Fabric Filters are air pollution control devices that remove particulate matter from a gas stream by passing the dirty air through a layer of cloth. The particulate matter deposits on the cloth surface and the clean air passes through. Of all the air pollution control technologies, fabric filters are the predominant particulate removal device used in industrial processes today. Unlike electrostatic precipitators, where performance may vary depending on process conditions, fabric filters can maintain a particulate collection efficiency of 95% or better, even when the particle size is very small. Pulse Jet is largely defined by the way in which the collected dust is removed from the filter surface.