Automatic Backwash FilterThe automatic backwash filter consists of housing, filter cartridge assembly, backwash rotating arm, transmission shaft, motor reducer, position limit switch, control cabinet, electric/pneumatic valves, differential pressure controller and other components.The medium to be filtered flows from inside to outside through the wedge wire filter cartridges, and solid particles are trapped on the inner surface of cartridges. As contaminants accumulate, the differential pressure between the dirty side and clean side of the filter rises. Automatic backwashing will be triggered once the differential pressure reaches the preset value (or it can be controlled by time cycles).During backwashing, the motor rotates the backwash arm to the cartridge to be cleaned, cutting off raw liquid flow to this cartridge. The backwash valve opens, and the pressure difference between the filtrate side and backwash pipeline reverses a portion of clean filtrate into the target cartridge. Contaminant particles accumulated on the cartridge inner wall are stripped and flushed through the rotating arm into the backwash pipeline. Once the backwash duration for one cartridge expires, the backwash valve closes immediately. All cartridges are cleaned sequentially in this way, and the backwash cycle finishes after all cartridges are cleaned.Advantages of the FilterOnline cleaning without shutdown, programmable automatic control, large filtration area and safe operation.Main Specification & Parameter TableModel SeriesYXZBInlet & Outlet Nominal DiameterDN50-DN500Flange Standard for Inlet & OutletHG/T20592-2009, HG/T20615-2009Flow Rate20–8000 m³/hFiltration Precision25–1000 μmDesign Pressure0.6 MPa / 1.0 MPa / 1.6 MPa / 2.5 MPa / 4.0 MPaBackwash Trigger Differential Pressure0.05 MPa–0.07 MPaRequired Pressure for Backwashing≥0.2 MPaControl ModeTimer / Manual / Differential PressureFilter Element Type & MaterialWedge Wire, 5-Layer Sintered Mesh, Powder Sintered Cartridge (304 / 316L)Housing MaterialC.S (Carbon Steel) / SS304 / SS316LHousing Seal MaterialNBR, FKM