Mannesmann Rexroth Corporation

Linde Material Handling Gmbh

Edmund Kraft

Gunter Fertig

Richard Hofmann

Walter Kirsch

A control valve device () for the control of a dual-action consumer () has a control valve () that controls the connection of a pressure fluid line () that forms the admission side of the consumer () with a pump and an additional pressure fluid line () that forms the return side of the consumer () with a reservoir. A regeneration function allows the return side of the consumer () to be connected with the admission side of the consumer (). The regeneration function has a short circuit device () located between the consumer () and the control valve (). For the regeneration function, the connection of the additional pressure fluid line () that forms the return side of the consumer () with the reservoir can be blocked by a shutoff valve device () located between the consumer () and the control valve ().

Control valve device for the control of a consumer

The invention is a pipe rupture valve having an internal servovale that comprises a valve piston that, in a setting at a steering edge, blocks the connection between two internal pressure connections of the servovalve. At a distance axially to said steering edge the valve piston has an additional steering edge that separates, sealed against fluids, a pre-loaded spring of the valve piston (or a spring area accommodating this spring) from the pressure connections.

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Karlstadt, Germany

Edmund Kraft