Emerson introduces silencer to protect staff

Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy fuel or vapour functions, which provides noise reduction in compressible fluid service for improved employee safety, with no impact on course of move.
The modal attenuator is a full-bore system providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, similar to management valves or other units. – Image: Emerson
The modal attenuator from Emerson is a full-bore gadget offering 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to control valves or other gadgets. It is installed downstream of these units rather than a pipe spool piece, it generates no extra stress drop, and has no influence on process flow.
Until now, all options have generated significant strain drop, lowered flow, and/or introduced obstructions. This has led some customers to install acoustic insulation to pipe sections to reduce back noise, but this may be costly and cumbersome to put in, and it does nothing to reduce internal piping noise. Endorsed addresses these and other points with a drop-in answer, improving employee security and regulatory compliance, while reducing the chance of damage to downstream equipment as a result of excessive noise levels inner to piping.
Leading functions for the modal attenuator embrace these where upstream course of flows are modified by control valves, stress reduction valves, pumps, compressors and other gadgets that generate noise. Many of these gadgets should be put in in lengths of piping with no circulate restrictions downstream, and the modal attenuator works properly in these functions because it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it could be utilized in functions the place particulates are suspended in process flows, and/or the place pigging is required for cleaning and maintenance.
WhisperTube gadgets are supplied in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange rankings of Class 150, 300 and 600. Pressure rankings match the flange ranking sizes, and the maximum temperature is 700°F (371° C).

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