Rotostrainer® Externally Fed Rotary Screen

Rotostrainer® Externally Fed Rotary Screen

The original self-cleaning wedgewire screen

With over 700 installations spanning over 25 years, the Hycor Rotostrainer screen is a self-cleaning, externally fed, wedgewire screen. Its fine screening technology spans several industries for solids/liquids separation, with proven repeatable wastewater results.

Used for pretreatment in wastewater plants, the Hycor Rotostrainer is renowned as an externally fed rotary screen as the industry choice. Various applications spanning decades include breweries and wineries, meat processors, food processors, tanneries, textile mills, petrochemical plants, and recyclers. The Hycor Rotostrainer can be used for solids separation and retention.

The screen is externally fed so that influent is directed under a baffle, then upward and over the length of the cylinder. The natural action of wastewater cascading through the screen creates a powerful backwash, which results in a continuously clean surface. Solids are caught on the outside of the screen surface and are removed by a tensioned doctor blade.

Opening sizes are available from 0.010" (.250 mm) to 0.100" (2.54 mm). Capacities range from 60 GPM (13.6 M3/H) to 7800 GPM (1771 M3/H) in a single unit. Additional models are available to handle higher capacities.


  • Primary doctor blade keeps cylinder surface clean.
  • Rotostrainer® has Automatic Doctor Blade Cleaner (ADBC)
  • Adjustable counter-weighted primary doctor blade without a spring tensioning mechanism minimizes accidental over-tensioning.
  • Removable headbox cover minimizes splashing and reduces housekeeping.
  • Internal spray bar built-in.
  • Corrosion-resistant stainless steel construction.


  • Spray bar is positioned within inches of the surface of the cylinder, benefitting applications with grease or those requiring small size screen openings.
  • ADBC wipes away solids, particularly sticky materials that build up on the primary doctor blade.
  • Minimal down-time and maintenance costs.
  • Please contact Flotek for more information on how the Rotostrainer can help you with your solids and liquids separation!
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