Skip to main content
Two Rotoshear® Internally Fed Rotary Screens at Installation Site

With more than 1,000 installations, Rotoshear® is a proven high-capacity fine screening technology for municipal wastewater treatment plants and many industries for various applications.

In wastewater treatment plants, the Hycor® Rotoshear® unit is renowned as an internally fed rotary screen for pretreatment and primary treatment to replace primary clarifiers. They are also used as sludge screens. Industrial users, such as meat processors, food processors, tanneries, textile mills, petrochemical plants, and recyclers, rely on it for product recovery and wastewater treatment. Pulp and paper mills use it for fiber recovery and rejects handling.  

How the Rotoshear Works

Our internally fed rotary screen operates with minimal attendance. Influent enters through the inlet and flows into a headbox. The headbox fills and the influent cascades over the weirs and contacts two sides of the rotating cylinder screen. As the influent hits the turning screen, the solids are caught inside the cylinder and the liquid passes through the screen into the process or on for further treatment. Diverters on the cylinder move the solids along the length of the screen to discharge. The unit is equipped with spray bar(s) to clean the screen.

Rotoshear has undergone continual updates to incorporate new design enhancements, and today it represents a complete family of screens. There are 12 models with custom features specific to various applications. Opening sizes range from 0.010" to 0.100" (.25 to 2.5 mm) and hydraulic capacities from 450 to over 13,000 GPM (102 to 2955 m3 /h). The material standard is 304 stainless steel, but 316 and L grades are available, as well. Heavy-duty models are available for heavy solids loadings.

Features & Benefits

Reduced Maintenance

Internally fed wedgewire drum screen
without doctor blade maintenance reduces maintenance costs and hours

Water drop with leaves

Proven design
with over 1000 installations from the early 1980’s

Provide various options

Different headbox designs and flighting
provides variety for a wide ranging solids loadings and solids types

Reduced Maintenance

No lube chain
decreases operator maintenance

Provide various options

Optional drain pan and discharge end enclosure
provides installation flexibility

Provide various options

12 model sizes to meet any application 
to meet any application 

Reduced Maintenance

External and optional internal spray bars
keep unit self-cleaning to reduce downtime and maintenance

Gallery

Case Studies