Emerson introduces silencer to guard staff

Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy fuel or vapour applications, which offers noise reduction in compressible fluid service for improved worker safety, with no influence on process circulate.
Invitation only is a full-bore system offering 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to control valves or other gadgets. – 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, similar to control valves or different devices. It is put in downstream of these gadgets in place of a pipe spool piece, it generates no extra pressure drop, and has no influence on process circulate.
Until now, all options have generated important pressure drop, lowered flow, and/or introduced obstructions. This has led some users to put in acoustic insulation to pipe sections to reduce noise, however this may be pricey and cumbersome to put in, and it does nothing to minimize back inside piping noise. The modal attenuator addresses these and other issues with a drop-in answer, bettering worker safety and regulatory compliance, while decreasing the chance of damage to downstream gear because of excessive noise levels internal to piping.
Leading purposes for the modal attenuator embrace these where upstream course of flows are changed by control valves, pressure relief valves, pumps, compressors and other units that generate noise. Many of these units have to be installed in lengths of piping with no flow restrictions downstream, and the modal attenuator works well in these purposes because it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it can be utilized in functions where particulates are suspended in course of flows, and/or where pigging is required for cleansing and upkeep.
WhisperTube units are supplied in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange ratings of Class a hundred and fifty, 300 and 600. Pressure rankings match the flange ranking sizes, and the maximum temperature is 700°F (371° C).
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