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  • Users: teowl
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  1. teowl

    Piping Resonance

    Hi Zimann, Looks like we there are a lot of similarities to our problems. Your information gave me more confidence to what the vendor proposed. Like you say...may not be perfect, but it will be good enough to achieve significant improvement. Thanks
  2. teowl

    Piping Resonance

    Hi Zimann, Just about right time to see your reply. I have spoken to the vendor, they too suggest some of the modifications done on your pumps, such as changing the vane angle to soften the pulsation. And also staggered the vanes so it become 8 vanes to produce pulsation of higher freq but much...
  3. teowl

    Piping Resonance

    Dear all, Thank you for all your valuable input. Zimann, I think my problem was there since day 1, but that was many years ago before I was here. Recently, the issue seemed to deteriorate. So what was the final solution the vendor gave to you? Did you manage to find if it was the piping...
  4. teowl

    Piping Resonance

    Hi all, I have a long standing vibration problem which I hope to share and hopefully can get some good feedbacks on how I can resolve the issue. We have a centrifugal pump system. During operation, the pipings are vibrating very badly, as much as 0.8 in/s. FFT Spectrum showed a clean 4 x rpm...

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