Hydac Fluidtechnik Gmbh

Martin Grill

Peter Bruck

Philipp Hilzendegen

A valve, in particular a 4/2-way slide valve (), includes a valve piston (), which is guided in a longitudinally movable manner in a valve housing (), for selectively connecting and disconnecting fluid connections in the valve housing (), such as a pressure supply connection (P), a tank connection (T), and two utility connections (A, B). A magnetic system (), to which current can be supplied, controls the valve piston (). When no current is supplied to the magnetic system (), the control pressure at one of the utility connections (A, B) can be set, in particular limited, by a control device () arranged in the valve housing.

Valve, in particular a 4/2-way slide valve

A pressure-limiting valve with feed function includes a valve housing () having a working connection (A) and a tank connection (T). A spring-loaded pressure-limiting valve piston () is mounted and longitudinally movable in the valve housing (). A spring-loaded non-return valve piston () for the implementation of the feed function is designed as a hollow piston and is mounted to be longitudinally movable in the valve housing ().

Pressure-limiting valve

A proportional pressure-regulating valve () for actuating a first fluid connection (f) from a working connection (A) to a tank connection (T) and a second fluid connection (f) from a supply connection (P) to the working connection (A), includes a regulating piston () guided movably in a valve housing (). The regulating piston opens the first fluid connection (f) and closes the second fluid connection (f) when in a first position, and closes the first fluid connection (f) and opens the second fluid connection (f) when a second position. The regulating piston () can be displaced from a first position into a third position when the first fluid connection (f) is open by the total differential pressure produced when fluid flows through. When the regulating piston () is in the third position, the first fluid connection (f) is opened with an enlarged opening cross section compared to the first position, and the second fluid connection (f) remains closed.

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St. Wendel, Germany

Martin Grill