Device for filtering a liquid, particularly for filtering a polymer plastic melt

Abstract

A device for filtering a liquid, in particular for filtering a polymer plastic melt, has a housing which includes an inlet channel, a connecting channel situated in a shaft and a discharge channel, as seen in the flow direction of the liquid to be filtered, where the connecting channel has at least two filters arranged side by side and aligned across the flow direction of the liquid in the connecting channel, and the shaft is mounted in a bore in the housing so that it is axially displaceable and is liquid-tight, so that by axial displacement of the shaft, the two filters can be moved between a filtration position in which the inlet channel is connected to the discharge channel through the connecting channel, and an externally accessible cleaning position in which the connection from the inlet channel to the discharge channel is interrupted, and vice versa. As seen in the flow direction (10) of the liquid to be filtered, the connecting channel (4) has a first area (4a), which is arranged directly upstream from the filters (9a, 9b) and forms a single common liquid distribution space (4a) for the two filters (9a, 9b). Immediately following the first area (4a), there is a second area (4b) where the two filters (9a, 9b) are arranged side by side, so that the two filters (9a, 9b) partially overlap, whereby the first area (4a) and the second area (4b) of the connecting channel (4) having a cross section, as seen normal to the flow direction of the liquid to be filtered, which corresponds in shape to the shape of two overlapping circles.

Dependencies are inferred from the claim text.