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  1. apf

    Design standards

    What are the design stardards for class 900 butterfly valves?
  2. apf

    Calculating flow resistance coefficient for butterfly valve

    How can I Calculate the flow resistance coefficient (?) for butterfly valve?
  3. apf

    Cold box applications

    Specification for valves for cryogenic service BS 6364:1984 4.5 For applications other than cold box applications the minimum gland extension length shall be 250mm. What are cold box applications?
  4. apf

    Rating for special materials?

    Both ASME B16.34 and B16.5 provide an appendix that allows the calculation of a pressure temperature rating. ASME B16.34:2004 Appendix B
  5. apf

    Nickel Aluminium Bronze and Inconel

    We normally would be using Monel 400 but have no stock. We need to find a replacement material fast and have 625 in stock.
  6. apf

    Nickel Aluminium Bronze and Inconel

    They would be coupled together to form a valve body and seal and would be in contact with seawater.
  7. apf

    Nickel Aluminium Bronze and Inconel

    Would there be any reasons not to use nickel aluminium bronze and inconel in the same environment.
  8. apf

    Nickel-aluminium Bronze Pressure Temperature Rating

    How do valve manufactures provide an ambient or cold working pressure of 20bar (Class 150) for Nickel-aluminium Bronze B148 C95800? In basic terms the standards ASME B16.24:2001 (US) and EN 1092-3 / 1759-3:2003 (Euro) do not take into account the higher mechanical properties of Nickel-aluminium...
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