Heavy duty air filter reconditioning system

Apparatus for the spray cleaning of tubular filter elements and the like, comprising cabinet means defining a spraying chamber, support means in the chamber for a rotatable lower turntable disc, suspension means in the chamber for a vertically adjustable rotatable upper turntable disc, the upper and lower discs being adapted to grip a vertically oriented tubular filter element therebetween for rotation of the element by positioning the element on the lower disc and vertically adjusting the upper disc to engage the top of the element, drive means for rotating at least one of the discs to provide rotation of the filter element, and spray means in the chamber for cleaning at least one of the inner and outer surfaces of the filter element as it rotates, wherein the spray means comprises a spray structure including an inner spray device for cleaning an inner surface of a filter element received between the turntable discs, and an outer spray device for cleaning an outer surface of the element, the inner spray device including a vertical liquid pipe extending through a central opening in one of the turntable discs and terminating in an inner spray nozzle, the outer spray device including a further vertical liquid pipe disposed outwardly of the turntable discs and terminating in an outer spray nozzle, the respective spray devices being interconnected and mounted on vertical slide means for up-and-down movement to traverse the height of a filter element, the apparatus including second drive means for effecting vertical reciprocation of the spray structure, and wherein the outer spray nozzle comprises a vertically disposed tubing loop having a centrally disposed inlet on one side of the loop, and converging portions on the other side of the loop leading to an elongate vertically disposed spray outlet at the apex of the converging portions.