Pure Water EDI Module

Continuous Deionization | Chemical-Free | High-Purity Output

The Pure Water EDI Module is a core component used in RO + EDI ultrapure water systems to continuously remove dissolved ions from RO permeate water. By combining ion exchange membranes, ion exchange resins, and direct current, the EDI module produces high-resistivity ultrapure water without the need for chemical regeneration.

It is widely used in pharmaceutical, electronics, power generation, laboratory, and industrial ultrapure water systems.

Working Principle

The EDI module uses an electric field to drive ions through selective ion exchange membranes, continuously removing cations and anions from water. The concentrated ions are discharged through a separate stream, allowing continuous deionization and stable ultrapure water production.

Key Advantages

  • Continuous operation without acid or alkali regeneration

  • Stable ultrapure water quality

  • Environmentally friendly, no chemical discharge

  • Compact design and easy integration

  • Low operating and maintenance cost

  • Long service life

Technical Specifications (Reference)

  • Feed water: RO permeate

  • Product water resistivity: ≥15–18.2 MΩ·cm

  • Conductivity: ≤0.1 μS/cm

  • Silica: ≤20 ppb

  • Operating voltage: DC power supply

  • Operating temperature: 5–35°C

  • Operating pressure: 0.2–0.6 MPa

Feed Water Requirements

  • RO permeate conductivity: ≤20 μS/cm

  • Hardness: ≤1 ppm (as CaCO₃)

  • Free chlorine: ≤0.02 ppm

  • SDI: ≤3

Application Areas

  • RO + EDI ultrapure water systems

  • Pharmaceutical water production

  • Electronics and semiconductor manufacturing

  • Power plant boiler makeup water

  • Laboratory and research water systems

Why Choose Our EDI Modules

  • Stable performance and high ion removal efficiency

  • Compatible with major RO systems

  • OEM & ODM service available

  • Factory direct supply with competitive pricing

  • Technical support for system integration