Abstract: Shut-off valve for a pressure accumulator vessel for a medium, wherein a valve housing has a valve chamber with an intake opening and an outlet opening facing the pressure accumulator vessel, a movable piston, and at least one spring, wherein the piston has at least one axial connecting channel and is guided in an axially movable manner by at least two sealing elements arranged in the valve chamber, wherein a first effective piston surface of the piston, the first effective piston surface facing an inlet region of the valve chamber, and a sealing body form a valve seat, and wherein, by changing the pressure in an accumulator region of the valve chamber, the accumulator region being adjacent to a second effective piston surface, the piston is axially movable and a passage opening arranged between the intake opening and the outlet opening may be reversibly closed and opened, wherein, in the unpressurized state, the passage opening is kept open by the spring.

Abstract: A pressure shut-off valve unit for a pressure accumulator vessel. A valve housing has a valve chamber with an accumulator region, an intake opening and an outlet opening facing the pressure accumulator vessel. A piston has at least one axial connecting channel, a first effective piston surface facing an inlet region of the valve chamber and a second effective piston surface adjacent to the accumulator region, the piston being axially movable via a change in pressure of the accumulator region of the valve chamber. Sealing elements are arranged in the valve chamber and which are configured to guide in an axially movable manner the piston. A sealing body of the at least two sealing elements or the valve housing form a valve seat, and a passage opening arranged between the intake opening and the outlet opening is reversibly closed and opened via a change in pressure of the accumulator region of the valve chamber. In a unpressurized state, the passage opening is kept open by at least one spring.

Abstract: A pressure shut-off valve unit for a pressure accumulator vessel. A valve housing has a valve chamber with an accumulator region, an intake opening and an outlet opening facing the pressure accumulator vessel. A piston has at least one axial connecting channel, a first effective piston surface facing an inlet region of the valve chamber and a second effective piston surface adjacent to the accumulator region, the piston being axially movable via a change in pressure of the accumulator region of the valve chamber. Sealing elements are arranged in the valve chamber and which are configured to guide in an axially movable manner the piston. A sealing body of the at least two sealing elements or the valve housing form a valve seat, and a passage opening arranged between the intake opening and the outlet opening is reversibly closed and opened via a change in pressure of the accumulator region of the valve chamber. In a unpressurized state, the passage opening is kept open by at least one spring.

Abstract: Shut-off valve for a pressure accumulator vessel for a medium, wherein a valve housing has a valve chamber with an intake opening and an outlet opening facing the pressure accumulator vessel, a movable piston, and at least one spring, wherein the piston has at least one axial connecting channel and is guided in an axially movable manner by at least two sealing elements arranged in the valve chamber, wherein a first effective piston surface of the piston, the first effective piston surface facing an inlet region of the valve chamber, and a sealing body form a valve seat, and wherein, by changing the pressure in an accumulator region of the valve chamber, the accumulator region being adjacent to a second effective piston surface, the piston is axially movable and a passage opening arranged between the intake opening and the outlet opening may be reversibly closed and opened, wherein, in the unpressurized state, the passage opening is kept open by the spring.