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MASFILT Mass Filters

mass filters

Masfilt are automatic machines where the treated liquid with low viscosity has to go through a 3m high layer of granular material with thinness from 0,5 to 3mm. The liquid motion happens from the top to the bottom.
The liquid goes through the granular mass with an apparent transit speed of 10-30m/h.
When Masfilt are used as filters, the filtering layer stops on the surface the bigger particles and slows down the motion of the smaller ones, which filter through the mass progressively at a speed from 10 to 1000 times lower than the liquid speed.
The particles kept in the filter are removed through back flush washing of the granular mass that can be fluidized with air or gas flow.

One or more of the following parameters can activate the backflush washing:

  • pressure difference;
  • time passed from the last washing;
  • quantity of filtered fluid;
  • turbidity outflow from the filter.

The height and the type of filtering granular masses are chosen according to the application purposes.
The most common granular masses are:

  • spheroidal quartzite;
  • activated carbon;
  • calcium carbonate;
  • zeolites;
  • anthracite.



  • Fully automatic operation.
  • Minimal energy consumption.
  • Low maintenance costs.
  • Low water consumption for back flush washing.
  • Use of easy available and low cost natural materials.
  • No waste production.
  • Unlimited life.

advantages and application areas

Application purposes

  • Reduction of turbidity and suspended solids content.
  • Removal of bad smells and flavours from drinking waters.

Organic substances absorption.

  • Heavy metals removal like iron and manganese.
  • Acidity neutralization.
  • Application fields
  • Civil and drinking waters filtration.
  • Preliminary treatment for water to be used in Ultrafiltration, Nanofiltration and Reverse Osmosis processes.
  • Cooling water filtration in cooling towers circuit.
  • Filtration of industrial processes waters.
  • Several applications combined with other separation technologies, in particular sedimentation.
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