Poppet valve assembly used in regions of mobile working machine e.g. excavator, has main stage that is closed and opened according to control of flow regions by positioning of hydraulic position-controlled precursor

摘要

The poppet valve assembly has a main stage and a hydraulic position-controlled precursor. A second volumetric flow region is larger than the first volumetric flow region. The main stage is closed, when the first flow region is reproducibly controllable by the precursor. The main stage is opened, when the second flow region is controlled by the positioning of the precursor. A main piston valve (7) of the main stage is moveably received in a cartridge case (1).