How does a layer
Filter work?
A dual or multi-media filter typically contains two or more layers of filter media consisting of anthracite charcoal, sand, garnet, etc., plus a supporting (non-filtering) support layer at the bottom. The larger (but lighter) anthracite is on top and the heavier (but smaller) garnet remains at the bottom. The layers of filter media allow the largest dirt particles to be removed from the top of the media bed, with the smaller dirt particles being retained further and further down in the media. This allows the entire filling to act as a filter, allowing much longer filter run times between back flushing and more efficient particle removal.
Water flows through several layers of different grain size from the top to the bottom. During this process, sediments/contaminants are retained in the filter bed.
Due to the increasing contamination of the layer filter, the differential pressure in the filter bed increases and flushing becomes necessary. For this purpose, the layer filter is back flushed in counterflow and the impurities will be washed out. Due to the different densities and grain sizes of the media, the formation of the filter layers is maintained after back flushing. The back flushing can be initiated manually or automatically, by pressure monitoring, as well as quantity or time controlled.
Benefits: Your advantages
at a glance
Very high filtration rates
up to 50 m³/h m²High dirt holding capacity (500 mg/l)
Very low backflush water consumption of 0.1% to 1%
Continuous, fully automatic operation
Exceptional filtration quality due to matched filter media
Long service life of the filter media
Low space requirements
Modular design and ready-to-use
units or skids
Industries: Where They are used
Application areas: How they are used
