EDI Systems
Series EDI

  • For DI water with Resistivity > 1 MΩ·cm or Conductivity <1 µS/cm 
  • Capacity of 1- 75 m³/hr
  • No regenerant required for regeneration, which saves much expense.
  • Less fouling design, Concentrate and electrolyte stream are flowing into EDI in opposite directions 
    to feed water can avoid fouling effectively.
  • Low energy consumption
  • Control panel with LCD screen
  • Pressure gauges
  • Flow meters
  • Resistivity meter
  • Factory tested to insure quality
  • 1 Year warranty

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Electrodeionization (EDI) system

     EDI is a process which combines semi-impermeable membrane technology with ionexchange media to provide a high efficiency demineralization water.

     The EDI process produces industrial process water of very high purity, using less than 95% of the chemical products used in the conventional ion exchange processes.

     With EDI system membranes and electricity replace the million gallons of acid and caustic chemicals that the old processes required daily.


EDI-moduleEDI working

     An EDI Module consists of a series of thin chambers that alternately contain mixed bed resin for water purification and a concentrate water flow to carry away impurities. Ion-specific membranes, cationic on one side and anionic on the other, separate the chambers.

     A cationic-specific membrane will only allow positively charged ions to pass, while blocking the passage of negatively charge ions. An anionic-specific membrane does just the reverse. Neither membrane will allow water to pass.

     High voltage DC Electrodes are located on either side of the sandwiched resin/concentrate chambers. There can be from 4 to 100 resin chambers in an EDI cell, depending on the manufacturer.

     As water begins to flow through the cell, the charged ions in the water in a resin chamber are captured by the ion exchange resin. When a voltage is applied (200-400 VDC) across the cell, the captured cationic (+) and anionic (-) impurities begin to migrate across the resin bed in the direction of the appropriate electrode. The ions them pass through the ion-specific membranes into the concentrate chamber. The ions are kept in the concentrate chamber by the reverse charged membrane on the adjacent resin chamber, thus trapping them in the concentrate stream.


EDI-ModuleEDI Module

  • No regenerant required for regeneration
    EDI does not consume regenerant and recycle the concentrate in operation, which saves much expense and makes the system much simpler.
  • Less fouling design
    Concentrate and electrolyte stream are flowing into EDI in opposite directions to feed water can avoid fouling effectively. Then it broadens the feed water limit adequately.
  • Low energy consumption
    EDI filled with resin reduces the EDI module resistivity significantly, which reduces the energy consumption largely.


EDI Module Specification
Module 1000S 2000S 3600S 4500S 5800S
voltage (V) 12-100 50-120 0.25 1.5 0.25
current (A) 0.5-5.5 0.5-5.5 0.5-5.5 0.5-5.5 0.5-5.5
Product Flow (m³/hr) 1.0 2.0 3.0 4.0 5.0
Conc. flow (m³/hr) 0.15 0.2 0.3 0.45 0.65
Electrolyte flow (m³/hr) 0.06 0.06 0.06 0.06 0.06


 Orodering information


 EDI Module 

 EDI Module 

 EDI-01 1 CP-1000S 1
 EDI-02 2 CP-2000S 1
 EDI-03 3 CP-3600S 1
 EDI-04 4 CP-4500S 1
 EDI-05 5 CP-5800S 1
 EDI-10 10 CP-5800S 2
 EDI-15 15 CP-5800S 3
 EDI-20 20 CP-5800S 4
 EDI-25 25 CP-5800S 5
 EDI-30 30 CP-5800S 6
 EDI-35 35 CP-5800S 7
 EDI-40 40 CP-5800S 8
 EDI-45 45 CP-5800S 9
 EDI-50 50 CP-5800S 10
 EDI-75 75 CP-5800S 15