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          flap valve

          standard:Q/TF-B27M.05, ISO,BS
          PN0.25MPa
          DN80-2000mm
          leakage:GB/T13927 Class D

          Flap valve belong to non-return valve which is opened under the pressure of medium and closed by the weight of itself. It is mainly used in sewage water project and may be used in water system.

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