WTR® Cup and Drum Screens are a cost-effective means for fine screening of raw water. They are used in all types of applications where continuous screening is required and protection of downstream equipment is essential, including power plant raw water intakes (fossil and nuclear), industrial raw water, potable drinking water, irrigation, and numerous other types of plants.
Debris in the flow can overwhelm and damage rotating screens, cause serious condenser issues, or interrupt a water treatment process. Review of the source water is critical to the proper selection of the flow pattern, mesh aperture, rotating speeds, and materials of construction. WTR’s extensive knowledge base can greatly aid in determining the most suitable of these, along with offering alternatives and options beneficial to the design.
WTR Cup and Drum Screens are designed to automatically and reliably filter influent water and discharge recovered debris or marine life into the appropriate handling trough. Screens can be designed to handle typical water-borne debris as well as unusual grasses, seaweed, jellyfish, and many different types of debris.
The screens are available in various flow patterns including single entry cup (SEC) or double entry drum (DED).
To eliminate debris carry-over, the center flow pattern is recommended for total separation of influent from effluent. The SEC and DED are both center flow screens where the influent enters the center of the screen. Filtration is carried out by the rotation of the cup or drum and debris carry-over is completely eliminated.
Both flow patterns are available as fish recovery and return to meet environmental requirements. Specialized water-tight, hydraulically-stabilized fish recovery buckets allow for the quick recovery of juvenile marine life. Organisms are elevated to deck level where gentle sluice sprays aid in discharging them into a return trough for reinsertion to their indigenous environment.
After the fish sprays, the screen continues rotating past higher pressure debris sprays, washing the captured screenings into a separate debris trough for discharge or further disposal.
WTR Engineering, LLC, is a wholly owned subsidiary of WesTech Engineering, as of April 1, 2017. WTR designs and supplies mechanical water filtration equipment, such as raw water and wastewater screening for large flows, for both the municipal and industrial markets, including the power industry.