YXFC Multi-Cartridge Automatic Backwash FilterBrief IntroductionThe YXFC multi-cartridge automatic backwash filter can filter raw water and automatically clean and drain filter cartridges without interrupting the water supply system during cleaning. Compared with conventional filters, it features high automation, large treatment capacity, self-cleaning & self-draining function, uninterrupted water supply and wide applicability.Working PrincipleFiltration ProcessLiquid flows into the equipment inlet and passes from the inner side to outer side of cartridges, with solid impurities trapped on the smooth inner surface of cartridges. As contaminants accumulate, the differential pressure between the inner and outer walls of cartridges rises. Once the preset differential pressure is reached, the differential pressure switch sends a signal to activate the backwash sequence. Alternatively, the controller triggers backwashing automatically when the continuous running time hits the preset value on the built-in timer.Automatic Backwashing ProcessOnce the preset differential pressure or running time is reached, the backwash signal is transmitted and the pneumatic blowdown valve opens. The filter’s reduction motor rotates the central transmission shaft to drive the rotary backwash arm. When the arm aligns with the bottom of one cartridge, the inner cavity of this cartridge connects to the blowdown pipeline, cutting off the raw liquid inlet and linking the cartridge interior to the low-pressure blowdown zone. A backwash differential pressure forms between the cartridge’s outer clean side and inner dirty side, driving clean filtrate to reverse-flow from outside to inside the cartridge and flush contaminants attached to the inner wall into the blowdown pipeline. The backwash duration for each cartridge is generally 1.5 seconds. The rotary arm sequentially cleans every cartridge as it rotates. After one full rotation back to the home position, one complete backwash cycle finishes. Once the inlet-outlet differential pressure drops back to the initial level after one or multiple cycles, the filter resumes normal filtration mode.Technical Features & AdvantagesAutomatic continuous online filtration with uninterrupted flow during backwashing, cutting downtime and maintenance costs;Large total filtration area and low surface flow velocity reduce backwash frequency to save backwash water and operating costs;Adopts V-type filter elements with precise slits, high mechanical strength and long service life;Pulse backwashing design: blowdown valve opens only after aligning with target filter elements, delivering powerful, efficient and quick backwashing with low water consumption.Typical Application FieldsApplicable IndustriesWater treatment, steel, papermaking, mining, petrochemical, precision metal processing, municipal engineering, etc.Applicable LiquidsGroundwater, seawater, lake water, reservoir water, circulating cooling water, chilled water, spray water, heat exchange water, sealing water, bearing cooling water, oilfield injection water, process circulating water, machining coolant, cleaning water and more.