PE takes over and diffuses low dense blocking valve

The utility model discloses a PE takes over and diffuses low dense blocking valve, including the well body, valve rod cover and valve rod, the one end that the valve rod is arranged in internal portion has set firmly the spheroid, the both ends of the well body all set firmly the valve gap that has the passageway, the ladder groove has been seted up to the conduit wall, a lateral wall in ladder groove and the inner chamber of well body intercommunication, the ladder inslot is equipped with the cooperation spheroid and realizes sealed sealing washer, the sealing washer is equipped with the metal fender ring that offsets with it towards a lateral wall of passageway, it extends to the spheroid orientation and coordinates the spheroid realization sealed to keep off the spheroidal lateral wallof ring orientation, it extends and butt in the bottom in ladder groove back to a spheroidal lateral wall is outside to keep off the ring, it is equipped with the first elastic component that drives movable sealing ring and r