Abstract: A sluice apparatus intended for dosed introduction of abrasive or rubbing elements into, and removal from, a liquid-carrying pipe or tube line system includes a drum-like collecting vessel with three connecting valves--namely, two continuous flow valves and one catcher valve. Disposed inside the vessel is an apertured catcher basket which is spaced from the inside wall of the vessel and which has the geometry of a partial drum with two side plates. Its upper end is secured by means of holding tubes adapted to be supported on holding pins so that the basket can be easily inserted and withdrawn.

Abstract: An apparatus for cleaning the inside faces of pipes or tubes from foreign particles adhering thereto by means of flexible cleaning elements which are oversized relative to the pipe inside diameter to be cleaned, and which are forced through the pipes under hydraulic pressure. The invention is characterized by the fact that a screen is disposed in a casing in such a way that the sieve element is inclined in two different degrees of freedom relative to the centerline of the incoming liquid stream.

Abstract: An apparatus for cleaning the inside faces of pipes or tubes from foreign particles sticking thereto, by means of flexible cleaning elements which are oversized relative to the pipe/tube inside diameter to be cleaned, and which are forced through the pipes or tubes under hydraulic pressure is provided, wherein a bar screen disposed on the downstream side of the pipe/tube outlet separates the cleaning elements from the liquid. The apparatus includes a drum-shaped rotatable body having its axis of rotation disposed in a plane normal to the liquid stream direction of flow, on the inside of which there is a screen body or element arranged under such an angle relative to the direction of flow that a lower screen face extremity opens out into an outlet opening.