Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy gas or vapour applications, which presents noise discount in compressible fluid service for improved worker security, with no impression on course of move.
The modal attenuator is a full-bore system providing 15-decibel sound suppression to reduce back noise inside pipes produced by sources upstream, similar to control valves or other gadgets. – 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, similar to control valves or different devices. It is put in downstream of these gadgets in place of a pipe spool piece, it generates no further pressure drop, and has no impression on course of move.
Until now, all options have generated vital stress drop, lowered move, and/or introduced obstructions. This has led some customers to install acoustic insulation to pipe sections to scale back noise, however this can be costly and cumbersome to install, and it does nothing to scale back inner piping noise. The modal attenuator addresses these and different points with a drop-in answer, bettering worker security and regulatory compliance, while lowering the chance of damage to downstream gear due to high noise levels internal to piping.
Leading functions for the modal attenuator include these the place upstream process flows are changed by control valves, pressure reduction valves, pumps, compressors and different units that generate noise. Many of these gadgets have to 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 can be utilized in purposes the place particulates are suspended in course of flows, and/or the place pigging is required for cleaning and maintenance.
WhisperTube gadgets are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange rankings of Class a hundred and fifty, 300 and 600. เกจวัดแรงอัดกระบอกสูบ match the flange rating sizes, and the maximum temperature is 700°F (371° C).