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BloX20 EDI modules

BloX20 EDI modules are electrodeionization (EDI) modules which use electrical current to deionize and polish reverse osmosis (RO) permeate water. The product water for the BloX20 modules is at an Ultrapure level required in today’s demanding applications.


  • Firstly, provide ultrapure water for industrial applications on a continuous basis using proven electrodeionization technology.
  • Secondly, nominal flow of 20 m3/h for each BloX results in the most compact footprint in industry.
  • Thirdly, modular design of the DeionX BloX is ideal to easily design an EDI system for practical unlimited flows by coupling several individual DeionX BloX.
  • Next, non-corrosive design by use of high quality (construction) plastics only.
  • Lastly, designed to minimize and simplify local installation.


  • Flow and pressure transmitters
  • Isolation valves
  • Automatic valves
  • Piping and frame material
  • Cleaning connections (CIP)
  • Instrumentation type and brand


  • Microelectronics Industry
  • Power Generation (NOx, Boiler Feed)
  • Food and Beverage
  • General Industry Electro Separation


BloX20 Specifications
Nominal flow 20 m³/h
Maximum flow 25 m³/h
Shipping weight, approx. 600 kg
Dimensions (w x h x d), approx. 100x138x69 cm
Piping Connections
Dilute in & out DN65 PP / PVC
Concentrate in & out DN20 PP / PVC
Electrode out DN15 PP / PVC
Standard connection is pipe. Other connections (flange, union) available on request
Typical Performance
Product Quality
Resistivity >16 MOhm·cm
Sodium < 3 ppb
Silica (SiO2) Removal Up to 99% or < 5 ppb
Boron Removal > 95 %
Operating Parameters
Recovery Up to 97 %
Voltage 0 to 400 VDC
Amperage 0 to 20.8 ADC
Inlet Pressure at nominal flow 3.1 to 6.9 bar
Pressure drop at nominal flow 1.4 to 2.8 bar
Actual performance may vary depending on site conditions. Consult DeionX to verify actual performance.
Maximum Feedwater Specifications
Feedwater – Total Exchangeable Anions (TEA as CaCO3) < 25 mg/l
Feedwater – Conductivity, NaHCO3 equivalent < 43 µS/cm
Temperature 5 to 40 ⁰C
Total hardness (as CaCO3) < 1.0 mg/l
Silica (SiO2) < 1.0 mg/l
Total Organic Carbon, TOC as C < 0.5 mg/l
Total Chlorine < 0.05 mg/l
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