ขนาดpressuregauge has introduced the Fisher WhisperTube Modal Attenuator for noisy gas or vapour functions, which presents noise discount in compressible fluid service for improved worker security, with no impression on process circulate.
The modal attenuator is a full-bore system 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 gadget providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, corresponding to control valves or different gadgets. It is installed downstream of those units rather than a pipe spool piece, it generates no extra strain drop, and has no impact on process circulate.
Until now, all solutions have generated vital stress drop, lowered circulate, and/or launched obstructions. This has led some users to put in acoustic insulation to pipe sections to reduce back noise, however this might be expensive and cumbersome to put in, and it does nothing to scale back inside piping noise. The modal attenuator addresses these and other points with a drop-in solution, bettering employee security and regulatory compliance, while reducing the chance of injury to downstream equipment as a end result of high noise levels internal to piping.
Leading purposes for the modal attenuator embrace those the place upstream process flows are changed by management valves, strain reduction valves, pumps, compressors and other devices that generate noise. Many of these units have to be installed in lengths of piping with no move restrictions downstream, and the modal attenuator works well in these purposes as a outcome of it introduces no such restrictions.
In addition, the modal attenuator doesn’t introduce an obstruction into the piping, so it might be utilized in purposes where particulates are suspended in course of 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 rankings of Class one hundred fifty, 300 and 600. Pressure ratings match the flange rating sizes, and the maximum temperature is 700°F (371° C).