Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy gas or vapour functions, which offers noise discount in compressible fluid service for improved employee safety, with no impression on process circulate.
pressure gauge น้ำมัน is a full-bore gadget providing 15-decibel sound suppression to scale back noise inside pipes produced by sources upstream, corresponding to management valves or other gadgets. – Image: Emerson
The modal attenuator from Emerson is a full-bore gadget providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, corresponding to control valves or different devices. It is put in downstream of those units instead of a pipe spool piece, it generates no further stress drop, and has no influence on process circulate.
Until now, all options have generated vital strain drop, lowered circulate, and/or introduced obstructions. This has led some customers to install acoustic insulation to pipe sections to scale back noise, but this could 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 solution, improving worker security and regulatory compliance, while decreasing the risk of injury to downstream equipment due to high noise levels inside to piping.
Leading applications for the modal attenuator embrace those the place upstream course of flows are modified by control valves, stress reduction valves, pumps, compressors and different devices that generate noise. Many of those devices have to be put in in lengths of piping with no move restrictions downstream, and the modal attenuator works properly in these applications as a outcome 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 purposes the place particulates are suspended in course of flows, and/or the place pigging is required for cleansing and upkeep.
WhisperTube devices are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange scores of Class a hundred and fifty, 300 and 600. Pressure rankings match the flange score sizes, and the utmost temperature is 700°F (371° C).
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