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Reactive-absorptive mufflers - Model 343 and 353 industrial grade, all welded construction - dB Noise Reduction



  • Engine exhaust mufflers requiring substantial noise reduction
  • Intake and exhaust silencers on PD blowers operating above their critical speed
  • Compressor intake and exhaust silencers
  • Other applications where low frequency pulse control and high mid-upper band attenuation are both required

Design features

  • Multi-chamber reactive muffler section followed by an absorptive muffler section
  • Excellent noise reduction in all octave bands
  • Reactive section includes tuned chambers and perforated tubes to remove low frequency pulsations and noise
  • Absorptive section provided with an acoustic liner on Model 343 mufflers. Model 353 mufflers also include a center bullet
  • Acoustic media in absorptive section protected by high temperature cloth and 304 ss mesh liners
  • Custom designed and manufactured to meet the attenuation needs and pressure drop constraints of each application
  • End intake and exhaust, as well as side intake and exhaust connections available


  • Mounting brackets, support legs, saddles and feet for muffler installation
  • Tail pipes, rain cowls and caps
  • Access panels for inspection of internals
  • Companion flanges and expansion joints
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Reactive-absorptive muffler features

Reactive-absorptive muffler features   Reactive-absorptive muffler detailed features

Reactive-absorptive muffler features - image - dB Noise Reduction

Product details


Up to 60,000 acfm (standard)


Up to 120" wg


Up to 1,200° F


From 3" ID to 30" ID (standard)
Larger diameters available

Unit weight:

Up to 25,000 lbs


Carbon, stainless and corten steels


12 ga to 3/8" casings with 12 ga internals
designed for thermal expansion

Paint finishes:

High heat aluminum or black, as well as a variety
of low temperature paints

For other customized muffler designs, please contact us and we will be happy to assist you.


Servicing clients in the US, Canada, Mexico, and many international locations worldwide.