Used sand coolers Type DWFA serve for the cooling of hot foundry sand. The DWFA type used sand cooler consists of a vibrating conveyor made with an air-permeable bottom, a stationary exhaust hood, a moisturizing unit, a fan and a control unit.
The sand is cooled under optimum heat transfer conditions in the fluidised bed by evaporation of water. The final moisture level is adjusted by the precisely controlled addition of water according to the temperature and throughput.