Dual-flow (double-entry) band screens — water enters both outer faces and exits through a central duct, doubling capacity and eliminating carryover in width-constrained intakes.
Intake Screening for Water & Desalination Plants
A dual-flow screen takes water through both the ascending and descending faces from the outside in, with the screened water collected in a central effluent duct. Like centre-flow it uses both faces (double capacity, no carryover) but with the opposite, outside-in flow path. Debris is captured on the outer faces and washed clear at the top.
Dual-flow screens emerged alongside centre-flow designs as engineers sought to maximise screening area within a fixed channel width. By making both faces active with a central exit, dual-flow screens roughly double the capacity of a same-width through-flow screen — making them a favourite for retrofits and sites where intake-channel width is constrained.
Configurations in service
Both outer faces screen; flow exits via a central effluent duct.
Double area per width — ideal where channel width is limited.
Debris washed from both outer faces into collection troughs.
Bucket and return systems available for ecological compliance.
An honest engineering assessment
Typical applications
Dual-flow band screens suit width-constrained intake channels, retrofits of existing structures, and large cooling-water and desalination intakes needing maximum capacity in minimum civil width.
The full intake-screen series
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Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreA companion intake-screen type — design, history and trade-offs.
Read MoreThe screening stage of the seawater intake series.
Read MoreIntake design integrated with SWRO pre-treatment.
Read MoreThe full seawater intake hub — structures, fouling, materials.
Read MoreBar, band and drum screens across our range.
Read MoreOur engineers select and size intake screening — dual-flow band and the full train — matched to your debris load, fish-protection duty and downstream process.
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