Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy gasoline or vapour purposes, which presents noise discount in compressible fluid service for improved employee safety, with no influence on course of flow.
The modal attenuator is a full-bore system providing 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to control valves or different units. – Image: Emerson
The modal attenuator from Emerson is a full-bore system offering 15-decibel sound suppression to reduce back noise inside pipes produced by sources upstream, similar to control valves or different gadgets. It is installed downstream of those units instead of a pipe spool piece, it generates no additional strain drop, and has no impact on process circulate.
Until now, all options have generated significant stress drop, decreased flow, and/or launched obstructions. This has led some users to install acoustic insulation to pipe sections to reduce noise, however this may be pricey and cumbersome to put in, and it does nothing to scale back inner piping noise. The modal attenuator addresses these and different points with a drop-in resolution, enhancing worker safety and regulatory compliance, whereas lowering the danger of damage to downstream gear due to excessive noise ranges inside to piping.
Leading Complete for the modal attenuator include these the place upstream course of flows are changed by management valves, stress aid valves, pumps, compressors and other units that generate noise. Many of these gadgets must be installed in lengths of piping with no move restrictions downstream, and the modal attenuator works nicely in these purposes because it introduces no such restrictions.
In addition, the modal attenuator does not introduce an obstruction into the piping, so it could be used in purposes where particulates are suspended in process flows, and/or where pigging is required for cleansing and maintenance.
WhisperTube units are offered 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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