Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy fuel or vapour applications, which offers noise reduction in compressible fluid service for improved employee security, with no impact on course of flow.
The modal attenuator is a full-bore gadget offering 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, such as control valves or different devices. – Image: Emerson
The modal attenuator from Emerson is a full-bore device offering 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, corresponding to management valves or different units. It is installed downstream of these units in place of a pipe spool piece, it generates no extra pressure drop, and has no impact on course of flow.
Until now, all solutions have generated significant stress drop, lowered flow, and/or introduced obstructions. This has led some customers to install acoustic insulation to pipe sections to cut back noise, however this could be costly and cumbersome to install, and it does nothing to minimize back inner piping noise. The modal attenuator addresses these and other issues with a drop-in answer, bettering worker security and regulatory compliance, while reducing the danger of harm to downstream tools because of excessive noise ranges inner to piping.
Leading While they last for the modal attenuator embrace those the place upstream process flows are changed by control valves, stress relief valves, pumps, compressors and other units that generate noise. Many of these gadgets must be installed in lengths of piping with no move restrictions downstream, and the modal attenuator works well in these purposes because it introduces no such restrictions.
In addition, the modal attenuator does not introduce an obstruction into the piping, so it can be used in applications the place particulates are suspended in course of flows, and/or the place pigging is required for cleaning and maintenance.
WhisperTube devices are offered in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange rankings of Class one hundred fifty, 300 and 600. Pressure rankings match the flange rating sizes, and the maximum temperature is 700°F (371° C).
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