Dual Filters

Dual Filters

A sand-anthracite filter or dual media filter/multi-media filter is primarily used for the removal of turbidity and suspended solids as low as 10-20 microns. Dual media filters provide very efficient particle removal under the conditions of high filtration rate. Inside a sand-anthracite filter is a layered bed of filter media.

Internally, the dual media filter is fitted with an inlet distributor and a bottom Colleting system. Externally, the system is fitted with frontal pipe work and isolation valves. Sand is used to remove the suspended particles and anthracite is used to remove the odor and color etc. to make the water fit for different applications. Gravels and pebbles are provided to support both the media. Periodically, the sand-anthracite filter will backwash, which changes the water flow through the sand-anthracite filter. Dual media filters are much more efficient in removing dirt as compared to pressure filters.