บทความ เกจวัดแรงดัน

Emerson has launched the Fisher WhisperTube Modal Attenuator for noisy gasoline or vapour purposes, which offers noise reduction in compressible fluid service for improved worker security, with no impression on process circulate.
เกจวัดแรงดันสูญญากาศ is a full-bore device offering 15-decibel sound suppression to reduce back noise inside pipes produced by sources upstream, similar to control valves or different units. – Image: Emerson
The modal attenuator from Emerson is a full-bore system providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, similar to control valves or different units. It is installed downstream of these units instead of a pipe spool piece, it generates no extra pressure drop, and has no impact on process circulate.
Until now, all options have generated important strain drop, lowered move, and/or introduced obstructions. This has led some users to install acoustic insulation to pipe sections to reduce noise, but this could be expensive and cumbersome to put in, and it does nothing to scale back internal piping noise. The modal attenuator addresses these and different points with a drop-in solution, bettering worker safety and regulatory compliance, whereas reducing the chance of damage to downstream tools because of excessive noise levels inner to piping.
Leading เกจแรงดัน for the modal attenuator embody these where upstream course of flows are changed by management valves, strain reduction valves, pumps, compressors and other gadgets that generate noise. Many of those gadgets should be installed 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 might be utilized in purposes where particulates are suspended in process flows, and/or where 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 rankings of Class 150, 300 and 600. Pressure ratings match the flange ranking sizes, and the utmost temperature is 700°F (371° C).
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