Core points
- Both families are porous sintered media, but the temperature ceiling decides first: porous PE/plastic grades derate above roughly 80-90 °C, while sintered bronze works to about 200 °C in oxidising atmospheres [SourceBySpec silencer selection notes].
- Weight and cost favour plastic: a typical G1/4 sintered-PE silencer weighs roughly 3-8 g versus 25-60 g for a bronze equivalent [SourceBySpec silencer selection notes] - and plastic media avoids certain corrosion mechanisms entirely.
- Regulated industries favour sintered plastic: BROLERN plastic media is produced in GMP and FDA compliant material grades, which bronze cannot match for food and medical contact.
- Both media combine filtration and silencing in one part - uniform pores diffuse exhaust noise while capturing particles.
- BROLERN moulds both families to customer drawings, with matched tooling kept in house.
The selection table
| Temperature ceiling | Sintered PE/plastic: about 80-90 °C continuous; sintered bronze: about 200 °C (oxidising) |
|---|---|
| Material compliance | Plastic: GMP / FDA grades available; bronze: RoHS compliant |
| Weight (G1/4 part) | Plastic 3-8 g; bronze 25-60 g [SourceBySpec silencer selection notes] |
| Corrosion behaviour | Plastic: immune to most electrochemical corrosion; bronze: resists moisture-laden exhaust |
| Filtration rating | Plastic: down to 0.1 µm (BROLERN); bronze: about 0.5 µm |
| Best duty | Plastic: medical, food, pharma, lightweight OEM; bronze: hot or oily pneumatic exhaust |
How to decide in three questions
First, what is the exhaust temperature? Above roughly 80 °C continuous, bronze or stainless wins. Second, does the part touch food, medical or pharma media? GMP/FDA plastic grades are the compliance route. Third, is the design weight or cost sensitive? Porous plastic cuts mass by an order of magnitude on small ports, which compounds across valve manifolds [SourceBySpec silencer selection notes]. A complete RFQ should also state the medium, flow rate, pressure and connection thread - the standard OEM checklist used across the porous plastics industry [Lvyuan sintered porous plastic guide].
FAQ
Can sintered plastic survive the same pressures as bronze?
For typical pneumatic exhaust duties (well under 10 bar), yes. For high-pressure or hot media, bronze or stainless is the safer specification.
Which one silences better?
Both diffuse exhaust through controlled porosity; attenuation is driven by pore grade and part size rather than material family. Typical valve-exhaust reduction is 15-30 dB when correctly sized [SourceBySpec silencer selection notes].
Can BROLERN make custom shapes?
Yes - complete mould sets in house, production from drawing or sample, rods/tubes/sheets/special shapes.
Conclusion
Pick sintered plastic for compliance, weight and chemistry; pick sintered bronze for heat and traditional pneumatic exhaust duty. Send us the medium and temperature and we will name the family in one reply.