The water to be treated enters the discount Backwashing Valve from the water inlet pipe, and is controlled by the valve, and the water flow enters each unit for filtration. The filtered water flows into the water outlet from the internal channel of the filter unit of the Backwashing Valve.

As the filtration progresses, the impurities adsorbed by the filter increase. When the pressure difference reaches the set value or the set time, the discount Backwashing Valve system enters the backwash mode. The backwash valve corresponding to the filter unit will change the direction of the water flow and close the water inlet and conduct the sewage outlet.
The backwash water of the Backwashing Valve is flushed into the filter through the outlet pipe under the action of pressure for washing, and the sewage is sent out from the sewage outlet. After washing, the Backwashing Valve returns to filter mode, and the backwash valve system backwashes the next unit until all units are washed and the system returns to filter mode. The discount Backwashing Valve can be used in water quality treatment and other fields.