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How does the backwash filter work in the daily routine

May 31, 2019

The backwash filter is a filter that can be filtered with low quality water. It has automatic backwashing to quickly remove impurities. It is usually installed in front of heat exchangers, air conditioning systems or actuators, and occasionally rinses to remove impurities. The structure of the device is simple in design, no need for supporting structure, saving space; it can automatically backflush, does not affect the system operation, and can maintain high flow rate and low pressure drop.


Under normal working conditions, the manual butterfly valve is opened, that is, the plane of the valve plate is parallel to the axis of the cylinder. At this time, the wrench is also parallel to the axis of the cylinder, the drain valve is closed, and the water flows directly from the inlet into the interior of the filter cylinder. The net is filtered and discharged from the outlet.


The backwash filter enters the backwashing state, and the manual butterfly valve needs to be closed, that is, the plane of the valve plate is perpendicular to the axis of the cylinder, and the drain valve is opened. At this time, the water flow enters the front end of the filter cylinder from the inlet, and the water flow is blocked by the valve plate because the butterfly valve is closed. It can only enter the outside of the filter cartridge from the front end mesh, and most of it flows out from the outlet. Since the drain outlet is opened, the pressure is reduced after the water in the rear section of the filter cartridge is discharged, so some of the water is backflushed into the net from the mesh at the rear of the filter. In the cylinder, the purpose of flushing the impurities adhering to the inner wall of the mesh cylinder from the outside of the filter screen is achieved, and impurities and sewage are discharged from the sewage outlet.www.inocofiltration.com