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Page 1 <br /> DRY AIR <br /> 1.0 Air entering a bag house type dust collector must be dry and oil free. <br /> DUST BAGS <br /> 2.0 Dust bags are made from a dacron or shaker felt filter material. <br /> 2.1 Dirty Dust Bags: <br /> As air containing particles is drawn through the dust bag, the particles are trapped <br /> on the outside of the bag. <br /> 2.1.1 A certain amount of particulate matter will always remain on the outside of the bag, <br /> even after shaking. This is normal and greatly improves the efficiency of the bag as <br /> a filter.This is called a"seasoned"filter bag. <br /> 2.2 As particles build-up on the dust bags,the resistance to air flow will increase. When <br /> this resistance reaches a point that flow has been restricted, it hampers the <br /> operation of the system. The bags should then be shaken to remove the particle <br /> build-up. <br /> 2.3 Shaking Dust Bags: <br /> With a manual system, move the bag rapper handle 10-12 times in such a manner <br /> that the rapper paddle strikes the bottom of the bags after eight(8) hours of <br /> operation. <br /> 2.3.1 Powered Bag Rapper: <br /> Rap 10-15 seconds after eight(8) hours of operation or as needed. <br />