A flapper valve assembly is described having an equalizing port assembly (32) with a bleed valve member (64) that is moveable between an open position and a closed position.

 
  • 本發(fā)明公開(kāi)了一種擋板閥組件,擋板閥組件具有補償口組件(32),補償口組件(32)帶有可在打開(kāi)位置與關(guān)閉位置之間移動(dòng)的排放閥元件(64)。
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