A filter for filtering a flow of liquid, the filter comprising:
- (a) a pressure vessel having an inlet and an outlet and a sidewall;
- (b) a partition deployed within said pressure vessel so as to subdivide said pressure vessel into a first filter chamber and a second filter chamber, said partition being a plate having sides respectively facing said chambers and defining an edge and including a seal radially extending from said edge and in sealing engagement with an interior surface of said sidewall;
- (c) a first filter configuration deployed within said first filter chamber, said first filter configuration comprising a filter screens having filter openings of a first opening size;
- (d) a second filter configuration deployed within said second filter chamber, said second filter configuration comprising a filter screens having filter openings of a second opening size smaller than said first opening size, wherein liquid flowing from said inlet to said outlet passes sequentially through said first filter configuration and through said second filter configuration;
- and
- (e) an automated cleaning arrangement deployed to remove accumulated solids from said filter screens of both said first filter configuration and said second filter configuration during operation of the filter,
- wherein each of said first and second filter configurations is a filter disk comprising a spacer having first and second outward-facing filter screen support configurations, and having an outlet for flow of filtered liquid inwards to a central flow path, said first and second filter screen support configurations of said spacer supporting first and second filter screens forming corresponding first and second surfaces of the filter disk,
- and wherein the filter further comprises a flow diverter deployed in said central flow path for diverting a flow of filtered liquid passing along said central flow path from said first filter configuration so as to flow outwards from said central flow path and into said second filter chamber so as to undergo a second filtering by flowing inwardly through said second filter configuration and returning to the central flow path;
- said flow diverter positioned at least partially within said second filter chamber and including (i) an open end communicating with the first filter chamber, (ii) a closed end blocking the central flow path prior to reaching the second filter configuration, and (iii) lateral openings therebetween opening into said second filter chamber.