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  1. neweng2008

    Needle valve sizing

    moltenmetal, thank you for all the information. very helpful.
  2. neweng2008

    Needle valve sizing

    Thanks for the info, moltenmetal. I have a DP type flow transmitter and I have checked with the manufacturer about the distance required to put the needle valve upstream of the FT. (around 20") As for the laminar/turbulent flow, I should check it out. I think the flow is turbulant where I am...
  3. neweng2008

    Needle valve sizing

    Thanks for your comment. Yes this model has a set screw that locks the valve on desired settings.
  4. neweng2008

    Needle valve sizing

    Hi all, I need to size a needle valve that is placed before a flow transmitter on the lube oil inlet line to a bearing. I know the amount of the flow thru this line (1.9 gpm) and also the model I need to choose from is Parker N series. The oil specific gravity is 0.85. my line size is 3/4"...
  5. neweng2008

    Electric motors and drives

    Bill, thanks for the info. This is a repeat job so I should use the VFD. Your comment regarding the start is interesting to me. Where could I find more info on starts and their differences with Drives. Thanks
  6. neweng2008

    Electric motors and drives

    Greetings, I am a mechanical engineer with limited knowledge of electrical equipment. I need to know what is a drive that should be used with the motor I am getting on a pump. I have never seen a drive! What does it do? Thanks.

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