Automatic sewage filter device Overview automatic sewage filter backwash automatically ZQG type sewage filter based on the use of the filter differential pressure (resistance) and rely on automation components and electric actuators, automatic filtering is done, clean-up, the filter sewage whole process. QDG automatic sewage filter Lu with ZQG automatic backwash sewage filter performance, automated and automatic filtering sewage and automatic backwash clean-up, the filter of the model can be based on the differential pressure control, timing control sewage cleaning time can be arbitrarily set according to conditions. And clean-up, sewage workers filtered in line with the completion of, you do not have to stop water running. The working principle, timing backwash sewage: regular cleaning of sewage, time can be set to operate for 2-24 hours. When the regular time, open the drain valve electric actuator, filter sewage after 30 to 60 seconds will turn electric actuator butterfly valve rotated 90 degrees to block cartridge bit, change the flow channels 30 to 60 seconds backwash sewage, steering valve reset the sewage was continued for 3 to 5 seconds, and then close the outfall. 2, pressure control sewage: pressure controller action value can be set to 0.03 to 0.7Mpa when the filter differential pressure reaches a pressure controller settings, the differential pressure controller action, the filter drain valve open, 30 to 60 seconds at the end of the steering valve reset and sewage was continued for 3 to 5 seconds, close the drain valve. 3, Manual control: button on the control box, direct control of the backwash, sewage. Technical parameters Working pressure: ≤ 1.6Mpa Working temperature: ≤ 150 ° C set pressure range :0.03-0 .07 Mpa resistance loss :2.0-6 .0 Kpa Flow 12-79m3 / h electric actuator power supply: AC380V, 50Hz washing time: 30 -60s the filter specifications :8-80 mesh / in the controller power supply: AC 220V, 50Hz, AC 380V, 50HZ