Filters for liquids

w.m.t. - water and mechanical technology

We design and manufacture filtering systems for liquids with filters:

  • pressurized flat bed filter FLAT-BED
    • with disposable filter media
    • with a permanent continuous fabric TBF Blow-Off filter media
  • liquid vacuum filter LIQUID VACUUM
    • with disposable filter media
    • with Wedge-Wire permanent filter media
    • with permanent continuous fabric belt filter media with:
      • internal return T.B.F.
      • external return E.T.B.F.
    • with permanent filter media under capillary flow SANDWICH-PANEL
  • precoat filter PRE-COAT
    • with flat bed filters
    • with primary filters with mesh-covered perforated tubes and vacuum liquid filters secondary
    • with primary filters with mesh-covered perforated tubes and pressurized flat bed filters secondary
  • pressure and vacuum filter with capillary flow
    • with permanent filter media
      • CP – CHIPS PANEL
  • deep bed filter
    • with air expansion of the filter bed SAND FILTERS
    • with the filter bed washing through a hydro-cyclone scrubber DEEP-BED
  • gravity filter
  • basket filter
    • manual and automatic
    • individual and dupllex
  • a continuous backwash CONTINUOUS

In industrial filtration processes and in the parameters of filters for liquids, we often worry about the size of the particles, present in the filtered process liquid, above a certain required value, without posing the problems: nor of the quantity of these particles, nor of the quantity and size of the particles lower than this threshold value.

Therefore, speaking of filtering degree, referring only to the particle size of the solid particle present in an industrial process fluid, it does not make sense if the required value is not associated with the maximum allowable quantity for each different class of particle size.

The performance of a filter should be identified by two measurement units for example: 20 μm with 250 p.p.m. of suspended solids contained in the filtered liquid.

W.M.T. has developed a research, in recent years, aimed at the study and classification of industrial filtration processes according to the main mechanical processes, both removal and deformation of material, therefore referring to processes of: machining of machine tools, lamination or drawing; aimed at defining the associated filtering classes: the processing, the type of filter to be used for the processing, and the maximum solid particulate allowed for each class in order to guarantee the highest quality in the manufacturing process.

The flow rate of the filter must be determined according to:

  • the pollutant;
  • of the process liquid;
  • the permeability of the filter. the pollutant;
  • of the process liquid;

For the determination of the above data, the following test factors must be considered:

  • The sample of the process liquid was taken for use.
  • The values ​​expressed constitute the average value obtained on process liquid samples taken before and after the self-cleaning cycle of the filter.
  • The concentration of suspended solids was determined by filtering each sample with calibrated nylon nets of 5, 10, 20, 40, 60 and 100 μm not sequentially.

The data expressed are the average of 345 filtering systems tested for more than a year.