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  • Users: smCHe
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  1. smCHe

    Increasing Pump Speed

    Hi All, Let me share more data on the VSD, the options are 1. increase one pump speed and take all the risk ! the vendor simply will not give much info on why the speed increase is risky, just stating the pump is not designed for that. This option is not wise but I have to share it with our...
  2. smCHe

    Increasing Pump Speed

    just to update you guys, tried running the two pumps in parallel and things went smooth, now I need to check on on VSD motor to see the feasibility of that option! cheers,
  3. smCHe

    Vapor-locking on Propane reflux pumps (question).

    raise the level in the pump suction level, up to the max you can sustain. this is if you did not try it already raise the cooling of the reflux condenser, this gives more margin for the pump as well then do the other checks on NPSH
  4. smCHe

    Increasing Pump Speed

    hi ElSid1, the pumps are both in propylene service, I just need to increase the flow in the same system. today i talked to operations, will try running both pumps and check actual operation. regards, sayed
  5. smCHe

    Increasing Pump Speed

    Hi Pumpsonly, yes, this is option-1, running the pump and spare in parallel. have not tried it but according to my analysis it should do. the suction speed at the pump inlet is a tad high at 7.5 f/sec thu Running higher pump speed by installing a VSD ( ~ 200 hp) means I have a full pump spare...
  6. smCHe

    Shell and Tube Heat Exchanger

    most of the horizontal condensers I know don't have baffles, they have support plates as 25362 says to drain liquid, some are also slopped if E type. I would go with J type as its simpler to operate
  7. smCHe

    Increasing Pump Speed

    Hi All, I'm currently checking the possibility of increasing the plant capacity because we managed to secure additional feed. The circulation pump (from KSB RPH 150-630) for propylene seems to be the main limitation. I checked the pump and the installed impeller is almost the casing max. so not...

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