Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy gas or vapour applications, which presents noise discount in compressible fluid service for improved employee security, with no impact on course of move.
The modal attenuator is a full-bore device offering 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to control valves or other units. – Image: Emerson
The modal attenuator from Emerson is a full-bore system providing 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, such as management valves or different gadgets. It is installed downstream of those gadgets instead of a pipe spool piece, it generates no extra pressure drop, and has no impact on course of move.
Until now, all solutions have generated vital stress drop, reduced move, and/or introduced obstructions. This has led some customers to install acoustic insulation to pipe sections to scale back noise, but this can be expensive and cumbersome to put in, and it does nothing to reduce inside piping noise. The modal attenuator addresses these and different points with a drop-in resolution, bettering worker safety and regulatory compliance, whereas decreasing the chance of damage to downstream tools as a end result of excessive noise ranges inner to piping.
Leading เพรสเชอร์เกจ for the modal attenuator embody those where upstream course of flows are modified by control valves, stress relief valves, pumps, compressors and different devices that generate noise. Many of those devices should be put in in lengths of piping with no flow restrictions downstream, and the modal attenuator works nicely in these applications as a outcome of it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it can be utilized in purposes the place particulates are suspended in process flows, and/or where pigging is required for cleaning and upkeep.
WhisperTube devices are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange scores of Class a hundred and fifty, 300 and 600. Pressure scores match the flange ranking sizes, and the utmost temperature is 700°F (371° C).
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