noise by 13 dB measured at 0.5 MPa. The sound-absorbing element is a brass-particle sintered cover, housed in a compact aluminium-alloy body.
What sets this SKU apart within the range is thread size, not body design: M5 is the smallest port in the BSLM ladder and is typical of small solenoid valves, pneumatic logic elements and compact cylinders whose exhaust ports are tapped M5 rather than carrying a taper pipe thread. The miniature form keeps the silencer from overhanging a small valve body.
| Model | Airtac BSLM Miniature Silencer BSLMM5 |
|---|---|
| Type | Mini silencer |
| Series | BSLM |
| Noise reduction | 13 dB at 0.5 MPa |
| Element | Sintered brass sound-absorbing element in an aluminium-alloy body |
| 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.
| BSLM | Mini silencer. |
|---|---|
| 01 / 02 / 03 / 04 | Thread: 1/8", 1/4", 3/8", 1/2". M5 where the series offers it. |
| D | Black. Blank = grey. |
Compact 5/2 and 3/2 solenoid valves with M5 exhaust ports cycle thousands of times per shift on small assembly stations. The BSLMM5 fits the tapped port directly without an adapter, shortening the valve's protruding stack.
Lab rigs and test fixtures built around M5-ported mini valves produce a sharp exhaust crack on every cycle a few feet from the operator's ear. A 13 dB sintered-brass attenuator tames it without a bulky fitting on a small device.
Vacuum generator and ejector assemblies on small pick heads exhaust through M5 ports in tight quarters. The short aluminium BSLM body silences each cycle without fouling nearby tooling or guards.
This is the bottom of the BSLM ladder. M5 is the smallest option, and the only step available from here is upward to BSLM01 (1/8 PT); there is no size below M5 in this series. Stepping up buys a larger exhaust area for bigger ports, but the 13 dB attenuation is common to every BSLM size, so choosing larger than the valve port does not buy extra quiet - it only adds bulk.
BSLM is the miniature body of the BSL universal silencer, so choose it where protrusion length matters. If you need 25 dB attenuation instead, the resin PAL family tops the sintered brass figure, though PAL starts at 1/8 PT with no M5 thread - a genuine reason M5 users stay on BSLM. Always size to the valve's exhaust port, not down to it: an undersized silencer throttles the exhaust and drags out the return stroke.
Quick checklist
BSLMM5 is a BSLM mini silencer with an M5 thread (standard PT series coding, M5 designated directly). 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 is 13 dB measured at 0.5 MPa, provided by the brass-particle sintered sound-absorbing cover on the aluminium-alloy body.
You can, but there is no acoustic benefit: every BSLM size delivers the same 13 dB at 0.5 MPa, so a larger body only adds protrusion. Fit the BSLMM5 directly to the M5 port. If the exhaust sounds strained or the stroke slows after fitting, the silencer is clogged or the port is undersized for the valve's flow demand - check the exhaust characteristic rather than stepping up a thread size.
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