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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

    I understand that there are rolling diaphragms which are essentially stress free. However I would like to know if I could get away without using one. Essentially, I am asking about how to determine the flexural strength of an elastomer. Thank you for your reply.
  3. 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
  4. 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?
  5. ADNPD

    Globe versus Gate Valves

    Can anyone tell me why Globe valves seal more efficiently than Wedge Gate valves?
  6. 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...
  7. ADNPD

    Sealing Efficiency

    DLANDISSR, Thank you for your reply. It was very informative and helpful. If I wanted to use a gate valve are there any sealing elements which would be beneficial. Thank you. ADNPD
  8. ADNPD

    Sealing Efficiency

    Correction, I was actually wondering if a ball valve creates a better seal than a gate valve when the flowing element is a gas. Thanks
  9. 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
  10. ADNPD

    Motor/Pneumatic Valves

    The particular field in which I will be designing this 2" pneumatic valve is for the oil and gas field. It is an actuator. I am wondering about mechanical seals, wear of material, flow ports.
  11. 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
  12. ADNPD

    Flange Sizing charts

    Thanks for the reply, however I cannot obtain an electronic copy of the document, do you know of any websites that provide this information for free?
  13. 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
  14. 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
  15. 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
  16. ADNPD

    Pressure Rating

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

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