Fluid filtration unit, comprises a housing with supply and removal channels, back flushing channels, and a sieve carrier with filter elements

摘要

An arrangement for filtering a fluid, especially a liquefied plastic, comprises a housing (1) with a supply channel (2), a removal channel (3) and back flushing channels (9,10). A sieve carrier (4,4a) is arranged laterally with respect to the flow direction and contains at least one filter element (5,6) in a sieve chamber (7,8). The carrier can be connected to the channels. A piston is located in a channel section that leads from the sieve chamber to the removal channel, and moves the clean material to the relevant flushing channel when the sieve carrier is in the back flushing position. At least two filter elements are located in the sieve chambers, and there are at least two channel sections and two back flushing channels. A pressure generator is located near the supply channels, and produces constant pressure.