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In mobile hydraulics pilot valves control pumps, motors and main stages. An influencing factor regarding the use of these valves is compact dimensions, which are realised in combining solenoids with the control pressure stage. Applied electrical power together with the corresponding pressure level will be explained in this presentation by showing two types of Proportional Pressure Reducing Valves (PPRV's). One will be a PPRV for various operating pressure levels and the other a High-Flow PPRV (HFPPRV) for high volume flows. Descriptions of function, design solutions, features and manufacturing techniques will follow as well as application of integrated electronics and simulation of solenoids.