Abstract: A sludge extractor with a receiving tank, on which a suction connection for a suction element, which draws in a sludge-containing liquid, and a discharge connection for discharge element, which discharges the sludge-containing liquid, are mounted, and with a motor for driving a suction device in such a way that a negative pressure is created in the receiving tank, which negative pressure keeps a vacuum valve on the discharge element closed, is characterized in that the negative pressure acting on the vacuum valve is lower than the pressure which acts on the vacuum valve as a result of the sludge-containing liquid when a predetermined fill level is reached by the sludge-containing liquid in the receiving tank.

Abstract: A filter device with a UVC lamp for filtering fluids, with a lamp housing, which is installed in a flow of the fluid to be filtered and has a principal axis, is characterized by the fact that at least one cleaning element is arranged in contact with a fluid-side surface of the lamp housing and can rotate about an axis of rotation that coincides with the principal axis.

Abstract: A filter device for filtering flowing liquids comprises a compressible filter medium in a vessel and a device by which the filter medium can be compressed by means of an actuation handle, so that impurities can be pressed out of the filter medium. In addition, the filter device contains a multipath regulator which can be adjusted for filtering, back-rinsing and clear-rinsing by means of three flow paths. It is also possible for the filter device to be outfitted exclusively with a multipath regulator or a compressing device.

Abstract: The invention relates to a mud suction unit having a suction element which is connected to a receiving container and has a motor for the generation of a suction flow and also has a discharging element attached to the receiving container.

Abstract: The invention relates to a pressure joint (1) for pumps with a pump connection (3.8) and a first discharge connection (5.5) comprising a second discharge connection which can be throttled to produce a jet which is connected to the first discharge connection (5.5) on a first joint element (3.2) and which has a pump connection (3.8) which can be moved at an angle relative to a second joint element (3.1).