Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy gas or vapour purposes, which provides noise discount in compressible fluid service for improved employee security, with no influence on process circulate.
The modal attenuator is a full-bore gadget offering 15-decibel sound suppression to minimize 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 device offering 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, similar to control valves or other units. It is installed downstream of these units rather than a pipe spool piece, it generates no extra pressure drop, and has no impression on course of circulate.
Until now, all options have generated important stress drop, reduced flow, and/or introduced obstructions. This has led some users to put in acoustic insulation to pipe sections to scale back noise, but this may be costly and cumbersome to put in, and it does nothing to cut back inner piping noise. The modal attenuator addresses these and different issues with a drop-in resolution, improving worker security and regulatory compliance, whereas decreasing the chance of injury to downstream tools due to high noise levels inside to piping.
Leading applications for the modal attenuator embody those where upstream process flows are changed by control valves, strain reduction valves, pumps, compressors and other gadgets that generate noise. Many of those devices have to be put in in lengths of piping with no flow restrictions downstream, and the modal attenuator works well in these purposes as a end result of it introduces no such restrictions.
In addition, the modal attenuator does not introduce an obstruction into the piping, so it can be utilized in purposes where particulates are suspended in process flows, and/or the place pigging is required for cleaning and maintenance.
WhisperTube units are offered in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange ratings of Class 150, 300 and 600. เครื่องมือใช้วัดความดัน match the flange score sizes, and the utmost temperature is 700°F (371° C).
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