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  • Users: ywchua
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  1. ywchua

    FCC Power Recovery expander vibration

    Our FCC power recovery expander vibration levels climbed 2 mils in 2 days. We suspect catalyst deposits on the blades. It is a 2 stage expander. We're currently down on feed and the expander isolated for spalling through thermal cycling. My question, is thermal cycling the only way of removing...
  2. ywchua

    High pressure PD pump low emission seal?

    Hi all, We currently have a PD pump on our Hydrotreater pumping high concentration H2S (above 2000 ppm)water at 6 m3/h. It pumps from a suction of 3.7 kg/cm2 to 70 kg/cm2. Unfortunately we are only using single packing on this service, which I believe is specified wrongly during design. Any...
  3. ywchua

    H2S water pump, low flow, high discharge.

    Hi all, We currently have a PD pump on our Hydrotreater pumping high concentration H2S (above 2000 ppm)water at 6 m3/h. It pumps from a suction of 3.7 kg/cm2 to 70 kg/cm2. Unfortunately we are only using single packing on this service, which I believe is specified wrongly during design. Any...

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