Duplex Filter known as parallel switching filter is composed of two sets of stainless steel filters in parallel .With its reasonable and novel structure, good sealing, strong flow capacity, easy operation, and many other advantages, Duplex filter becomes a widely applied, strong adapted multipurpose filtering equipment. The small probability of filter bag side leakage is to able to guarantee the filtration precision, The filter bag can be quickly replaced and there’s little filter logistics cost and the operation cost is low.