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  1. janie09

    How do you think the bi-directional sealing for the triple offset butterfly valve?

    I want to know if the triple offset butterfly valve must need bi-directional sealing? And if, how to realize it?
  2. janie09

    Why use welded steel valves in district heating system?

    @Danlap Hi, Like you said, What's the difference between fully welded pipeline ball valve and district heating ball valve?
  3. janie09

    Why use welded steel valves in district heating system?

    Dear All, I want to know why use the welded steel ball valve and butterfly valves in the district heating system? What's the advantage? Thanks very much! Janie

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