Johnson Screens Marks 50 Years in Water Intake Innovation

Imagine a city, factory, or agricultural field suddenly cut off from its water supply. The consequences would be catastrophic. Water serves as both the source of life and the lifeblood of industry. The challenge of securing safe, reliable, and sustainable water resources from rivers, lakes, and oceans remains a global priority. Johnson Screens, a company with a long-standing legacy, has addressed this critical need through its innovative passive water intake systems.

In 1968, Johnson Screens pioneered passive water intake technology with its proprietary Vee-Wire® system, marking a watershed moment in water resource management. Over fifty years of continuous refinement and more than 4,000 successful global installations have cemented the company's leadership in this field. These passive intake systems provide uninterrupted water extraction from various sources, delivering dependable water supplies across multiple sectors.

The company's high-capacity intake model initially set industry standards through its exceptional efficiency. This design combined the non-clogging Vee-Wire® technology with patented internal flow regulators, achieving both high open area ratios and market-leading low entry velocities with minimal pressure drops. Crucially, the absence of underwater moving components eliminates downtime risks from mechanical failures or wear. The integration of Hydroburst air backwash cleaning technology further reduces maintenance requirements while ensuring long-term operational stability.

Responding to growing demand for shallow-water applications, Johnson Screens developed its half-screen intake model. While maintaining full functional parity with the high-capacity version, this adaptation requires only half the water depth, significantly expanding deployment possibilities. The 2018 introduction of Max-Flow™ intake systems represented another technological leap, delivering 40% greater flow capacity than previous models through redesigned internal flow regulators.

Johnson Screens offers multiple material options for its passive intake systems, including stainless steel, super duplex steel, and NSF-certified Z-Alloy. All systems fully comply with Section 316(b) of the U.S. Clean Water Act, providing environmentally responsible, fish-friendly solutions that minimize aquatic organism impingement.

These passive intake systems serve critical functions in power generation facilities, desalination plants, and cooling stations worldwide. Whether supplying cooling water for industrial complexes or potable water for urban populations, the technology delivers customized solutions for varied requirements.

The proliferation of zebra mussels has threatened water intake infrastructure globally. Johnson Screens addressed this challenge through its patented Z-Alloy screen material, first installed in 1993 at the J.H. Campbell Power Plant. This innovation provides long-term protection against mussel infestation without chemical treatments.

Compared to conventional methods, passive intake technology offers multiple sustainability benefits:

• Environmental protection: Minimizes ecological impact on aquatic ecosystems
• Reduced maintenance: Absence of submerged moving parts lowers operational costs
• Operational reliability: Vee-Wire® design and Hydroburst cleaning ensure consistent performance
• Adaptability: Multiple configurations and materials suit diverse applications
• Regulatory compliance: Meets all relevant environmental standards

Notable installations include:

• Cooling water supply for power generation facilities
• Feedwater systems for desalination plants
• Process water solutions for oil and gas operations
• Municipal drinking water infrastructure
• Agricultural irrigation networks

The evolution of passive intake systems focuses on intelligent automation and tailored solutions. Future iterations will incorporate real-time monitoring and adaptive operation based on water quality parameters, while increasingly customized designs will address specific client requirements.

Johnson Screens continues to drive innovation in passive intake technology, developing smarter, more efficient solutions for sustainable water resource management worldwide.