Contra-Shear® Externally Fed Rotary Screens

The Contra-Shear^® externally fed rotary screen is ideally suited for process and wastewater streams containing high fats, oils and grease loadings. The system operates by feeding the influent into a headbox, which distributes the flow evenly across the full length of the rear and upper external surface of the rotating drum.

As water passes through the screen, solids are retained on the outside of the screen drum and are carried by rotation around to the front of the screen. A fixed doctor blade (with adjustable tension) removes the solids from the screen. The screened water cascades down inside the drum and falls through the bottom, creating a vigorous backwash action.

This action, together with the use of internal water sprays, has a combined effect of self-cleaning the drum during each revolution.

For more information on the contra-shear externally fed rotary screen, please contact us.