Abstract: There is provided a system separator having a backflow preventer including a housing enclosing a main flow conduit, a valve seat inside the housing on the main flow conduit, and a valve body movable relative to the valve seat to close off the main flow conduit together with the valve seat in a closed position and to release the main flow conduit in an open position. The valve body is alternately movable between the closed position and the open position by at least one of a pressure difference in the main flow conduit or a force of a spring element, and the main flow conduit is divided in the area of the valve body into at least one outer flow conduit and one inner flow conduit, and the valve body encloses the inner flow conduit and forms at least one valve-body valve seat on the inner flow conduit.

Abstract: A full jet nozzle for use with a water cannon, the nozzle having a body that encloses a flow channel running along an axial direction, having an outlet opening provided at an axial end of the flow channel, which has an external circumference which encloses an outlet surface to form a flow cross-section. The flow cross-section has a substantially circular or annular base area. There is at least one radial cross-sectional extension of the outlet area is provided exclusively in an angular range of the outer circumference of a maximum of 180°. The full jet nozzle also has at least one radial cross-sectional extension formed by a slot running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area or has a recess running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area.

Abstract: A full jet nozzle for use with a water cannon, the nozzle having a body that encloses a flow channel running along an axial direction, having an outlet opening provided at an axial end of the flow channel, which has an external circumference which encloses an outlet surface to form a flow cross-section. The flow cross-section has a substantially circular or annular base area. There is at least one radial cross-sectional extension of the outlet area is provided exclusively in an angular range of the outer circumference of a maximum of 180°. The full jet nozzle also has at least one radial cross-sectional extension formed by a slot running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area or has a recess running with its longitudinal axis parallel to the axial direction, which opens perpendicular to the base area.