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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