hat
2. filtre plan pòch bal san prentan apre sa, pandan l te nan filtration, la inlet pwesyon dlo kontra ansanm de disques pa sistèm kapòt pou fanm otomatikman, enben pwesyon sou mande pou backwash diminye anpil anpil.
eng
2.Filter cartridge design without spring, while in filtration, the inlet water pressure compact the set of discs by the diaphragm device automatically，thus pressure required for backwash is decreased greatly.