| 摘要 |
<p>Device for de-aerating and aerating respectively of liquids flowing through a conduit, comprising a housing (1) having an inlet (3) and a cover (4) having at least one outlet (7) opening cooperating with a main valve provided in the housing, the stem (9) of which extending through the cover and carrying at its upper end a disc-like element (14) which cooperates in a piston-like manner with a cylinder chamber (15) above said. The stem has a duct (18), which constitutes a connection between said cylinder chamber and the main valve space under said cover, but is adapted to be closed by an auxiliary valve (22) connected to a float body (23) provided in the housing below the main valve. Said disc-like element has a lifting height which is a fraction of the (largest) diameter of the main valve. The piston element is positioned in the cylinder space in such a way that in an upper position it is just in sealing contact with the cylinder wall, and in a lower position it is just out of sealing contact with the cylinder wall.</p> |
