Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy gasoline or vapour functions, which offers noise discount in compressible fluid service for improved worker security, with no impression on process move.
The modal attenuator is a full-bore system providing 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to management valves or other devices. – Image: Emerson
The modal attenuator from Emerson is a full-bore gadget providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, corresponding to management valves or other devices. It is installed downstream of these units rather than a pipe spool piece, it generates no additional strain drop, and has no impact on process circulate.
Until now, all options have generated important stress drop, reduced circulate, and/or launched obstructions. This has led some users to put in acoustic insulation to pipe sections to reduce noise, however this can be pricey and cumbersome to put in, and it does nothing to minimize back internal piping noise. The modal attenuator addresses these and other points with a drop-in answer, improving employee safety and regulatory compliance, whereas decreasing the danger of damage to downstream gear as a outcome of high noise ranges inner to piping.
Leading applications for the modal attenuator include these the place upstream course of flows are modified by management valves, stress reduction valves, pumps, compressors and other devices that generate noise. Many of these devices should be installed in lengths of piping with no circulate restrictions downstream, and the modal attenuator works well in these functions as a outcome of it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it might be utilized in applications the place particulates are suspended in process flows, and/or the place pigging is required for cleansing and maintenance.
Running out are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange rankings of Class 150, 300 and 600. Pressure scores match the flange ranking sizes, and the maximum temperature is 700°F (371° C).
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