Hydrostatic valve assembly, hydrostatic transmission with the valve assembly, and hydrostatic drive with the transmission

Abstract

Hydrostatic valve arrangement for flushing pressure medium from at least one working line (4, 6) of a hydraulic circuit, comprising a flushing valve (28) with a first flushing port (30) for connection to a first working line (4) of the circuit, and with an outlet port (34) for connection to a pressure medium sink (T), wherein a pressure valve (40) is arranged in a pressure medium flow path of the arrangement from the outlet port (34) towards the pressure medium sink (T), a pressure valve (40) being arranged on the valve body of which a force equilibrium is formed, in which at least a pressure equivalent (64) acting on the valve body in the direction of a blockage of the pressure medium flow path and an opening pressure acting in the direction of an opening of the pressure medium flow path, which depends on the pressure at the outlet port (34), are incorporated, wherein a changing device (56) for shifting the force equilibrium is provided, characterized in thatthat the changing device (56) is designed in such a way that the opening pressure can be changed in stages or continuously via it.