Abstract: The invention relates to a filter panel (1) for a drum filter (2) which is used for filtering off solid particles from a liquid. The filter panel (1) comprises a first side (3) being adapted to be attached to a drum (4) of said drum filter (2), a second side (5) being adapted to receive a filter cloth (6), and a plurality of through holes (7) extending from said first side (3) to said second side (5), each hole (7) defining one or more side walls (8). The filter panel (1) is characterized in that at least one of said holes (7) comprises an inclined side wall (8). The invention also relates to a drum filter (2) for filtering liquid.

Abstract: A disc filter includes a filtrate holding tank disposed below a series of disc-shaped filter members supported on a drum. Filtrate from the holding tank is used to backwash filter media on the disc-shaped filter members. Filtrate is discharged from the holding tank via a filtrate conduit. Bypass water is directed through a bypass conduit in the disc filter and mixed with the filtrate downstream of the filtrate holding tank. This assures that the filtrate used to backwash the filter media does not include bypass water.

Abstract: The invention relates to a filter panel (1) for a drum filter (2) which is used for filtering off solid particles from a liquid. The filter panel (1) comprises a first side (3) being adapted to be attached to a drum (4) of said drum filter (2), a second side (5) being adapted to receive a filter cloth (6), and a plurality of through holes (7) extending from said first side (3) to said second side (5), each hole (7) defining one or more side walls (8). The filter panel (1) is characterized in that at least one of said holes (7) comprises an inclined side wall (8). The invention also relates to a drum filter (2) for filtering liquid.

Abstract: A disc filter includes a filtrate holding tank disposed below a series of disc-shaped filter members supported on a drum. Filtrate from the holding tank is used to backwash filter media on the disc-shaped filter members. Filtrate is discharged from the holding tank via a filtrate conduit. Bypass water is directed through a bypass conduit in the disc filter and mixed with the filtrate downstream of the filtrate holding tank. This assures that the filtrate used to backwash the filter media does not include bypass water.

Abstract: A gyratory crusher comprises a first crushing shell mounted on a crushing head, and a second crushing shell mounted on a machine frame, a crushing gap being formed between said first and second crushing shells. A method of controlling the operation of said crusher comprises measuring a parameter being representative of the stresses to which the crusher is exposed during the crushing of material, determining an average value of said parameter, determining a deviation value of said parameter, calculating a peak value based on said average value and said deviation value, comparing said peak value to a reference value, and controlling the operation of the crusher in view of said comparison between said peak value and said reference value.

Abstract: A gyratory crusher has a crushing head on which a first crushing shell is mounted, a frame on which a second crushing shell is mounted, and a driving device, which is arranged with a rotating eccentric to cause the crushing head to execute a gyratory movement for crushing of material. The crushing head is connected to the frame of a rotation-restricting arrangement, which comprises a beater in a tank. Spinning of the crushing head is restricted by the beater being braked, during operation of the crusher, by a liquid contained in the tank.

Abstract: An inner shell has a first part of a lug-notch arrangement, which first part is arranged to co-operate with a second part of the arrangement to prevent rotation of the inner shell relative to a crushing head. The inner shell has a contact surface in its upper portion and is arranged to be pressed towards the lower portion of the crushing head by a pressing force which is obtained by tightening at least two threaded bolts, which are arranged in the upper portion of the crushing head such that their longitudinal direction is substantially parallel to the symmetry axis of the crushing head.