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Industrial Exhaust Silencers

Industrial process silencers provided by SysTech attenuate noise from many types of industrial process equipment. Silencer design, with an understanding of the application, equipment, and process, is critical when it comes to meeting specific noise attenuation requirements.

There are three basic types of silencers:

  • Absorptive and dissipative silencers – are lined with sound absorbing materials such as mineral wool or fiberglass to attenuate sound waves. They are most effective with mid and high frequency noise.
  • Reactive chamber silencers – target low frequency noise. Multiple chambers with differing internal cross sections are used to reflect noise energy back to the source.
  • Absorptive/Reactive – A combination of both the absorptive and reactive designs. Design covers a broader range of frequencies to meet stricter attenuation requirements.

Positive Displacement (PD) Blower Silencers


PD Blower silencers are designed specific to their application, which is often times low frequency pulse noise. They may be a reactive or reactive-absorptive style depending upon where they are positioned in the process. Silencers may be positioned on the inlet or outlet, or on both, depending upon the process application.

Compressor Silencers


Reciprocating and centrifugal compressors may require reactive, reactive-absorptive or absorptive type silencers depending upon their frequency band noise characteristics.
Silencer design takes the following factors into account:

  • Configuration of your compressor
  • Temperature limits
  • Pressure rating
  • Application requirements

Stack Silencers


Stack silencers are essential in controlling noise produced in industrial stack exhaust. A number of stack silencer designs for new and retrofit stack installations are available. Every stack silencer is custom designed around the following parameters:

  • Acoustic targets
  • Flow requirements
  • Pressure drop
  • Temperature
  • Discharge velocity
  • Particulate loading
  • Structural integrity

Stack silencers can be supplied as stack inserts for quick installation, integrated into the base of stacks or attached to the top of stacks. They can be provided with or without casings, or in kit form for site assembly on very large diameter systems.

Optional materials of construction include alloy steels, FRP and CPVC with fabric, film and mesh baffle liners. Cleanable and removable liner/bullet designs are available for dirty applications, as well as high temperature designs.

Vent Silencers


The venting of high pressure gases results in very high noise levels. Vent silencers coupled with a pressure relief valve are applied in vent and blow down applications for pressurized steam, natural gas, carbon dioxide, as well as other gases, including pressurized air. Vent silencers are found in:

  • Boilers
  • Heat Recovery
  • Gas Compressor Stations
  • Chemical Processing

Industrial Mufflers


Reciprocating engines are widely used in applications ranging from power generation, gas transmission and storage, to marine and manufacturing processes.
Industrial mufflers may be reactive, reactive-absorptive or absorptive style dependent upon application. Application specific engine and operating conditions require the correct combination of muffler properties for the best results. Engine muffler design is based upon:

  • The type, size and end use of the engine
  • The degree of silencing required
  • Flow and temperature conditions
  • Application requirements

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