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Recent content by LTZ

  1. LTZ

    Gate Valve

    Hello, Mostafa, Please realize that: According to API 600, the seating surface (hard faced coating) material for wedge and seat shall be 13Cr or Co-Cr alloy. The standard does not say the wedge/seat ring material shall be 13 Cr. Regards TZL
  2. LTZ

    Automated Butterfly Valves upstream and downstream torques

    Assume you look at the butterfly valve from the top view, the disc shall close in the clock vise direction from the fully open position.
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