Johnson Screens has been developing passive screens since 1968. Since then, we have deployed over 4,000 passive intakes worldwide. This type of screen is particularly interesting for flow rates of up to 100,000 m³/day or more, depending on costs for submerged constructions.
Our high-capacity passive intake screens rely on our non-plugging Vee-Wire® with a patented internal flow modifier that creates a nearly uniform low-velocity flow through the entire screen surface. That reduces impingement and entrainment of debris while protecting aquatic life.
Unlike traveling screens, our passive intake screen systems have no moving parts that could break down or wear out, eliminating the need for replacement parts and costly repairs.
See an Eco-Friendly Solution to the Zebra Mussels Problem
Johnson Screens introduced an innovative approach to combat the Zebra Mussel infestation, which is detrimental for power plant water intakes.
We created an eco-friendly solution by introducing water intakes constructed with patented Z-Alloy wire which is far superior than traditional copper nickel wire.
Since the first installation in the J.H. Campbell Power Plant in 1993, we’ve seen the effectiveness of the Z-Alloy design provide years of Zebra Mussel protection.