Rotary cartridge filter with attachments

A rotary screen changer comprising:

• a rotary filter disc with a fluid inflow side and a fluid outflow side wherein said rotary filter disc has an annular area comprising a series of filter chambers, each said filter chamber comprising:
• a machined area in the fluid inflow side of said rotary filter disc;
• side walls, wherein said side walls are formed by webs, each said web separating adjacent filter chambers;
• a bottom portion comprising a plurality of drain holes wherein each of said plurality of drain holes has a bottom attachment;
• and
• a plurality of cylindrical filter cartridges comprising a solid metal top that is shaped to provide even flow within said filter cartridge;
• said bottom portion comprises a removable plate which is machined to have a flow encouraging contour and is a support for said cylindrical filter cartridges which are mounted thereto;
• and
• each of said plurality of drain holes comprises one of the plurality of cylindrical filter cartridges attached thereto by way of said bottom attachment therein placing each of said plurality of filter cartridges in the fluid flow path;
• where, in operation, fluid flows from said inflow side of said filter rotary filter disc, into said filter chamber, through said filter cartridge and through said bottom of said filter chamber to said outflow side of said rotary filter disc.