Johnson Screens

Johnson Offshore Intake Systems (JOIS™)

From shallow rivers to deep oceans from coastal to offshore installations JOIS™ can meet site requirements anywhere in the world. JOIS™ comprises two parts: one or more original Johnson Screens® passive intake screen(s) and the corresponding Hydro-burst™ air-powered cleaning unit.
  • Low capital costs and no moving parts, and low maintenance needs.
  • 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
  • Internal dual-flow modifier - provides low and even slot velocity (CFD modelling is available on demand)
  • Selection of materials - from 304 stainless steel for fresh water to Super Duplex for sea-water; Z-alloy (CuNi) for repel-ling zebra mussel attachment and anti-bio fouling in freshwater
  • Highly efficient
  • Custom-designed and engineered
  • Low operating costs
  • Low capital costs
  • Environmentally-friendly: EPA Rule 316b-compliant and also compliant with UK fish protection laws
  • Easy and quick to install
  • Low head loss
  • Compact design
  • Fully automated cleaning
  • Submerged and offshore
  • MaxFlow™ Intake design – enabling up to 40% higher flow
Intake screens are generally used to filter raw water extracted from surface supplies to eventually be used as cooling water, process water and other applications
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