Hinged Door Filter Working principle Bag filter is a multi-purpose filtering equipment of new structure, small size, high efficiency and energy saving and well-adapted. It is easy and flexible to operate and it can work in closed spaces. It is a kind of pressure type filter unit. Liquid from the filter shell side inlet tube into the filter bag. The filter bag itself is installed in strengthened net. The liquid permeates filter bag to get qualified filtrate. The impurity and particle are intercepted by the filter bag. It is very convenient to change the filter bag. There is little material loss. Major advantages Small leak probability to ensure the quality of filtering Carrying greater pressure of work, loss of pressure is small, low operating cost. Energy saving effect is obvious, High throughput capacity, small size, capacity of storing large amount of pollutions.. Base on the working principle and structure of filtration system, it is convenient to change the filter bag. The filter has no need to clean. It can save both time and labour. The filter is widely used. It is flexible to use. There are many methods to install it.