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Posts Tagged ‘resonant frequency’

Control Valve Noise-Induced Vibration Solution

Posted in Final Control Element on Monday, December 18th, 2017. No comments yet
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A presentation from this past October’s Emerson Exchange conference on control valve vibration problems was recently published by ControlGlobal.com. The article, Ethanol plant learns why pipe cracks, describes the problem-solving path to address this situation. Emerson’s Shawn Anderson and Adin Mann joined in an ethanol energy producer’s presentation to share the story of how the […]

Running Bump Test Helps Spot Machinery Resonance

Posted in Asset Optimization, Reliability on Wednesday, July 30th, 2014. 4 comments so far
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Operating rotating equipment at resonant frequencies can damage or destroy the equipment and create dangerous situations for nearby personnel. Understanding where these frequencies may exist is critical to safe and reliable operations. In this 4:51 YouTube video, Running Bump Test for Resonance Detection, Emerson’s Drew Mackley shows how tests can be performed while the rotating […]

New Thermowell Calculations Help Avoid Damaging Resonance

Posted in Measurement, Plant Equipment on Monday, February 21st, 2011. 5 comments so far
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Last week, I visited our Emerson division that makes the Rosemount brand family of instrumentation. One of the things I learned coming out of those meetings was a new release of thermowell design standards. For those not already familiar with a thermowell, it’s essentially a circular cylinder installed like a cantilever into process piping. The […]

Abating Acoustical Noise in Piping

Posted in Final Control Element, Plant Equipment on Tuesday, February 2nd, 2010. No comments yet
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Last week, I shared how resonance can contribute to excessive machine vibration in the post, Spotting and Fixing Resonance in Plant Equipment. A colleague pointed me toward another true Emerson Expert, Dr. Allen Fagerlund. Al’s expertise is on noise measurement and prediction. He also serves on the ISA75, Control Valve Standards and its subcommittee, ISA75.07, […]

Spotting and Fixing Resonance in Plant Equipment

Posted in Asset Optimization, Plant Equipment on Friday, January 29th, 2010. No comments yet
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Alain Pellegrino, a predictive maintenance technician with Emerson’s local business partner Laurentide Controls, has a great article in ReliablePlant.com on resonance in plant equipment. The article, How to identify, correct a resonance condition, describes how resonance is a common cause in excessive machine vibration. Resonant frequencies are something most all engineers face whether it is […]