Abstract: The invention relates to a directional poppet valve (10), comprising valve pistons (16-22) arranged in a valve housing (12) for controlling a plurality of fluid connections (A, B, P, T), wherein the positions of each of the valve pistons (16-22) in the valve housing (12) can be changed by means of at least one actuating device, and wherein the fluid connections (A, B, P, T) are connected to one another or separated from one another alternately depending on the position of the valve pistons (16-22). The invention is characterised in that the valve pistons (16-22) are arranged inline along at least one axis (R), consecutively and/or at least such as to partially interengage, in the valve housing (12).

Abstract: A piloted proportional throttle valve has a valve piston (29) displaceably guided in the longitudinal direction in a valve housing (13) having a fluid inlet (2) and outlet (1). The front side of the valve piston (27) can be pressurized against a main valve seat (25) by fluid pressure acting on its back side. A pilot valve device has an actuating member (7) displaceable in the longitudinal direction by an electrically actuatable magnet system (4), and works with a pilot valve seat (37) in a bore (17) of the valve piston (29) connecting its back side to the fluid outlet (1) on the front side of the piston. The fluid pressure on the back side of the piston (29) is reduced for an opening motion when the pilot valve seat (33) is released. A flow baffle device (39) is disposed between the back side of the piston and the fluid inlet (2) of the housing (13) to build up the fluid pressure pressurizing the piston (29) against its closed position by introducing pilot fluid.

Abstract: A proportional throttle valve includes a valve piston (2) functioning as a variable orifice and displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5). Since a leading edge (6) of the valve piston (2) is formed by a control piston (7) of a flow regulator (8) for the fluid connection of the fluid inlet (4) and the fluid outlet (5), the flow control valve and the proportional throttle valve are functionally combined in one valve unit.

Abstract: A valve, in particular, a proportional pressure relief valve, includes an electrically controlled solenoid system (10) for the control of an operating part (12, 12a). The operating part cooperates with a valve element (26) extending longitudinally inside a valve housing (24) to release a fluid transport connection path between a fluid inlet (32) and a fluid outlet (34) in its open position and to block the through path in its closed position. An energy store, preferably in the form of a compression spring (58), is arranged between the operating part (12, 12a) and valve element (26) in a free gap between the two and tends to hold the valve element (26) in the direction of its closed position. The operating piece (12a) is embodied as a guide piston having a longitudinal guide for the valve element (26).

Abstract: A proportional throttle valve includes a valve piston (2) displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5) and pretensioned by an energy accumulator, in particular in the form a pressure spring, against a stroke stop (6) defining the closure position. A pressure limiting valve (7) is integrated in the proportional throttle valve (1). The side (8) of the valve piston (2) to allow the piston to move away from the stroke stop (6) in opposition to the pretensioning force when a predefinable pressure is exceeded at the fluid inlet (4).

Abstract: A proportional pressure control valve includes a valve box (10) having a pump (P), user (A) and reservoir (T) connections. Control piston (18) is guided in a longitudinally displaceably inside the valve box (10) for optionally connecting the pump connection (P) to the user connection (A) and the user connection (A) to the reservoir connection (T). A fluid-carrying connection is established between the pump connection (P) and a pilot chamber (20) of a pilot valve (22). The pilot valve (22) is controlled by a magnet system, especially a proportional magnet system (28). The proportional pressure control valve, for the fluid-carrying connection to the pilot chamber (20), has a bore (27) extending axially inside the wall of the valve box (10) and from a radial bore (9) of the housing (10) forming the pump connection (P).

Abstract: The invention relates to a valve device comprising a valve housing (2) and a valve piston (4) arranged in an axially displaceable manner in a piston bore (3) of the valve housing (2), via which piston a first load connection (A) and a second load connection (B) can alternately be connected to a pressure connection (P) and to a tank connection (T1, T2) under the action of a first solenoid magnet (5) and a second solenoid magnet (6), wherein the valve piston (4) can be displaced from a centered, preferably middle idle position for connecting the first load connection (A) to the pressure connection (P) and the second load connection (B) to the tank connection (T1, T2) in a first direction, and it can be displaced for the reverse fluid-conducting connection of the connections (A, B, P, T1, T2) in an opposite direction, wherein a first pilot control chamber (7) is provided, which pressurizes a first piston back side (8) of the valve piston (4), and a second pilot control chamber (9) is provided, which pressurizes

Abstract: The invention relates to a valve device comprising a valve housing (2) and a valve piston (4) arranged in an axially displaceable manner in a piston bore (3) of the valve housing (2), via which valve piston a first load connection (A) and a second load connection (B) can alternately be connected to a pressure connection (P) and to a tank connection (T1, T2) by the action of a first solenoid magnet (5) and a second solenoid magnet (6), a pilot control unit (7) being provided, which comprises a first pilot control chamber (8) that pressurizes a first piston back side (9) of the valve piston (4) and a second pilot control chamber (10) that pressurizes a second piston back side (11) of the valve piston (4), the first and second pilot control chambers (8, 10) being connectable via a respective fluid-conducting connection (12, 13) to the pressure connection (P), a first pilot control piston (14) and a second pilot control piston (15) being provided, which release or close a fluid-conducting connection (16, 17) betw

Abstract: The invention relates to a proportional throttle valve comprising a valve piston (2) which is displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5) and is pretensioned by an energy accumulator, in particular in the form of a pressure spring, against a stroke stop (6) defining the closure position. The invention is characterized in that a pressure limiting valve (7) is integrated in the proportional throttle valve (1), wherein said pressure limiting valve allows to influence the fluid pressure on the rear side (8) of the valve piston (2) in order to allow the piston to move away from the stroke stop (6) in opposition to the pretensioning force when a predefinable pressure is exceeded at the fluid inlet (4).

Abstract: The invention relates to a proportional throttle valve, comprising a valve piston (2) which has the function of a variable orifice and is displaceably guided in the longitudinal direction in a valve housing (3) having a fluid inlet (4) and a fluid outlet (5). Since a leading edge (6) of the valve piston (2) is formed by a control piston (7) of a flow regulator (8) for the fluidic connection of the fluid inlet (4) and the fluid outlet (5), the flow control valve and the proportional throttle valve are functionally combined in one valve unit.

Abstract: The invention relates to a proportional pressure control valve comprising a valve box (10) which has at least three fluid-carrying connections, especially in the form of a pump (P), a user (A) and a reservoir (T) connection, a control piston (18) being guided in a longitudinally displaceable manner inside the valve box (10) for optionally connecting the pump connection (P) to the user connection (A) and the user connection (A) to the reservoir connection (T). A fluid-carrying connection is established between the pump connection (P) and a pilot chamber (20) of a pilot valve (22), the pilot valve (22) being controlled by a magnet system, especially a proportional magnet system (28). The proportional pressure control valve according to the invention is characterized in that the fluid-carrying connection to the pilot chamber (20) has a bore (27) that runs axially inside the wall of the valve box (10) and extends from a radial bore (9) of the housing (10) forming the pump connection (P).

Abstract: The invention relates to a piloted valve, particularly a piloted proportional throttle valve, having a valve piston (29) displaceably guided in the longitudinal direction in a valve housing (13) having a fluid inlet (2) and outlet (1), the front side (27) whereof can be pressurized against a main valve seat (25) by fluid pressure acting on the back side thereof, having a pilot valve device comprising an actuating member (7) displaceable in the longitudinal direction by means of an electrically actuatable magnet system (4), working together with a pilot valve seat (37) in a bore (17) of the valve piston (29) connecting the back side thereof to the fluid outlet (1) on the front side of the piston, in order to reduce the fluid pressure on the back side of the piston (29) for an opening motion when the pilot valve seat (33) is released, a flow baffle device (39) being disposed between the back side of the piston and the fluid inlet (2) of the housing (13) for building up the fluid pressure pressurizing the piston

Abstract: A valve, in particular, a proportional seat valve or gate valve, includes a valve housing (10) and at least three fluid connections (1, 2, 3) extending through the valve housing. A main piston (18) extends in the valve housing (10). A pilot piston (24) for executing a pilot control (26) may be controlled by a current-carrying magnetic device (28). During an open pilot control (26), fluid from one (2) of the connectors (1, 2), controlled by the main piston (18), reaches the connector (3), controlled by the pilot piston (24), by a cross-sectional narrowing (38) in the main piston (19). The pilot control (26) and, as a result of the corresponding pressure drop, the main piston (18) achieves a control position, controlling both fluid connections (1, 2) with regard to fluid amount.

Abstract: The invention relates to a valve, in particular, a proportional pressure relief valve, comprising an electrically controlled solenoid system (10) for the control of an operating part (12,12a) which cooperates with a valve element (26), running longitudinally inside a valve housing (24) which releases a fluid transport connection path, between a fluid inlet (32) and a fluid outlet (34), in the open position thereof, and which blocks the through path in the closed position thereof, whereby an energy store, preferably in the form of a compression spring (58) is arranged between the operating piece (12,12a) and valve element (26) in a free gap between the two, which tends to hold the valve element (26) in the direction of the closed position thereof and the operating piece (12a) is embodied as a type of guide piston (70) which has a longitudinal guide for the valve element (26).

Abstract: The invention relates to a valve, in particular, a proportional seat valve or gate valve, comprising a valve housing (10) and at least three fluid connections (1, 2, 3), extending through the valve housing a main piston (18), running in the valve housing (10) and a pilot piston (24), for executing a pilot control (26), which may be controlled by means of a current-carrying magnetic device (28), whereby during an open pilot control (26), fluid from one (2) of the both connectors (1, 2), controlled by the main piston (18), reaches the connector (3), controlled by the pilot piston (24), by means of a cross-sectional narrowing (38) in the main piston (19) and the pilot control (26) and hence, as a result of the corresponding pressure drop, the main piston (18) achieves a control position, controlling both fluid connections (1, 2) with regard to fluid amount.