An innovative version of the BDLG type, with cartridge filtering elements, represents a revolution of the normal approach to this type of machine. Less bulky than a normal static cartridge filter, reduces replacement costs and machine downtime, making demanding maintenance even less. Available in sizes 60, 75 and 90 and compatible with extruders from Ø 45 to Ø 100 mm, BDCG is in effect a screen changer, equipped with two filter cartridges positioned on the sliding plate. The filter replacement is fast and machine downtime is minimized.