Abstract: A powder coating system includes a powder spray booth having a single fan module which is operatively connected to at least two filter modules, each capable of being moved into position beneath or along side the powder spray booth and then moved out of position in order to permit access to the booth by another filter module. Each filter module contains a number of cartridge filters and a powder collection chamber wherein oversprayed powder removed from the booth interior can be collected for reuse or circulation back to one or more spray guns associated with the booth.

Abstract: A powder collector having spaced parallel walls, one wall having at least one discharge opening. Three triangularly-positioned rods between the walls form a cage to retain a cartridge. A cartridge is positioned in the cage between the walls with an open end surrounding the opening in the wall. A screw in the wall opposite the opening presses the cartridge and a gasket between the cartridge and the wall against the opposed wall to seal the cartridge in the collector.