The modal attenuator consists of a series of carefully engineered resonant cavities to provide sound reduction across a wide spectrum of frequencies. The full-bore design allows unrestricted flow, and internal drain channels drain off condensate which could build up in the device and reduce performance. Installed just downstream of the valve, the modal attenuator achieves an overall sound reduction up to 15 dBa, while creating no restriction in flow capacity whatsoever. The device can be used on existing valves or paired with a low noise control valve to achieve even higher levels of noise reduction. Unlike diffusers or silencers, the modal attenuator works consistently across a wide range of flow rates.
Posts by or with Mike Hoyme
At the Emerson Exchange Americas virtual series, Emerson’s Mike Hoyme and Stanley Af demonstrated diagnostics in the final elements within a safety instrumented function.
Safety—both personnel and process safety—are always top concerns for manufacturers and producers. At the Emerson Exchange Americas Virtual Series, Emerson’s Ed Schodowski, Meha Jha, Mike Hoyme and Marcelo Dultra shared a panel to discuss innovations in personnel and process safety for refiners and chemical producers.
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