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Recent content by Pucp

  1. Pucp

    Standard deviation calculation

    Thanks a lot guys. I will follow btrueblood advice. Regards Ian
  2. Pucp

    Standard deviation calculation

    Dear Denial Thanks for the reply. I am dealing with L2 vs. time because I am trying to show if my data follows the solution of the differential equation for diffusion (R2 = constant * time). You can use L vs. squared root of time as an option to show the same but I think that is when you...
  3. Pucp

    Standard deviation calculation

    Hi I have measured a dimension of particles (L) as a function of time. I measured several particles for each time. Then I got for each time a mean value and a standard deviation. No problem with that. Then I plot my data (mean value of L and time) in the form: L2 - Lo2 (L-squared minus...
  4. Pucp

    How to make the average of two Excel graphs?

    Hi, I have TWO different tensile test data (x=elongation, y=stress) from the same material. I want to AVERAGE them and generate just one curve but the main problem for me is that the tensile machine took data at DIFFERENT X (elongation) values in the two tests. So for example in one test I...
  5. Pucp

    Vitra-Glass bowls in Vertical Turbine Pumps

    Hi, I have read about intermediate bowls in vertical turbine pumps that have vitra-glass lined waterways for maximum efficiency and wear protection. But I will like to know if this is a common process or if it is only applied by ITT pump companies (Goulds pumps, Bell&Gosset pumps, etc.). Also if...
  6. Pucp

    LEROID G24 compressor

    Hi, I need to find technical information (power, rpm, etc) of a LEROID G24 Compressor, I can´t find their web page and any web page related to this product. It could be a spelling problem. I will appreciate your help. Thanks in advance. Ian
  7. Pucp

    Plug Gage and Taper Gage for NPT

    Hi,our Quality Assurance Department has to control several components having 1/8"NPT thread, I have heard that we have to use a plug gage and also a taper gage to ensure we get a proper seal to the threads. Can anyone explain me the difference between those types of gage?, what measures...
  8. Pucp

    Centrifugal Screw Pump - any opinions?

    CB2 you are right about Hidrostal history. Wickedpete, to be honest I work at Hidrostal - Peru . First you have not written what is the operation point, please be specific about all the pumping liquid characteristic. Now let me give some important characteristic about our pumps. Hidrostal´s...
  9. Pucp

    Rewinding from three phase to single phase

    Steve. The case of the electric motor is done in our foundry, is not the kind of pump that need submersible motor. We request the motor 2HP 2 poles 3 phase electric motor and assembly it into the case of the pump in our factory. This is kind of a R&D test, so want to evaluated not only the cost...
  10. Pucp

    Rewinding from three phase to single phase

    Hi, I have to test a submersible pump (1.6 - 2 Kw and 1.1Kw two pump models)that uses as a standard a 2HP 2 poles three phase electric motor 60 Hz (with all the factors is enough to the power required by the pump) . But now we want to assembly the same 2HP 2 poles 60 Hz but rewinded to single...
  11. Pucp

    Parallel Pump Selection / Doubts with head losses

    Hi, thank you for your replies. PS, this system does not exist, so I do not have any data to measure. MortenA, what you are doing is different from my reasoning, you said that for each pump the head losses are the sum of the losses in each part of the pipe, it does not depend on the flow rate of...
  12. Pucp

    Parallel Pump Selection / Doubts with head losses

    Hi, I have the following problem. We have to select pumps for a big pumping station. We have to deliver 6000 l/s, and we want to use 10 pumps (vertical turbine pumps) in parallel operation (600 l/s each one). I can calculate each pump in its line (with butterfly valves, check valves ) but then...
  13. Pucp

    Flow measurements

    Hi, does anyone know the best flow measurement device for water without using turbine or ultrasonic ones. We need this device for 600 l/s, 1500 l/s, 750 l/s, 150 l/s. The water came from a river. The main problem is that we want to use one that allow us the minor distance required (for less...
  14. Pucp

    Pumping station design

    Hi, I am working in an irrigation project, and we have to design the pumping station (10 vertical turbine pumps and 1 in stdby. There are channels for water transportation from the river and we want to use the Hidraulic Institute Standards configuration for the sump with the same calculate...
  15. Pucp

    Pipe dimensions and tips

    Hi, I have to deal right now with pipe diameters larger than 42" for an agricultural project ( I do not know what is the largest comercial diameter), but I have no information about comercial sizes, schedules or types of pipes. I will prefer to use steel pipes. So I will appreciate if...
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