ElectroFlex Electro-deionization Systems (EDI)
Graver’s ElectroFlex EDI systems are factory assembled skids that are pre-engineered and designed to meet the purified water demands of the power, microelectronics, and general industry markets. These systems also provide continuous quality as well as 40-50% lower operating costs when compared to mixed bed DI. All this is accomplished using a combination of selective ion exchange membranes, ion exchange conductive resins, and electricity to remove ions from water rather than costly hazardous chemicals.
Typical Applications
- Power Generation: Steam makeup water
- Petrochemical: Steam makeup water
- All Industrial applications where demineralized or deionized water is needed for ultrapure processes
Advantages Over Mixed Bed Ion Exchange
• Complete internal control over water system – nothing leaves or comes into plant
• No inconsistent performance due to poor regenerations
• Continuous, not batch operation
• No disruptive regenerations
• No bulk storage of regeneration chemicals
• No waste neutralization required for regeneration chemicals
• Smaller system floor space creates more facility space for other uses
• No risk of cross contamination with other customer resins
• Reduction of environmental, health and safety risks
Operating Cost Savings
• Uses only electricity instead of chemicals to regenerate • No need for bulk acid/caustic storage
• No need for regeneration system or neutralization system
• Recycle of EDI reject (quality is better than RO feed)
• Can be recycled upstream to the RO feed for 100% recovery, zero waste production
• Water savings on both the processing and waste ends
• Or reject can be discharged with no further treatment
• Reduction in labor
• 50-75% less floorspace than ion exchange based demineralization


ElectroFlex Electro-deionization Systems (EDI)
Graver’s ElectroFlex EDI systems are factory assembled skids that are pre-engineered and designed to meet the purified water demands of the power, microelectronics, and general industry markets. These systems also provide continuous quality as well as 40-50% lower operating costs when compared to mixed bed DI. All this is accomplished using a combination of selective ion exchange membranes, ion exchange conductive resins, and electricity to remove ions from water rather than costly hazardous chemicals.
Typical Applications
- Power Generation: Steam makeup water
- Petrochemical: Steam makeup water
- All Industrial applications where demineralized or deionized water is needed for ultrapure processes
Advantages Over Mixed Bed Ion Exchange
- Complete internal control over water system – nothing leaves or comes into plant
- No inconsistent performance due to poor regenerations
- Continuous, not batch operation
- No disruptive regenerations
- No bulk storage of regeneration chemicals
- No waste neutralization required for regeneration chemicals
- Smaller system floor space creates more facility space for other uses
- No risk of cross contamination with other customer resins
- Reduction of environmental, health and safety risks
Operating Cost Savings
- Uses only electricity instead of chemicals to regenerate • No need for bulk acid/caustic storage
- No need for regeneration system or neutralization system
- Recycle of EDI reject (quality is better than RO feed)
- Can be recycled upstream to the RO feed for 100% recovery, zero waste production
- Water savings on both the processing and waste ends
- Or reject can be discharged with no further treatment
- Reduction in labor
- 50-75% less floorspace than ion exchange based demineralization

