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  • Users: ADNPD
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  1. ADNPD

    Inflow Performance Relationship

    Hi Everybody, I was wondering if anyone knows the Inflow Performance Relationship (IPR) equation? I would really appreciate your help. Thanks, ADNPD
  2. ADNPD

    elastomer diaphragms

    Hello, I am designing a piston cylinder with a moblie elastomer (nylon with neoprene coating) diaphragm seal that moves with the piston. How do I go about determining the travel of the diaphragm before failure of the elastomer? Your help would be greatly appreciated. ADNPD
  3. ADNPD

    Thick vs. Thin walled pressure vessel

    Could someone please explain the criteria for what constitutes as a thick walled and thin walled pressure vessel. Also, is the hoop stress and longitudinal stress formulas valid for both?
  4. ADNPD

    Globe versus Gate Valves

    Can anyone tell me why Globe valves seal more efficiently than Wedge Gate valves?
  5. ADNPD

    Sealability against natural gas

    Dear All, I was presented with a question concerning valve sealability against natural gas. The question was, in a high pressure full port complete flow channel would a wedge gate valve be able to provide a good enough seal? I thought that if an elasomeric sealing element were placed into...
  6. ADNPD

    Sealing Efficiency

    Hello, I was wondering if a globe valve creates a better seal than a gate valve when the flowing element is a gas? Also, are rounded seals better than flat faced seals? ADNPD
  7. ADNPD

    Motor/Pneumatic Valves

    Dear Expert, I am trying to design a motor/pneumatic valve from scratch. I was wondering if there are any helpful resources online or books that would be of any use in this area. Your suggestions would be greatly appreciated. Thanks. ADNPD
  8. ADNPD

    Flange Sizing Charts

    Dear Expert, I am looking for some internet resources which would provide information on the dimensions of various ANSI Flanges. I am particularly interested in Orifice flange unions with flange taps. Thank you in advanced for your help. ADNPD
  9. ADNPD

    Flange Classes Sizing Charts

    Hello, I am trying to find a dimension chart for various classes of ANSI flange plates with flange taps. Does anyone know of any websites that have such information. Thanks in advance for your help. ADNPD
  10. ADNPD

    Flange Sizing charts

    I am trying to find a sizing or dimension chart for various classes of flanged plates (ie. 600, 900, 1500) with flange taps. If anyone knows of a website I would greatly appreciate it. Thanks in advanced. ADNPD
  11. ADNPD

    Pressure Rating

    I am wondering how to calculate the Pressure Rating for a hammer union.

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