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A moving valve lid cooperating with a valve seat is provided in a valve body. The lid is connected by way of a spindle to a servopiston moving in a cylinder. The valve seat merges, on the side remote from the side, into a compensating cylinder in which a compensating piston connected coaxially to th

A moving valve lid cooperating with a valve seat is provided in a valve body. The lid is connected by way of a spindle to a servopiston moving in a cylinder. The valve seat merges, on the side remote from the side, into a compensating cylinder in which a compensating piston connected coaxially to the lid is guided. Those end faces of the lid and compensating piston which are near one another are of substantially the same size as one another. A hollow flow deflector is disposed in the valve body upstream of the valve seat and the lid has an extension medium inflow side which is of substantially the same diameter as the lid which extends into the flow deflector.

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A valve comprising a valve housing having an inlet port for connection to a pressure medium supply, an outlet port for connection to a pressure medium sink, a first cylindrical chamber between and in communication with said ports, a valve seat between said inlet port and said chamber, and a second c

A valve comprising a valve housing having an inlet port for connection to a pressure medium supply, an outlet port for connection to a pressure medium sink, a first cylindrical chamber between and in communication with said ports, a valve seat between said inlet port and said chamber, and a second cylindrical chamber spaced from said first cylindrical chamber; a valve lid disposed in said housing in seated relation with said valve seat to block a flow of pressure medium from said inlet port into said first chamber; a servopiston slidably mounted in said second cylindrical chamber to sub-divide said second chamber into a pair of sub-chambers; a spindle connecting said valve lid and said servopiston and extending through said cylindrical chambers; a compensation piston on said spindle and slidably mounted in said first chamber to sub-divide said first chamber into two sub-chambers, said sub-chamber between said compensation piston and said valve seat being in communication with said outlet port; means for selectively pressurizing at least one of said sub-chambers of said second chamber to move said lid relative to said valve seat; an extension on said valve lid extending upstream of said valve seat; a hollow flow deflector disposed in said housing and receiving said extension therein for deflecting a flow of pressure medium from said inlet port about said extension; and said lid and said compensating piston have mutually facing end surfaces of substantially the same diameter.