To separate solids from process and drainage water has always been a serious problem often difficult to solve in many industrial sectors and wastewater treatment plants.

IDRASCREEN™ represents the range of high capacity self-cleaning screen filters for the wastewaters pre-treatment. It is properly equipped with an inner washing system with low/medium pressure to do the periodical cleaning to avoid clogging phenomena, reducing cleaning maintenance and high costs.

IDRASCREEN™ is a product of United States research and technology. It has been designed to solve the problems that traditional methods were not able to. Separating solids from process and drainage water has always been a serious problem in many industrial sectors and at wastewater treatment plants. This problem has been faced by using various types of machinery and the results have been partially satisfactory at times and at others extremely disappointing: cylindrical separators cleaned by mechanical or spray system, vibrating sieves, static screen and various other devices have proved not to be able to solve the problems of solids separation.

IDRASCREEN™ results have exceeded expectations and from 1973 it has been introduced in a lot of applications, proving to be the only real self-cleaning screen, capable of working for many weeks with no assistance and little or no maintenance.

DRASCREEN™ comprehends both ECO and GF series. IDRASCREEN™ GF can be equipped with special movable blade scraper and manufactured in special execution suitable for installation directly on the channel.



  • Low initial investment and low installation costs
  • Low operating costs
  • High capacity with very reduced dimension (from 1/3 to 1/5 of the floor space of other screens)
  • Long life with little or no maintenance (the construction is simple and made entirely of corrosion resistant 304 and 316L stainless steel)
  • Low power costs and no consumption of additional water
  • Reduction of clogging phenomena
  • More efficient separated solids draining than in traditional filters with lower costs for removal and recycling of screenings.



  • Meat processing
  • Seafood processing
  • Fruit and vegetables processing
  • Sugar mills
  • Pig stock
  • Poultry stock and processing
  • Beer production
  • Wine production
  • Pharmaceutical industry
  • Pulp & paper
  • Chemical industry
  • Tanneries
  • Slaughter-houses
  • Dewatering paint sludges
  • Textile
  • Canning
  • Plastic industry



  • Fine screening
  • Replace primary clarifiers
  • Storm water overflow
  • Ocean outfall systems
  • Sludge screening


The influent to be screened is introduced into the headbox which is specially designed to slow down the flow and to distribute it. The influent inlet overflows a sealed weir into the rotating cylindrical screen.

The solids are retained on the outside screen surface and removed by the doctor blade. The screen effluent passes again through the cylinder, carries on an efficacious backwashing of the screen openings. Thanks to this, the portion of the screen cylinder screen to be fed is always perfectly clean. Moreover, the backwash avoids the mucilage formations inside the cylindrical screen.

IDRASCREEN™ is properly equipped with an inner washing system with low/medium pressure to do the periodical cleaning.


IDRASCREEN® Brochure (1.02 MB)


Idrapress™ has been designed for the conveyance and dewatering of various types of wastewater screenings and it is capable to reduce drastically the screenings weight and volume and consequently transport and disposal costs.
Screening and Separation