The chemical industry generates dust through processes such as material handling, screening, blending and mixing. Contaminants can range from coarse grit to fine particulates, or mists and fumes. These contaminants can be hazardous to both workers and equipment. Cross-contamination with other materials is of concern because of the potentially harmful impact on product quality and safety. It is recommended to capture and control contaminants at source utilising various types of hoods or enclosures to remove the contaminant at or near the generation point and to prevent the fume or dust from migrating into the facility. Often there will be special problems caused by hazardous or corrosive materials. AAF has a very wide range of filter products and is able to offer special materials of construction. ATEX compliant equipment can be provided where required.