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  1. acr2003

    Flow through flow control valve - how to read it?

    Thanks for all the replys guys, they were all very useful. Greg, you hit straight where I needed. I do not have a flowmeter right now, unfortunately, so I do really have to count on the formulas at this time. In any case, your explanation was exactly what I was looking for. One thing: my inlet...
  2. acr2003

    Flow through flow control valve - how to read it?

    Hello everybody, I have a flow control valve which has a Cv = 0.1 and controls the flow of staurated steam. Because this is not a flowmeter, I am trying to infer the flow passing through this valve according to the pressure drop across it. As I said, my fluid is 300F saturated steam and I am...
  3. acr2003

    Flow Control Valve - how to size it?

    Hi Guys, Thanks for the replies and for the help. Quark, I had a look on the link you gave me and answering jsummerfield , my fluid is steam. Anyway, with the information you provided me I was alreday able to figure out what would be the equation for steam and how to use it. Thanks a lot for...
  4. acr2003

    Flow in pounds/h versus cfm - simple question about units.

    Guys, Thanks so much for the replies. You were all very helpful and let me solve and understand this little quiz pretty fast and correctly. I am already calculating the flow according to the conditions I have using the charts you suggested me and the right units. Thanks a lot once again. - acr -
  5. acr2003

    Flow Control Valve - how to size it?

    Hi, I am trying to choose a flow control valve but I do not understand the meaning of "Cv" and what that stands for. Is this a characteristic of the valve? How do I read the flow range of a specific Cv valve. I am asking that because I need to choose a valve with a specific Cv but do not know...
  6. acr2003

    Flow in pounds/h versus cfm - simple question about units.

    This is a very basic question but it has been raising many doubts here, amazingly. How do I transform a flow of lbs/h of steam in cubic feet per minute (or if you prefer cubic meters per second). Could anyone please indicate me the formula and if that would be dependent on the temperature of the...
  7. acr2003

    Heat transfer between steam and nitrogen in a rig

    Hello, I have a fluidizing rig which uses steam as the fluidizing gas and nitrogen as a inert gas at the upper part of the same rig. The temperature of the steam is 600°C and the nitorgen is at 220°C. The steam flows upward at 180 liters/min and the nitrogen downward at 70 liters/min (they both...
  8. acr2003

    How to determine the flow in cfm or gm in a flow control valve?

    Thanks jdarco.
  9. acr2003

    How to determine the flow in cfm or gm in a flow control valve?

    Hello everybody, I have a low flow control valve with the following characteristics: Cv = 0.1 Range: 4-20 I am not a valve expert so I don't understand this terminology and I am trying to read the flow from this valve. I not even know what is the flow unit in this case (cubic feet/min...
  10. acr2003

    Water supply for steam line.

    Thanks abcmex and TBP for your fast an accurate response. The detailed explanation about the points where I could loose steam has enable me to calculate in a more accurate way the amount of water I would need for our system. I am checking all the "leaking spots" , how much the...
  11. acr2003

    Water supply for steam line.

    Hello, We are designing a steam line and some debate has been risen regarding the amount of water that will supply our steam demand. We know how much steam we need to run our application (liters/hour), according to a specific flow that we need inside the equipment tha uses it, but the question...
  12. acr2003

    Profilometer for test analysis

    Hello Everybody, I am about to start some testing on cylindrical samples (2cm diameter x 10cm length) that are subject to wear in a fluidized bed and I am looking for a profilometer for my mesurements of the wear rate on those samples. I have been looking around but it's been hard to find some...
  13. acr2003

    Looking for suitable Profilometer

    Hi mltappu, Thanks for your interest. I do really need a profilometer as I am acctually measuring the degree of wastage of my material. The information on the mass loss that is given me by the diference in the surface depth along my sample is of my interest - this is the reason for the...
  14. acr2003

    Looking for suitable Profilometer

    Hello Everybody, I am about to start some testing on cylindrical samples (2cm diameter x 10cm length) that are subject to wear in a fluidized bed and I am looking for a profilometer for my mesurements of the wear rate on those samples. I have been looking around but it's been hard to find some...
  15. acr2003

    SEM/EDS analysis in determining types of materials/coatings

    EDS usually is a general overview of whatt you get in a material and for what kind of elements you have, though some EDS don't have proper windows for elents such as C or O, for example. I suggest you to do some semi-quantitative X-ray diffraction analysis, which will tell you what kind of...
  16. acr2003

    Inconel 618-

    Hi sayeeprasadr, Inconel 718 (In718) can be used for both applications, due to the characteristics of supperalloys : they are light and very resistant to high temperature environments and to creep. Basically used as turbine blades, but can be used in other parts of turbine too. In the case of...
  17. acr2003

    Your interpretation of this EDS analysis

    Hi EngineerDave, I totally agree with Metalguy questions. If you could provide the answers it would be easier to analize. I have a question though. Is this powder material a subproduct of a process? I am asking that as it resembles a bit that you might have metal dusting, which is process that...
  18. acr2003

    Superheated steam at low pressures

    Hi DaveFitz, Your suggestions for the steam line were very welcome. I need to have pressurized steam leaving the boiler, or at least a diferential pressure at the boiler outlet, as I need a steam flow (for fluidizing a bed). I was checking some steam generators that could deliver pressure at...
  19. acr2003

    Superheated steam at low pressures

    DaveFitz, Thanks for your precise reply and tips on the valves, piping and fittings, etc. It cleared me a lot and definetly will help mea lot in designing my system. I am really intending to use an electric steam generator and superheater, due to my low flowrates. Just one point I didn't get...
  20. acr2003

    Superheated steam at low pressures

    Hi Linux, Thanks for your reply. You mean enthalpy (temperature plus heat capacity)? I know that if we treat superheated steam as an ideal gas (what can be done at that temperature), playing with the PVT equation, keeping V constant, theoritically you could do it. But, in practice I am not sure...

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