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Shallow sand filter rapid sand filter system consists of multiple standard unit, which has a unique water and water collectors, automatic flush valve has a unique two-way, multiple standards in the normal system operation can be realized in the rapid sand filter backwash individually, automatic process control. With small backwash water, equipment is easy to install, easy to operate and so on. The equipment flow, and no maintenance. According to different user requirements, there are two series of vertical and horizontal. Suitable for industrial and domestic water quality treatment of circulating water system