Particle emissions from industrial processes deteriorate environment quality. Bag filters are frequently employed to remove fine solid particles from process gases. Design of bag house is still Semi-Empirical in nature requiring field testing. Its increasing popularity in capturing fine particles demands better understanding in this field. This book provides insights of cake formation on flexible filter media. Effect of operating parameters on cake and filter properties is also addressed. Evolution of cake properties and plant stability issues are investigated. Plant is driven to unstable conditions and attempts are made to bring it to stable operation by manipulating the operating variable only. This book shall be useful for researchers in the field of gas cleaning, academicians, and process engineers.