Multi Grade Filter
The MGF works on principle of retention and removal of physical impurity in a graded manner through Voids of the filtering media.
The physical impurities of raw water i.e. suspended solids, dirt, dust, & all visible particles are removed in Multi Grade Filter up to 50 micron.
Multi grade filter is a depth filter that makes use of coarse and fine media mixed together in a fixed proportion. This arrangement produces a filter bed with adequate pore dimensions for retaining both large and small suspended particles. This filter performs at a substantially higher specific flow rate than conventional filters.
This filter performs at a substantially higher specific flow rate than conventional filters. Specific flow rates of 15-30m/h have been successfully obtained for treating water containing 25-50ppm suspended solids respectively to produce a filtrate with less than 5ppm.
Various variants available according to requirements for ion removal, dechlorination, odor removal and colour removal.
The filter media is cleaned by backwash system. After back-washing the filter is rinsed with raw water and after the required quality of water is achieved the filter is put back into service. Depending on the filtered water quality required back-washing is either done with raw water or filtered water.