Fan Silencer

Circular silencers are silencers designed for circular ducts. We offer both circular inlet and circular discharge silencers; they're compatible with virtually all axial and centrifugal fans. We use a variety of different casing materials, including galvanized steel, stainless steel, and aluminum.

Rectangular silencers are silencers designed for rectangular ducts. Like our circular silencers, we offer rectangular inlet and discharge silencers that are compatible with axial and centrifugal fans. The casing options are the same as with our circular silencers; the only real difference is the shape.

Straight-through silencers or in-line silencers are designed to be installed in a straight section of ductwork; for this reason, they sometimes fall under the broader category of “duct silencer”. They're available in rectangular and circular form and often feature perforated metal linings along with sound-absorbing materials.

Reactive silencers are used in applications where airflow contains contaminants like dust, oil, or ash that would clog absorptive baffles, degrading their performance. Reactive silencers direct sound waves through chambers that partially reflect sound waves; these partially reflected waves meet new sound waves, interfering with them and canceling them out. They're particularly good at eliminating low-frequency noises.

Baffles are panels or segments of sound-absorbing material found within fan silencers; removable baffles are quite simply baffles that can be easily accessed and removed. These, too, are used for dirty airstreams, where cleaning the baffle may be important to avoid the degradation of its sound attenuating qualities.

Resonator silencers use cavities that are tuned to a specific frequency; when sound waves of that frequency enter, the resonator cavity vibrates in a way that cancels out those sound waves. They're used less frequently as fan silencers because fans generate broadband noise and they're tuned to eliminate specific frequencies. They can, however, be used as duct silencers in some contexts.