"...It is said, the Source of Knowledge is its Authority..."

Through being the First-to-Patent, First-to-Market, First-to-Manufacture, First-to-Install and First-to-Operate as well as registering several subsequent patents on 16” Reverse Osmosis technology, William Graham is the undisputed source of knowledge on 16” RO. This knowledge is now utilised by GrahamTek, which has ultimately become the go-to place for Credible Science Information and Expert Knowledge regarding the application and design of 16” RO systems. 

Reduced Physical Footprint

Historically, footprint considerations were not a major issue. In more recent times however, the development of desalination close to luxury and ecologically sensitive areas makes it a requirement for project sponsors to reduce footprint as far as possible and to preserve the architectural and landscape silhouette to retain a natural camouflage and reduced impact on fauna & flora. The GrahamTek 16” RO system up to 36% smaller physical RO footprint than most other RO systems. For example, the physical footprint to deliver 1 000 000 litres per day using traditional 8” RO will require a physical space of approximately 50m² whereas the GrahamTek SuperFlux® 16” RO requires only 32m², including pump equipment. The associated benefits gained are directly related to:

  • Civil Engineering & Construction cost (CAPEX)
  • Infrastructure Maintenance Cost (Life-Cycle Cost)    
  • Environmental Impact: Desalination and Water Treatment plants are typically positioned close to water sources. This means these plants are built in ecologically sensitive environments that require extensive pre- and post-construction Environmental Assessments. Footprint reduction is key to reducing visual and physical Environmental Impact. 

Reduced Energy Use

GrahamTek SuperFlux® technology uses a Proprietary Energy Recovery technology. It is expected that with new membrane technologies the SWRO process is fast reaching the bottom threshold of 2-2.5 Kwh/m³. Whilst GrahamTek can retrofit current RO installations with new membranes that will achieve target benchmarks of 2-2.5 Kwh/m³, it has developed a new energy recovery unit that reduces the energy use from net 2.8 Kwh/m³ to 2.1Kwh/m³. 


GrahamTek has designed plant systems that require minimum decision and intervention requirements at operator level. This implies that high capacity plants can be operated by simple two - three push button controls. This control system is backed by a sophisticated real time monitor and near real time reporting system. The impact of this near real time reporting reduces the operator response time to rectify any operating inconsistency, reducing the gap between feedback and repair and consequently all associated transaction cost. In addition to the near real time reporting the plant incorporates a real time health monitoring system. This system functions as an early warning system to avoid a catastrophic failure on critical plant components and over all operating plant risk.

Improved Recovery Rate 

GrahamTek SuperFlux® uses a highly optimised Cross Flow Flux Configuration which makes it highly efficient for high TDS applications. Currently the GrahamTek SuperFlux®  achieves a recovery rate of around 44.9% after stage 1 RO in a +38 000 TDS environment. This highly optimised Cross Flow Flux Configuration has also positively affected the Boron retention, reducing the Boron level in product water to less than 0.6ppm from a feed value of +5mg/l (Maximum allowable value is 2.4mg/l WHO). This improved recovery rate reduces the comparative energy and feed water requirement. 


GrahamTek measures operational availability on two levels: (i) Operational Uptime and (ii) Critical Component Availability.

Operational Uptime: 

It is imperative that GrahamTek demonstrates availability to its clients prior to large plant commissioning. A typical evaluation will run for approximately 3,000 cumulative operating hours during which statistical deviations are measured in equipment performance and product quality. All Operational Availability to date has indicated values in excess of 99% (measured for both Quality & Quantity) when operated according to operational guidelines. Availability is significantly improved by redundancy and modularity of GrahamTek system designs; these designs allow modules of plants to be decommissioned in the unlikely event of a critical failure, or for scheduled maintenance. This allows the plant to operate at reduced increments of as little as 5% ensuring minimum disruption to demand water supply.  

Critical Component Availability: 

GrahamTek provides a sophisticated critical component insurance plan that ensures component availability to its operating plants globally through its Strategic Partnerships. This insurance cost is absorbed in the OPEX Life-Cycle cost of the plant. 

Demand Flexibility

While RO systems are designed based on the feed water conditions and tolerances, most RO facilities are not able to cope with changes in product demand. The highly granular and modular system design of GrahamTek SuperFlux® enables significant demand side flexibility for the clients of GrahamTek. This is achieved through integrated telemetry from product storage facilities to the central processing unit that turns RO banks on and off as demand fluctuation occurs. 

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