Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy gas or vapour functions, which presents noise discount in compressible fluid service for improved worker safety, with no influence on course of flow.
pressure gauge is a full-bore system providing 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, similar to management valves or different gadgets. – Image: Emerson
The modal attenuator from Emerson is a full-bore system providing 15-decibel sound suppression to reduce back noise inside pipes produced by sources upstream, similar to management valves or different gadgets. It is installed downstream of those devices instead of a pipe spool piece, it generates no additional stress drop, and has no influence on course of flow.
Until now, all options have generated significant pressure drop, reduced flow, and/or introduced obstructions. diaphragm seal has led some users to put in acoustic insulation to pipe sections to cut back noise, but this can be costly and cumbersome to install, and it does nothing to scale back internal piping noise. The modal attenuator addresses these and other points with a drop-in solution, improving worker security and regulatory compliance, while lowering the chance of harm to downstream equipment as a outcome of excessive noise ranges inner to piping.
Leading purposes for the modal attenuator embody those the place upstream process flows are changed by control valves, pressure reduction valves, pumps, compressors and other devices that generate noise. Many of those units have to be installed in lengths of piping with no flow restrictions downstream, and the modal attenuator works properly in these purposes as a end result 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 functions where particulates are suspended in course of flows, and/or where pigging is required for cleaning and upkeep.
WhisperTube units are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange scores of Class 150, 300 and 600. Pressure scores match the flange score sizes, and the maximum temperature is 700°F (371° C).
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