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Leaf Filters

Salient Features:

1-100m2 filtration area is offered as per the requirment.
Contains Stainless steel filter elements, hence no repetitive cost, washing and maintenance of filter cloth.
Filtration rate are 2-3 times higher on same filter area.
Automatic cake discharge with mechanical or pneumatic vibrator options & spray nozzle for wet cake discharge.
It is an Ideal replacement for plate & frame filter. Closed system, no maintence due to SS filtration mesh, low retention of oil, less occupancy of space etc.
Offers very low% of unfiltered liquid retention in cake.
It is simple & economical bottom opening with 100% opening & optional butterfly valve for vertical PLF
Due to closed pressurized operating system hence no spillage & loss of liquid, which helps in handling volatile / inflammable liquids & clean working environment. Entire filtration cycle with cake discharge can be completed without even opening the filter from top.
It is compact & light hence large saving in floor area & supporting structures.
Pressure leaf filter can be completely automated with no human intervention.
It can be used for getting filtered liquids as well as cake.
Ideal for filtration of edible / non-edible oil, dewaxing, sulphur, copper, API chemicals, Carbon removable, etc.
Closed system, no maintence due to SS filtration mesh, low retention of oil, less occupancy of space etc.



How do the Pressure Leaf Filters work?


Leaf Filters are ideal for solid-liquid separation & work on principle of precoating & pressure. Pre-coating is done with the help of suitable filter aid about 0.5 to 1% (Bleaching earth, supercel, hyflo, superflo etc.) mixed with the liquid to be filtered. Unfiltered liquid is pumped into the filter vessel.
Initially the filter aid starts forming a precoat layer on both sides of the filter leaves, until then coludy material comes out of the filter. Once the layer is formed, pressure starts developing, restricting the impurities. Clear liquid flows from both sides into the leaves (filter elements), flows along the tubular channel & gets discharged from bottom of the leaf.
All the leaves are mounted on a common manifold. The leaves start getting choked on both the sides by impurities forming cake, which is in wet from. Once the leaves get choked completely, the pressure rises to 3 kg/cm² & the output flow almost stops. This means the batch size is reached. The pump is stopped & steam / air pressure is applied from the top (without dropping the filter pressure) to filter the material around the leaves held up in the tank & to squeeze the cake further & reduce the liquid retention in it. The hold up unfiltered liquid in the conical portion is taken back.