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  • Users: S4in
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  1. S4in

    PRV vs Orifice for fluctuating flow

    Thank you for your answers! The PRV was of the cheap type, spring regulated with no active PID control. I agree with you I2I, the spring was not able to respond quickly enough to the pulses, and therefore making the problem worse instead of helping to resolve it. Br, Sai
  2. S4in

    PRV vs Orifice for fluctuating flow

    Hello all! I have a fuel return pipe from a diesel engine that naturally have a fluctuating flow. Pressure pulses in the system was noted to be reduced when the PRV was replaced by an fixed restriction (orifice) but unfortunately it is a bit difficult to explain why. Anybody have any good ideas...
  3. S4in

    Vibrations due to pressure drop over orifice

    Ah, just what I needed :) Gonna check it out now! Br, Sai
  4. S4in

    Flashing Unit

    While I´m at it, I (might) need to design a flashing unit with a capability of removing 1-10% light fractions from crude oil, with a capacity of ~5m3/h Any recommendations or good advice on this?? Br, Sai
  5. S4in

    Oil standards for destillation

    Hello! I am trying to track down the ASTM D 285 standard. Since I am not willing to pay 43$ for an old discontinued standard I would be very happy if any of you could help me with it?
  6. S4in

    Vibrations due to pressure drop over orifice

    Thank you! Do you have any good orifice programs to recommend Roy? Br, Sai
  7. S4in

    Flow induced vibration

    Thank you all for your answers! I need to get some more data before I can come back to you, but now I have some guidlines! Many thanks to you all!! Best regards, Sai
  8. S4in

    Flow induced vibration

    heh, Thank you MJCronin. and yes, this problem was discovered after startup.. now i need to explain why. it´d be nice to have some calculative figures to back it up with, not just saying: "It´s there" Thank you also for the excellent literature recommendations, but I would also like some...
  9. S4in

    Flow induced vibration

    Hello everybody! Do any of you have any tips on how to calculate vibrations caused by pressuredrop over an orifice? It now seems that higher backpressure leads to heavier vibrations. The flow is also fluctuating, reprociating pump. Any tips on litterature would also be welcome! Cheers, Sai
  10. S4in

    Vibrations due to pressure drop over orifice

    Hello everybody! Do any of you have any tips on how to calculate vibrations caused by pressuredrop over an orifice? It now seems that higher backpressure leads to heavier vibrations. The flow is also fluctuating, reprociating pump. Any tips on litterature would also be welcome! Cheers, Sai

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