Emerson has introduced the Fisher WhisperTube Modal Attenuator for noisy fuel or vapour applications, which presents noise reduction in compressible fluid service for improved worker security, with no impression on course of flow.
The modal attenuator is a full-bore device providing 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, similar to control valves or different devices. – Image: Emerson
The modal attenuator from Emerson is a full-bore system offering 15-decibel sound suppression to reduce noise inside pipes produced by sources upstream, such as control valves or different devices. It is put in downstream of those gadgets instead of a pipe spool piece, it generates no additional strain drop, and has no impact on course of move.
Until now, all options have generated significant stress drop, reduced circulate, and/or introduced obstructions. This has led some customers to put in acoustic insulation to pipe sections to scale back noise, however this can be expensive and cumbersome to install, and it does nothing to reduce back inner piping noise. The modal attenuator addresses these and other points with a drop-in solution, improving worker security and regulatory compliance, while decreasing the chance of damage to downstream equipment because of excessive noise levels inside to piping.
Leading purposes for the modal attenuator embrace those where upstream course of flows are modified by control valves, strain aid valves, pumps, compressors and different devices that generate noise. Many of these gadgets should be put in in lengths of piping with no circulate restrictions downstream, and the modal attenuator works properly in these applications as a result of it introduces no such restrictions.
In addition, the modal attenuator does not introduce an obstruction into the piping, so it may be used in applications where particulates are suspended in course of flows, and/or where pigging is required for cleaning and upkeep.
pressure gauge ไฮ ด รอ ลิ ค are provided in sizes from 2–12 in, with American Society of Mechanical Engineer (ASME) flange ratings of Class 150, 300 and 600. Pressure ratings match the flange score sizes, and the maximum temperature is 700°F (371° C).
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