Abstract: A pressure filter having a fluid compartment with a fluid inlet, at least one filter surface in the fluid compartment having a plurality of apertures, one side of the filter surface being restricted by the fluid compartment and the other side thereof being restricted by a filtrate compartment and having a filtrate outlet, and a backwasher means. The backwasher means includes a backwashing head sweeping over the filter surface and sealing a part thereof with respect to the fluid compartment. It restricts a backwashing compartment having at least one suction chamber open in a slot-like manner to the filter surface and having connected thereto a reject drain. A resiliently acting pressure unit is associated with the slat-like or plate-like backwashing head, the pressure unit pressing the radial outer portion of the backwashing head axially towards the filter surface. By this, a uniform contact pressure of the backwashing head against the filter surface in radial direction is guaranteed.

Abstract: A pressure filter has a fluid compartment with a fluid inlet and at least one filter surface in the fluid compartment having a plurality of apertures, one side of the filter surface bounding the fluid compartment and the other side thereof bounding a filtrate compartment having a filtrate outlet. The backwashing system includes a backwashing head sweeping over the filter surface and sealing a part thereof with respect to the fluid compartment. The backwashing head restricts a backwashing compartment having at least one suction chamber open in a slot-like manner to the filter surface and having connected thereto a reject drain. The filter includes two filter surfaces located in the front side range of a hub. The hollow shaft is rotatably supported within the hub. The hollow shaft is coupled at its front sides to a respective backwashing head and at its cylindrical part to a drive means located outside of the fluid compartment.

Abstract: Described is a pressure filter comprising a fluid compartment with a fluid inlet, at least one filter surface in the fluid compartment having a plurality of apertures, one side of the filter surface being restricted by the fluid compartment and the other side thereof being restricted by a filtrate compartment having a filtrate outlet, and a backwashing means. The backwashing means includes a backwashing head sweeping over the filter surface and sealing a part thereof with respect to the fluid compartment. It restricts a backwashing compartment having at least one suction chamber open in a slot-like manner to the filter surface and having connected thereto a reject drain. The slot-like aperture of the suction chamber is formed in such a manner that each aperture of the filter surface, independent of its radial position, is swept over by the slot-like aperture approximately in the same space of time. Accordingly, a uniform cleaning process of the filter surface by the backwashing head results.