EDI / CEDI Systems
The Ionpure line uses continuous electrodeionization (CEDI) technology to produce high-purity and ultrapure water continuously, without acid/caustic chemical regeneration cycles. Unlike complex resin beds, it produces no wastewater, creates no chemical hazard, and delivers consistently stable water quality up to 18.2 MΩ·cm resistivity (0.055 µS/cm conductivity).
Ionpure Model Comparison
Ionpure VNX Series (VNX55 / VNX-Max / VNX-Mini / VNX-Ultra)
High-flow (5.7–22.7 m³/h) CEDI modules for power generation, boiler feedwater, and microelectronics. Silica and boron removal exceeds 95% on the VNX-Max/Mini and reaches ≥99.8% on the VNX-Ultra.
Capacity: 5.7 – 22.7 m³/h (25 – 100 gpm)
Ionpure LX-HI (Hot Water Sanitizable)
Instant sanitization with 85°C hot water (~1.5 hours) for the pharmaceutical, biotech, and medical sectors. Compliant with USP, Ph.Eur, and cGMP.
Capacity: 0.22 – 7.67 m³/h (1 – 33.8 gpm)
Ionpure LX-X & LX-Z Industrial Series
Plate-and-frame configuration CEDI modules for food & beverage, chemical, power, and general industrial pure water applications.
Capacity: 0.22 – 10 m³/h (1 – 44 gpm)
Ionpure MX Series (MX30 – MX500)
Laboratory and cabinet-type modules with 'all-filled' concentrate compartments that require no recirculation pump or brine (salt) injection.
Capacity: 30 – 500 L/h (0.13 – 2.2 gpm)
Ionpure DC3 Three-Phase Power Supply
High-efficiency switch-mode power unit (0–600 VDC, 0–15 A DC output; 45 A when 3 units are combined in parallel). SCADA/PLC integration via a Modbus TCP/IP Ethernet port.
Capacity: 0–600 VDC / 0–15 A DC (parallel: 45 A)
Ionpure DCR & G4 Digital Controller
Single-phase DIN-rail DCR rectifier, and the new-generation G4 controller with electrical resistance logging and early fault diagnosis.
Capacity: 24–600 VAC Input / 5 Current Steps
1. VNX Series — High-Volume Industrial and Microelectronics Modules
High-flow (5.7–22.7 m³/h) CEDI modules for power generation, boiler feedwater, and semiconductor applications. A single VNX module delivers the flow of multiple conventional modules, reducing piping cost and footprint by 50%; silica and boron removal exceeds 95% on the VNX-Max/Mini and reaches ≥99.8% on the VNX-Ultra.
- VNX55-EP / VNX55-EX: 11–15 m³/h (50–66 gpm) nominal flow; high silica (>98%) and sodium removal for boiler feedwater and turbine protection in power generation plants.
- VNX55 platform: VNX-E (high recovery), VNX-EP (Enhanced Performance), VNX-EX (high performance), VNX-HH (high hardness), and VNX-ULTRA variants; 12.5 m³/h (55 gpm) nominal.
- VNX-Mini: 12.0 m³/h (52.8 gpm) nominal, 17.9 m³/h (79.2 gpm) maximum flow; a compact body for high-flow systems with a smaller footprint.
- VNX-Max: the highest per-module flow CEDI module, with 15.0 m³/h (66 gpm) nominal and 22.7 m³/h (100 gpm) maximum flow.
- VNX-Ultra: guarantees reduction of boron (B), silica (SiO₂), and trace ions — critical for semiconductor and microelectronics manufacturing — to ultra-low ppb levels.
- VNX-CDIT: a special membrane structure providing scaling resistance in high-hardness-tolerant feedwater loaded with CO₂ and hardness.
2. LX Series — Mid-Size Industrial and Pharmaceutical Modules
Ionpure LX series modules are identified by the LXM naming system, offering six capacity steps: LXM04, LXM10, LXM18, LXM24, LXM30, and LXM45. The series code appended at the end indicates the module type (e.g., LXM10HI-3 = module 10 in the HI series, LXM10X = the same capacity in the X series).
- LX-HI (Hot Water Sanitizable): can be directly sanitized with 185°F (85°C) hot water for microbial control in the pharmaceutical, biotech, and medical sectors; full sanitization completes in approximately 1.5 hours, versus roughly 3 hours of downtime for standard modules that require staged heating. LX-HI modules are also rated for continuous operation up to 140°F (60°C), eliminating the need for a chemical sanitization cycle. They withstand more than 150 sanitization cycles. Fully compliant with USP, Ph.Eur, and cGMP standards; wetted materials comply with FDA 21 CFR 173/177, NSF 51, NSF 61, and EU 2002/72/EC and 89/109/EEC. Models: LXM04HI-3, LXM10HI-3, LXM18HI-3, LXM24HI-3, LXM30HI-3, LXM45HI-3.
- LX-X & LX-EU: a reliable industrial CEDI module used for polishing RO permeate in the food & beverage, chemical, general electronics, and power sectors. Models: LXM04X, LXM10X, LXM18X, LXM24X, LXM30X, LXM45X. Certifications: NSF 14 and NSF 61 for LX-X; FDA 21 CFR 177, NSF 51, NSF 61, and EU 2002/72/EC, 2003/11/EC and 89/109/EEC for LX-EU.
- LX-Z: economical, continuous pure water production for industrial treatment and demineralized water lines (0.22 – 10 m³/h; up to 10 m³/h per module with the largest model, the LX8000Z); tolerates up to 0.05 ppm chlorine in the feedwater.
3. MX Series — Laboratory and Compact Cabinet-Type Modules
Nominal flow of 30 to 500 L/h. Ideal for laboratory, hospital sterilization, and cabinet-type systems thanks to patented "all-filled" concentrate compartments that require no recirculation pump or brine injection.
- Models: MX30 (30 L/h), MX60 (60 L/h), MX125 (125 L/h), MX250 (250 L/h), and MX500 (500 L/h).
- All-Filled Concentrate Compartment: thanks to patented resin-filled concentrate compartments, no separate concentrate recirculation pump or brine injection system is required.
- Reliability: absolute sealing with a dual O-ring gasket system; 75 psi (5 bar) operating pressure, continuous operation up to 45°C, a high 90–95% recovery rate and 90–99% silica removal.
- Electrical requirement: maximum 200/400/600 VDC and 2.5 A DC per module.
4. Smart DC Power Supplies and Digital Controllers
- Ionpure DC3: a three-phase (380–480 VAC), high-efficiency switch-mode power unit. Delivers 0–600 VDC and 0–15 A DC per module. Up to 3 units can be combined with a parallel connection card to reach 45 A DC. Connects directly to SCADA and PLC systems via a Modbus TCP/IP Ethernet port.
- Ionpure DCR: a compact single-phase (24–600 VAC, 45–65 Hz) rectifier with output up to 600 VDC. Offers 5 current-step options (0–2.5 A / 0–4.0 A / 0–6.5 A / 0–10.0 A / 0–15 A) and Modbus RTU / 4–20 mA output. Available as a DIN-rail-mounted model (DCR-M) or an analog retrofit model (DCR-R2) that replaces older G2 units.
- Ionpure G4 Controller: the newest-generation digital single-phase controller. Continuously logs the CEDI modules' real-time electrical resistance, providing early-warning fault diagnosis when fouling or scaling begins on the membrane surface. Fully compatible with DSP1/DSP8 displays.
Module and Power Supply Families
The Ionpure product line is detailed on separate pages by module family and power supply:
- LX Series CEDI Modules — LX-Z, LX-X, LX-EU, LX-HI variants
- MX Series CEDI Modules — MX30 to MX500
- VNX Series CEDI Modules — VNX-Max / VNX-Mini, integrated DC3+ power supply
- Power Supplies — DC3, DCR, and the new-generation G4 controller
Why Ionpure CEDI?
- No acid or caustic storage required — unlike conventional mixed-bed resin systems, no chemical regeneration is needed
- Continuous production with no batch regeneration downtime and no chemical wastewater discharge
- Water quality up to 18.2 MΩ·cm resistivity (0.055 µS/cm conductivity)
- LX-HI series: instant 85°C hot-water sanitization (~1.5 hours), compliant with USP, Ph.Eur, and cGMP standards
- Typical CEDI module service life of 5–10 years under suitable feedwater conditions
Frequently Asked Questions About Ionpure EDI / CEDI Systems
Technical answers on CEDI operating principles, feedwater requirements, hot water sanitization, and power supply selection.
What is EDI (electrodeionization)?
EDI (or CEDI — Continuous Electrodeionization) is a treatment technology that continuously removes dissolved ions from water using a DC electric current applied across ion-exchange resins and ion-selective membranes. Unlike conventional mixed-bed resin beds, it requires no chemical (acid/caustic) regeneration and operates continuously.
What is the difference between EDI and a mixed-bed resin system?
Mixed-bed systems are periodically regenerated with HCl and NaOH; production stops during regeneration and chemical wastewater is generated. EDI modules, by contrast, regenerate the resin in place using a continuous electric current — no chemicals are used, no wastewater is produced, and production is uninterrupted.
What is the service life of a CEDI module?
Under suitable feedwater conditions, Ionpure CEDI modules typically operate continuously for 5–10 years. The main factors affecting module life are the hardness, silica, and organic load in the feedwater.
What are the feedwater requirements for CEDI?
It must be fed from RO permeate. Typical feedwater quality: conductivity <40 µS/cm, hardness <1 ppm CaCO₃, CO₂ <10 ppm, TOC <0.5 ppm, temperature 5–45°C (for the LX-X and LX-Z series). The LX-HI series has an operating temperature range of 5–60°C.
How does hot water sanitization work?
Ionpure LX-HI series modules can be sanitized directly with 185°F (85°C) hot water. Sanitization takes approximately 1.5 hours; for standard modules requiring staged heating, this takes approximately 3 hours. LX-HI modules withstand more than 150 sanitization cycles. Microbial control is achieved without the need for chemical sanitization.
Which series suits which application?
The VNX series (5.7–22.7 m³/h) is designed for high-volume applications such as power generation and microelectronics; the LX-HI series for applications requiring hot water sanitization, such as pharmaceutical and biotech; the LX-X (0.22–7.67 m³/h) and LX-Z (0.22–10 m³/h) series for general industrial and food & beverage applications; and the MX series (30–500 L/h) for laboratory and compact cabinet-type systems.
How do you choose a power supply?
It's selected based on the number of modules and current requirements. The DC3 (three-phase, 0–600 VDC, 0–15 A) is suited to large module groups and can be raised to 45 A by combining 3 units with a parallel connection card. The DCR (single-phase, 5 current steps from 0–2.5 A to 0–15 A) is for single-module or retrofit applications. The G4 controller, meanwhile, provides early fault diagnosis through electrical resistance logging.
Request EDI System Engineering and Quote
Our team will size the right Ionpure module for your flow rate and GMP requirements.