Passive screens are typically designed to meet regulatory requirements for a maximum slot velocity of 0.15 m/s (0.5 ft./s) which is the maximum velocity at which a juvenile fish can turn around or, swim away without being impinged onto a passive screen. This, combined with a typical slot width range of 2 to 10 mm (0.04 to 0.4 in.) will determine the screen sizing. The large open area and low velocities result in a highly efficient and compact water intake screen.
Key Features
- Low capital costs and no moving parts, and low maintenance needs
- Environmentally-friendly – this approach meets the EPA’s 316b regulations for fish protection
- No waste stream – there is no debris brought to the surface to be handled or disposed of
- Easy cleaning – with a periodic blast of compressed air using our Hydroburst™ system
- Non-plugging Vee-Wire®
- Three standard configurations – drum, tee and half screens
- Selection of materials available from 304 and 316L stainless steel for fresh water to Duplex and Super Duplex for seawater applications and Z-alloy (CuNi) for repelling zebra mussel attachment and anti-bio fouling
- Dual-flow modifier – provides low and even slot velocity (CFD modelling is available on demand)
