Abstract: The invention relates to a spraying device, a cleaning machine for cleaning medical, pharmaceutical and/or laboratory utensils, a retrofitting device for retrofitting a hydraulic spraying device and a method for cleaning medical, pharmaceutical and/or laboratory utensils. At least one washing arm (3, 3a) is rotatably arranged on an axle (4) and can be supplied with cleaning fluid from a cleaning fluid supply line (5) in the axle (4). The washing arm (3, 3a) is provided with outlet openings (6) from which jets of cleaning fluid can be directed onto the utensils (8). The spraying device (2) has a drive device (9) for actively driving the washing arm (3, 3a). The drive device (9) comprises a turbine (11) which is in operative connection with the washing arm (3, 3a) in such a way that a rotation of the turbine (11) leads to a rotation of the washing arm (3, 3a). The drive device (9) also has a drive fluid line (10, 10a) separate from the cleaning fluid supply line (5).

Abstract: A coupling device for a sealed coupling of first and second pipe sections, which are movable with respect to one another and at the ends of which respective flanges are fastened to be mutually sealed. The end face of the second flange, which is directed toward the first flange, includes an annular groove and a sealing element is disposed within the annular groove. The annular groove is configured to be subjected to pressure so as to press the sealing element against the end face of the first flange. The sealing element is a sealing ring made of elastic material.

Abstract: A spraying arm for a cleaning machine for cleaning medical, pharmaceutical, and/or laboratory utensils is divided into two half-arms by a rotary coupling supplying spraying agent to and rotationally supporting the spraying arm around a vertical rotational axis. First outlet nozzles in the two half-arms are oriented to produce first spraying-liquid jets in such a way that, when looked at from one end of the spraying arm, all of the jets in the two half-arms are aimed in the same direction. Horizontally oriented second outlet nozzles are arranged at the free ends of the spraying half-arms in such a way that, when looked at from one end of the spraying arm, the second spraying-liquid jets emerging essentially horizontally from the two half-arms proceed in opposite directions for driving the spraying arm around the rotational axis of the rotary coupling.