The world's most efficient passive intake screen system

Aqseptence Group Water Technologies' brand of Johnson Screens® passive intake screen system provides uninterrupted water withdrawal from lakes, rivers and oceans. The Johnson Screens® passive intake screen operates continuously and requires no downtime for cleaning or routine maintenance. Moreover, the system can be configured to meet US Environmental Protection Agency (USEPA) regulations for protecting aquatic life.

Maximum Efficiency

The combination of the non-plugging Vee-Wire® design and the patented internal flow modifier, provides a high open area while maintaining the lowest entrance velocity and pressure drop. This delivers a maximum water capacity with minimal entrainment and impingement.

Custom Designed and Engineered

With over 30 years of intake screen experience and hundreds of installations covering a variety of conditions, application engineers from Aqseptence Group Water Technologies can provide design and application assistance. From shallow rivers to deep oceans, the passive intake screen systems can meet site requirements anywhere in the world. To provide maximum efficiency, the Johnson Screens® passive intake screen is custom designed and engineered to each unique environment, resulting in a system which costs less to install, operate and requires less maintenance.

Less Maintenance

The passive intake screen system have no moving parts that can break down or wear out. This eliminates the need to replace worn parts or make other costly repairs. The controlled entrance velocity on the passive intake screen, along with the specially matched Hydroburst™ air backwash, keeps the system clean and operating properly.

Lower Cost

The unique and flexible design of the passive intake screen system results in lower initial costs, no moving parts, less maintenance needs and a simplified installation - allowing for a reliable, inexpensive water supply.


Based on the design of the Johnson Screen® passive intake screen systems, the patent half screen intake system provides uninterrupted, environmentally safe water withdrawal from lakes, rivers and oceans. The half screen intake system allows for the screen to be used in half the operational depth of water of the traditional passive intake screen system.

Design features include:
  • Low profile - half the water depth needed
  • Hydroburst cleaning system option
  • Passive intake screen - no maintenance
  • Vee-Wire construction
As water demands expand for cities and towns, water resources previously harder to withdrawn from, due to their shallow depth, now have become a more viable option.

The general rule-of-thumb for proper intake screen depth has been to allow a half diameter of operational depth clearance from top and bottom, to prevent silt from being sucked up from the bottom and creating a vortex on the top of the water.

  • Sits on a concrete pad and eliminates half the depth needed for the same flow
  • Functions identically to the standard Johnson Screen passive intake screen system
  • Uses the same control of flow distribution, with the patented multiple flow modifier design and Hydroburst system to keep 5n surface clean of debris
  • Standard sizes range from 1/2T - 12HC to 1/2T - 96HC intake screens and are typically applied in pairs
  • The half screen intake sits on a concrete pas and eliminates half of the depth needed for the same flow
  • The half screen intake
  • The half screen intake system is able to operate at half the water depth of traditional intake screen systems

VictoRae Environmental Sdn Bhd


22A, Lorong Kasawari 4, Taman Eng Ann, 41150 Klang, Selangor Darul Ehsan, MALAYSIA

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