Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy gasoline or vapour applications, which offers noise reduction in compressible fluid service for improved worker security, with no impression on course of circulate.
The modal attenuator is a full-bore gadget providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, similar to control valves or different devices. – 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 devices rather than a pipe spool piece, it generates no extra pressure drop, and has no impression on process circulate.
Until now, all options have generated vital strain drop, reduced move, and/or launched obstructions. This has led some users to install acoustic insulation to pipe sections to scale back noise, but this can be expensive and cumbersome to put in, and it does nothing to cut back internal piping noise. เกจวัดแก๊สหุงต้ม addresses these and different issues with a drop-in answer, enhancing employee safety and regulatory compliance, whereas reducing the risk of injury to downstream gear because of high noise levels inside to piping.
Leading purposes for the modal attenuator embrace these the place upstream course of flows are changed by management valves, pressure aid valves, pumps, compressors and different devices that generate noise. Many of these units should be installed in lengths of piping with no circulate restrictions downstream, and the modal attenuator works properly in these purposes as a result of it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it might be used in applications where particulates are suspended in process flows, and/or the place 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 ratings of Class 150, 300 and 600. Pressure scores match the flange score sizes, and the utmost temperature is 700°F (371° C).
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