Abstract: A new method for fully automatically manufacturing a fluid container with a pressure unit is described, which pressure unit is mounted in a fluid container. In a station the high-pressure container of the pressure unit is mounted with the closure and the bottom part and is clamped at the upper and lower ends by clamping means and is rotated by rotating means associated with the clamping means. The rotating pressure unit is welded by first laser means and by second laser means, whereas the laser beam of the first laser means being directed to a first joint area of the bottom part of the pressure unit with the container, and the laser beam of the second laser means being directed to a second joint area of the bottom part of the pressure unit with the container, which first and second joint area are separated at a distance to each other.

Abstract: A new method for fully automatically manufacturing a fluid container with a pressure unit is described, which pressure unit is mounted in a fluid container. In a station the high-pressure container of the pressure unit is mounted with the closure and the bottom part and is clamped at the upper and lower ends by clamping means and is rotated by rotating means associated with the clamping means.

Abstract: A novel system is described for manufacturing fully automatically pressure units (1) having a high pressure container (2) with a bottom part (3) and a closure (7) with a pressure control device (6), which pressure units (1) are to be mounted in a fluid container (5). In a production line (100) with a first station (110) the bottom part (3) and the closure (7) are mounted automatically to the high pressure container (2). In a second station (130) the bottom part 3) and the closure (7) are welded into the high pressure container (2), and in a third station (160) the containers (50) and the pressure units (1) are pre-assembled. In a fourth station (170) the pressure units (1) are welded into the containers (50).

Abstract: A novel pressure control device is provided comprising a first cylinder (3) at a predetermined excess pressure, a piston (4) with a sealing ring (5) being movable within said first cylinder, and a second cylinder (7). The first cylinder (3) is encompassed by the second cylinder (7) as to form a ring-shaped passage which is leading to the outside. A valve in said passageway is released and closed by a stem (14) of the piston (4). The open end of the first cylinder (3) is provided with at least one axially directed incision (37), such that the piston (4) with the sealing ring (5) introduced in the first cylinder (3) and covering the end of the incision (37) is in a non-pressurized position. The stem (14) has a stop element (15) which closes the valve in the upper position of the piston, wherein the piston stroke essentially defines the excess pressure.

Abstract: A novel pressure control device is provided comprising a first cylinder (3) at a predetermined excess pressure, a piston (4) with a sealing ring (5) being movable within said first cylinder, and a second cylinder (7). The first cylinder (3) is encompassed by the second cylinder (7) as to form a ring-shaped passage which is leading to the outside. A valve in said passageway is released and closed by a stem (14) of the piston (4). The open end of the first cylinder (3) is provided with at least one axially directed incision (37), such that the piston (4) with the sealing ring (5) introduced in the first cylinder (3) and covering the end of the incision (37) is in a non-pressurized position. The stem (14) has a stop element (15) which closes the valve in the upper position of the piston, wherein the piston stroke essentially defines the excess pressure.

Abstract: The present invention concerns a pressure control system with a pressure control device (1) for maintaining a constant predetermined excess pressure arranged in a fluid dispensing container (50; 60). The pressure control device comprises a first cylinder (15), a piston (13) movable within said first cylinder filled with a gas exerting said predetermined excess pressure, a second chamber (7), a passageway from the second chamber (7) to the outside of the device leading to the container (50; 60), a valve (18, 23) for releasing and closing said passageway. The second chamber is substantially a second cylinder (2) with a closed end (34) and an open end provided with a rim part (4), on which a closure (5) is mounted to close the second chamber, such that the second chamber is encompassing the first chamber, wherein the first chamber is part of the closure.