Bag filter , that is, use the suction nozzle inside the filter to suck off the dirt on the surface of the filter. During self-cleaning, the drain valve is opened, and the suction nozzle is connected with the sewage pipe. The pressure difference between the sewage pipe and the outside makes the suction nozzle produce strong suction. The suction bag filter has the following characteristics: high efficiency, compact size; reliable mechanical structure; small flushing flow rate requirements, the cleaning effect can be guaranteed even when the filter pressure is low; the self-cleaning process requires less water and does not cause downstream Interruption of the fluid supply.

That is, use the suction nozzle inside the filter to suck off the dirt on the surface of the filter. During self-cleaning, the drain valve is opened, and the suction nozzle is connected with the sewage pipe. The pressure difference between the sewage pipe and the outside makes the suction nozzle produce strong suction. The suction bag filter has the following characteristics: high efficiency, compact size; reliable mechanical structure; small flushing flow rate requirements, the cleaning effect can be guaranteed even when the filter pressure is low; the self-cleaning process requires less water and does not cause downstream Interruption of the fluid supply.

Rotary arm bag filter is a kind of multi-unit backflushing bag filter with compact structure. Sewage is filtered through the filter from the inside out. When the pressure difference between the inlet and outlet reaches the set value, backwash is performed. The gear motor rotates the rotating arm to the filter cartridge to be cleaned (positioned by the sensor), cuts off the inlet flow, and opens the drain valve. Down, the filtrate moves in the reverse direction for backwashing. Once the set time value for backwashing is over, the drain valve is closed and the next filter screen is backwashed.

Multi-unit backwash bag filter. The filter cartridge is equipped with a cylindrical filter for filtering. When the pressure difference between the outlet and the inlet reaches a certain value, backwashing is performed at this time, and the upper and lower two special three-way valves act to close the inlet flow and connect the sewage pipe; close the outlet Flow, turn on the backwash flow. The backwash water passes through the filter from the outside to the inside to flush out the filter residue, and is discharged through the sewage pipe.