Silencers DSA/FPR – DDA/FPD

Reactive silencers reduce noise by reflecting and cancelling sound waves through internal chambers and tuned geometries. Instead of absorbing sound energy, they use changes in cross-section and flow direction to create destructive interference. They are particularly effective at low and medium frequencies and are commonly used in exhaust systems for engines, compressors, and industrial processes.

DSA/FPR

Twin chambers – provides 25 dB(A) attenuation

DDA/FPD

Triple chambers – provides 30dB(A) attenuation

Connections

1,5” to 3”, B:S:P: nipple connetion
3,5” to 7”, flanges acc.to DIN2573 (PN6)
8” and larger, flanges acc.to DIN86044

Material

Standard material: mild steel with black heat-resistant paint.
Other materials upon request: Cor-Ten or Stainless Steel in grades 304L, 316L & 409

Additional options

Alternative configurations are available on request, including mating flange assemblies, lifting lugs, and support feet for both horizontal and vertical installations.

Key features and benefits:

• Chambered design: Utilizes expansion chambers, baffles, and resonators to reflect and cancel sound waves.
• Applications: Well suited for engine exhausts, generators, compressors, and other equipment with dominant low-frequency noise.
• Materials: Typically constructed from robust steel or stainless steel to withstand high temperatures, pressures, and corrosive environments.
• Performance: Most effective at attenuating low-frequency noise, where absorptive silencers are less efficient.

Difference from other silencers:
Unlike absorptive silencers, which dissipate sound energy as heat, reactive silencers reflect and interfere with sound waves, making them particularly suitable for low-frequency noise control but generally less effective at higher frequencies.