| 摘要 |
An apparatus for feeding and metering fluid components to a mixing head, in particular for metering and feeding reactive chemical components to a high pressure mixing head. The apparatus comprises at least a first and second transfer cylinder whose control unit is fed with hydraulic fluid from a single source of constant pressure, and whose component pumping unit is connected to a tank for the component, respectively to an inlet aperture for the component in a chamber of the mixing head, by means of a proportional servo valve which is controlled in relation to the rate of flow of the components so as to keep both the pressure and the flow of the components to be mixed constant. |
