Swing Check Valve bodies are ordinary hinge, there is a door the same as the free flap valve against the valve seat sloping surface.

 
  • 旋啟式止回閥有一介鉸鏈機構,還有一個(gè)像門(mén)一樣的閥瓣自由地靠在傾斜的閥座表面上。
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