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  • Users: pardal
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  1. pardal

    Circular/Spiral concrete stairs.

    Sorry to tell al you I lost such file due a virus attack Pardal
  2. pardal

    Vendor ID and S/N

    Maybe you can use a codebar generator Pardal
  3. pardal

    INVOLUTE SPLINE HUB

    Hi Vaslava , I did not machine any one hub , I was only looking for a way to draw it to make a device. Tolerance was not a problem for my task. I cut it by laser. Pardal
  4. pardal

    equivalent coil from ss to cooper

    Art and Clyde: Thanks a lot for your invaluable help. Please feel free to send me any sketch or drawing to my e-mail. devitg@ciudad.com.ar They will be wellcome. With the best regards. Gabriel(aka)Pardal Pardal
  5. pardal

    equivalent coil from ss to cooper

    Hola Art , gracias por tus concejos. Could you giveme some fatcts about what do you didi in such circunstance , at Perú, just the initial kick . Maybe the best diameter or if parallel coils are better to use. As comparing with standard air conditioning system you can see , 3/8 finned pipe , and...
  6. pardal

    Electrical Abbreviation on P&ID, need help!!

    As I'm spanish spoken , could you send me a copy of such drawing to devitg@ciudad.com.ar Maybe I can uncrypt it. Pardal
  7. pardal

    equivalent coil from ss to cooper

    Quark, Art and Clyde: Thanks for you answer . Forget about the "damaged ss coil" One self is slave of his words , and king of his silence. I shall admit my guilt action. Some time ago I read a post asking about the proper length of a coil to be used as a direct expansion in the same condition...
  8. pardal

    equivalent coil from ss to cooper

    Hi Montemayor: All my prior facts was , as I think, the fast way to calc by comparation.So as I had a chiller with the up specification , I was trying to copy it. As I can see you can help me with the end task to do . I need to calculate the such heat exchanger to the following data. Chilled...
  9. pardal

    equivalent coil from ss to cooper

    Hi Quark. It will be a change to the same fluid , tap water The ss coil it's damaged so I need to replace it with a cooper coil.I can not made a ss coil. I will add some antifreeze and a cooper corrosion inhibitor. The chiller is set now to 12 °C water leaving temperature. I understand about...
  10. pardal

    equivalent coil from ss to cooper

    How it can be calculated the equivalent lenght of a coil used on a chiller. This are the facts. Chiller capacity 35000 BTU or 10Kw at 20 °C The evaporator is a stainless tube coil tube diam 19.05 mm 3/4" 1.25 mm thick Tube lenght 18.5 m 60 ' I intend to change it to cooper tube 12 mm...
  11. pardal

    Extrude along 3D Polyline

    See here http://www.eng-tips.com/viewthread.cfm?qid=101312 Pardal
  12. pardal

    Extrude along 3D Polyline

    Hi Stewi. All extrude figure will twist on the 3d spiral. IT is a ACAD limitation, as far I know Pardal
  13. pardal

    Salt Spray Cabinet

    Please advise where to see the fundamentals and schematic drawing of a Salt Spray Cabinet , as used to test coatings. Pardal
  14. pardal

    How to use lisp to automate assembly?

    Sorry , it is a Mechanical desktop , I do not know about it . Pardal
  15. pardal

    How to use lisp to automate assembly?

    Hi popsin , are your's 3dparts???? Could you send me some example? If so, do to devitg@ciudad.com.ar Seem to be a hard to do task , maybe INVENTOR could do it. Pardal
  16. pardal

    low pressure gas flow

    MortenA: Yes , we only use steel pipe , new , so the friction factor could be asumed , and the temperature is the normal on a house or building. Pardal
  17. pardal

    low pressure gas flow

    PARIS and MADRID in 1972 , it is 1872 Pardal
  18. pardal

    low pressure gas flow

    TD2K. Maybe the 25362's paper is not at his personal library , but I have a Phisic Book whose author is A GANOT published in PARIS and MADRID in 1972 , with pictures, not photo ,of the aparatus presented at the 1867 UNIVERSAL EXPOSITION OR TRADE OF PARIS . If I'm not wrong this was when the...
  19. pardal

    low pressure gas flow

    Here in my country the gas piping for low pressure is handled by the POOLE formula , for natural gas up to 200 mm water column. The formula is as follow D= ( F^2 * 2 * S* L / H )^1/5 where D= DIAMETER [CM] F= FLOW [M3/HOUR] S= SPECIFIC WEIGHT [0.65 FOR NATURAL GAS] L= LENGTH [M] H= ALLOWED...
  20. pardal

    drainage trench slope inside a building

    maybe you can make a "powered trench" , just add some water flow at the start point , so to dilute the slurry. Pardal

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