Your Reliable EDI Unit Manufacturer & Supplier in China

  • Space-saving of approximately 30%.
  • Ensures high safety and environmental performance.
  • Can be customized to suit the application.
  • Stable supply of high purity water.
  • Cost-Effective, Reliable, and Energy saving.
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    NEWater: Your EDI Units Experts in China

    NEWater is committed to bringing new life to more water. Our electrodeionization unit water treatment plants can create a consistent supply of high-purity purified water at a low cost to you. 20 years of water treatment experience allows us to guarantee the quality of our products as well as your cost-effectiveness, high safety, environmental friendliness, and energy savings. Send us an inquiry now.

    NEWater Brings for YouReltaed Products

    EDI Purified Water System

    NEWater manufacture great standard Electrodeionization Unit equipment that can be redesigned for different types of industry.

    Purified Water System for Home

    Our EDI water treatment equipment ensures that the water is chemical-free, safe, and healthful to consume.

    RO EDI System

    RO EDI System is a combination of RO and Eletrodeionization technology that can produce approximately high purity water.

    RO EDI System

    We use a skid-mounted design that makes it easier to move and install.

    Whole House Reverse Osmosis System

    This advanced technology can generate continuously by electricity and chemical-free deionization.

    RO-EDI water system

    NEWater’s RO-EDI Water Systems are used to treat source waters producing high-purity water tailored to your specific requirements.

    EDI Water Purification System for Laboratory

    EDI water purification systems are chemical-free, effectively reduce TDS levels in the water, and produce high-quality water.

    EDI Membrane

    Our EDI membranes are cost-effective and have a life expectancy of up to three years.

    EDI Water Purification System for Laboratory

    NEWater strict the quality process to ensure the highest purity grade of water with low cost meets the lab requirements.

    Trusted NEWater EDI Units Manufacturer in China

    NEWater is a recognized electrodeionization water system manufacturer, and we are happy to provide our customers with modern EDI Units. Electrodeionization units are electrically powered water treatment devices that eliminate ions from water, such as salts and organic materials, giving you purified drinkable water. Our equipment is long-lasting and simple to maintain, and it is used in over 200 countries around the world.

    NEWater has been a leading water purification unit producer in China since 2001, servicing hundreds of customers in more than 100 countries. Our satisfied clients are proof of their trust in our quality and service. Through our team of professionals at NEWater, you can be assured of receiving a high-quality, efficient, and cost-effective EDI Unit.

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    Electrodeionization (EDI) Unit1

    NEWater Electrodeionization Units Basic Features

    • Units that are small, portable, and light.
    • Produces up to 18 M-cm of water.
    • It is low maintenance.
    • Environmentally Friendly. There’s no need for chemicals.
    • Monitoring-capable control unit.
    • Easy to use with no recirculation of concentrate.

    NEWater EDI Units Advantages

    • Space-Saver. Electrodeionization units are space-saving and compact in design.
    • Environmentally-Friendly. Utilizes chemical-free regeneration. As a result, regeneration downtime is reduced, and acid and lye storage and handling are avoided.
    • Designed to Last a Longer Time. EDI allows for a simple and seamless operation to run continuously or intermittently.
    • Cost-Effective. No expensive chemical upkeep and low maintenance.
    • Energy Efficient. This requires minimum energy to deliver reliable, ultra-pure water.
    • 100% Customizable. EDI units are designed with innovative technology to provide precise and customizable solutions.
    Electrodeionization (EDI) Unit2
    EDI Unit3


    • Electronics Industry.
    • USP Purified Water.
    • Laboratories.
    • Energy Production.
    • EDI Portable Exchange.
    • Cosmetics Industry.

    NEWater Mission:Bring New Life for Water

    NEWater has an independent large-scale production workshop, which is convenient for the control and supervision of product production quality. Strictly abide by production standards and provide detailed guarantees for all projects.

    Production workshop

    NEWater establishes SOP standardized operation process and strictly implements the work process. The professional project installation team, implement 5S on-site management. Equipped with standard safety facilities, investigating access conditions, and short construction time.

    Operation example

    The safe transportation process does not have to worry about product damage and extends the construction period. NEWater has provided system equipment to thousands of companies around the world, which guarantees absolute product transportation.

    Production and transportation 

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    seawater desalination data sheet

    Seawater Desalination System data sheet

    How Long does the General Production Cycle Need to Wait?

    NEWater’s treatment types of equipment are divided into a large system and a small system according to the water volume. The equipment is divided into portable water-making equipment, small modular equipment, skid-mounted equipment, and container-type equipment. According to different water volumes and customer requirements, we provide customized services.

    Conventional small equipment takes 3-7 days, and large equipment takes 2-3 months. This is based on your requirements and water volume.

    If I Need to Customize Equipment, What Data Need to be Provided?

    1. As the voltage and frequency of different countries are different, we first need the local voltage and frequency of electricity.
    2. How many gallons the water requirement per hour is
    3. The water quality of the source water and what requirements need to be met
    4. If you need to provide on-site installation services

    Does the Equipment Need to be Installed On-site?

    1. Portable and small equipment — This is plug and play, it doesn’t need to be provided installation services. According to our instructions, you can install by yourself.
    2. Small modular equipment, skid-mounted equipment, and container equipment-we will reserve the interface for docking. If there are installation workers, we will provide installation instructions and installation instructions. If necessary, we can also send someone to install it.
    3. How to provide installation instructions —— We have installation instructions and installation videos. If necessary, we can provide free remote software to help you with remote video installation instructions.

    How to Charge for Installation Service

    1. We provide free installation instructions, with instruction manuals and installation videos
    2. Remote video installation guidance. If it is a large piece of equipment and the customer needs to install it by himself, then we will also provide free remote installation guidance service, but we need to plan a good time, within our working hours. Our working hours are from 9 o’clock to 18 o’clock Beijing time
    3. We send workers to install it. This needs to be based on the size of the project. If we have been designated to install it in the early stage, the installation service abroad will belong to our scope of work, and no additional charge is required.
    4. If we need to send someone to install it temporarily, we need to provide different charges according to different countries, installation technical requirements, and different types of technical work. Welcome to inquire.

    How to Transport the Equipment?

    There are several types of transportation, sea, air, and express

    1. If it is a small device and requires fast speed, we can provide door-to-door service by air and express, the normal transportation cycle is 5-10 days.
    2. If it is skid-mounted or container equipment, it is more appropriate to use the shipping method. The normal transportation cycle is 20-40 days.

    Whats Your Payment Method?

    Small equipment needs payment to delivery

    For skid-mounted equipment and container equipment, 50% is prepaid, 30% is charged after video inspection, and 20% is charged before shipment.

    Of course, we provide you with flexible ways of cooperation. Become our agents, and have more flexible support. Welcome to contact us.

    Do You Provide Maintenance Services?


    1. NEWater provides free installation guidance and a one-year product warranty service. During the warranty service period, if there is an equipment problem, we provide free equipment repair or replacement services. If it is a manual operation, a fee will be charged. We can provide the required equipment replacement.
    2. We provide life-long after-sales service. NEWater has a full set of equipment and accessories, which can be replaced. Don’t worry about the failure of after-sales and maintenance.
    3. During the warranty period, NEWater provides all kinds of professional technical support, and if necessary. We also provide remote video guidance services.
    4. After the warranty period, NEWater also provides life-long after-sales maintenance, which requires a certain amount of manual service. There are also many matching accessories that can be replaced, so there is no need to worry about the later operation of the equipment.

    Do You Provide Design Services?

    Yes, we do.

    For conventional small equipment, NEWater has standardized equipment. For large-scale skid-mounted and container equipment, we can design a process that meets the needs according to different water quality requirements.

    At the same time, we carry out three-dimensional drawing designs according to different requirements and then communicate with customers to confirm.

    After the design confirmation is completed, we then proceed to custom processing. So you don’t have to worry about our design and production capacity. We will provide you with the most professional technical support.

    NEWater EDI Units

    NEWater EDI Units are designed to meet the most stringent water treatment standards. Our high-quality units continuously create ultra-pure water with a purity of 18.2 M/cm, resulting in lower operating costs, energy efficiency, and maintenance requirements, such as fewer facility demands and management oversight, which saves even more labor expenses. NEWater electrodeionization units are adjustable and created with cutting-edge 3D computer technology for precise and tailored results. Boiler feedwater at power stations, process water in the electronics sector, pharmaceutical industry, hospitals, and laboratories are typical EDI applications.

    NEWater guarantees that all our products are manufactured of high-quality materials are highly resistant to damage, are built to international standards with great care, and are guaranteed by a one-year warranty and lifetime maintenance. Our expert technicians assure that our equipment suits your needs while remaining functional and cost-effective.

    Please contact us at if you require a NEWater EDI Units.

    The Ultimate FAQ Guide for Electrodeionization (EDI) Units.

    Modern industries such as pharmaceuticals and microelectronics have sophisticated processes which necessitate water with exemplary purity levels. The quality of water used and discharged from these industries is stringently regulated hence necessitating ultra-modern water purification systems.

    Efforts to minimize environmental pollution have inspired the development of chemical-free water purifiers consequently shrinking the pollutant load. In the underlying article, we constrict our focus to one of the most advanced water purification technologies; electrodeionization and its respective range of equipment.

    Figure 1 Electrodeionization (EDI) unit.

    What is an EDI Unit?

    An electrodeionization (EDI) unit is an electrically-driven water deionization machine responsible for eliminating dissolved ions from water using ion exchange resins and membranes. The use of EDI units commenced in 1987 and, in 1998, EDI units were integrated with reverse osmosis. Their deionization capabilities are unrivaled and quite often, EDI units are exploited to generate ultra-pure water for industries like microelectronics, energy manufacturing, and pharmaceutical industries.

    Electrodeionization units exploit both ion exchange resins and ion exchange membranes to displace objectionable ions from water. As such, they are more effective compared to traditional water deionizer systems. Presently, EDI water systems are mainly used in tandem with reverse osmosis systems. This lowers the cost of production, elevates the quality of water generated, and protects the EDI system from premature fouling.

    Ordinarily, they are used to generate high-purity water for complex industrial applications. The quality of the resulting deionized water is attested to by its high resistivity (18.2MW/cm) and low conductivity. Regeneration in EDI units is electrically driven hence there are no chemicals used. This makes the purification process and equipment environmentally friendly, unlike typical water deionizers. We manufacture state-of-the-art EDI water units designed distinctively to gratify the requirements of different industries.

    How Do EDI Units Functions?

    Water electrodeionization units generate high-purity water by assimilating ion exchange and electrodialysis. Typical electrodeionization modules are made up of chambers holding ion exchange resins, which are alienated by ion-exchange membranes. EDI modules are in effect, the ion exchange bed. The feed water, which has been adequately pretreated to extract suspended solids is driven into the module and directed through the IX resins. Direct current from an external source is simultaneously fed through the anode and cathode electrodes.

    The subsequent voltage from the direct current provokes circulation in the ion exchange resins. This pulls the negatively charged ions towards the anode while the positively charged ions are attracted to the cathode. The objectionable ions’ bondage to the media is typically impermanent hence they are harvested as part of the concentrate stream. Subsequently, they are discarded into the drain or recycled.

    The pollutant ions in the feed water are ordinarily exchanged for hydrogen (H+) and hydroxide (OH-) ions as they penetrate through the ix resins as well as the ion exchange membranes. The outgoing water, which is essentially deionized water can be used instantaneously or treated further to elevate the purity levels.

    Exhausted EDI resins are regenerated electrochemically unlike conventional ion exchange resins, which are regenerated using acidic or basic regenerates. A regenerated EDI unit functions optimally and generates high-purity deionized water. Learn more about water electrodeionization by clicking the following link.


    Figure 2 Water electrodeionization process.

    What Are the Main Features of Electrodeionization Units?

    Electrodeionization water systems are primarily used to generate ultra-pure water for distinct industrial applications. They generate high-purity water by extracting impurity ions using electrodialysis and ion exchange technologies. Underneath, we are going to look at some of the primary features that distinguish EDI units from other water purification systems.

    • EDI units depend on ion-exchange membranes and resins to extract impurity ions hence they generate high purity water (up to 18 Megaohm-cm).
    • They are simply designed and compact, which allows them to efficiently utilize space.
    • They are electrically driven and hardly use any chemicals making them environmentally friendly.
    • Standard electrodeionization units have a capacity range of 500 to 2000 LPH. This diverse range accommodates the production demands of small, medium, and large-scale applications.
    • They are available in power supply options such as 50Hz/60Hz and 220V/380V.
    • Typical EDI units have a service flow rate ranging from 0.5 to 50 m3/hr.
    • Regeneration is electrically-driven and chemical regenerants are hardly used.
    • They have an average recovery rate ranging from 90% to 95%.

    What Are the Advantages of Integrating Reverse Osmosis with EDI Units?

    The assimilation of EDI water treatment systems and reverse osmosis systems as a water purification technique began in 1998. RO-EDI water systems are advanced ultrapure water systems used in complex fields such as pharmaceutical manufacturing and microelectronics. The RO-EDI water purification process commences by forcing water through semi-porous membranes in a process known as reverse osmosis.

    Reverse osmosis is a pressure-driven process that eliminates dissolved solids, minerals, organic compounds, bacteria, viruses, and nutrients from the water. The permeate drawn from the reverse osmosis system is subsequently used as the feed water for the EDI water system. Typically, one-pass or two-pass reverse osmosis is employed in the pre-treatment phase.

    Presently, you can procure an integrated RO-EDI water system, which is compact, more effective, and has a higher recovery than separate reverse osmosis and EDI water systems. Underneath, we walk through some of the rewards you can expect to reap from your RO-EDI water system.

    • Ultra-pure water with a resistivity of 18+ MΩ-cm using one-pass or two-pass reverse osmosis systems.
    • Higher flow rates in the EDI unit since there are no suspended solids or dissolved matter in the feed water.
    • Improved recovery rates (up to 95%) compared to separate RO and EDI units.
    • Lower maintenance costs and production costs.
    • Easy installation and lower installation costs.

    EDI unit1

    What Quality of Water do EDI Units Generate?

    Water electrodeionization systems typically produce first-rate deionized water. They extract practically all impurity ions in the water by swapping them with H+ and OH- ions. The purification grade of the deionized water however differs depending on the quality of feed water and the pretreatment technology deployed. For instance, using RO permeate from a double reverse osmosis system as the feed water for an EDI unit, guarantees ultra-pure water with resistivity levels of 18+ MΩ-cm.

    Ultrapure water is ordinarily categorized as Type I water. It is characterized by conductivity scores of <0.056 µS/cm, resistivity levels of 18+ MΩ-cm, TOC levels of <50 ppb, and extremely low TDS levels. This grade of water is mainly utilized in sophisticated processes such as cell culturing, HPLC, tissue culturing, and mass spectrometry. In the absence of an elaborate pretreatment unit, EDI units may generate Type II deionized water. This is purified water characterized by TOC scores of <50ppb, resistivity scores of < 1 MΩ-cm, and conductivity scores of <1 µS/cm.

    Type II deionized water suits applications such as media preparation, electrochemistry, and sample dilution. In addition, this grade of water can be used as feed water in a post-treatment system designed to generate ultrapure water. Regular and quality maintenance is mandatory in sustaining the generation of high-quality purified water.

    Figure 4 Industrial electrodeionization plant.

    Back to the guide ⇪

    Where Are Electrodeionization Units Mainly Applied?

    EDI water purification systems are presently exploited in practically all industries necessitating high-purity water. They are principally employed together with other water treatment systems but their role is mostly constrained to post-treatment. Their application fields cut across the following sectors; biotechnology, veterinary, energy, cosmetics, microelectronics, and pharmaceutical industries. However, we are going to narrow our focus to three principal industries:

    ● Pharmaceutical manufacturing.

    The majority of applications in pharmaceutical industries necessitate water with exceptional purity levels. Parameters such as TOC levels, TSS levels, microbial count, conductivity, and resistivity are strictly regulated by the respective pharmacopeias e.g. the European pharmacopeia (PhEur) and the USP. EDI systems custom-made for pharmaceutical water purification typically assimilate reverse osmosis systems. They are also designed to operate as sanitized hot water systems.

    ● Microelectronics.

    EDI units are popularly used to purify water for microelectronic industries. For instance, they are commonly exploited to generate high-purity water (at 18 MΩ-cm) for manufacturing semiconductors. They are often integrated with supplemental systems to ensure the desired silica, organic carbon, microbial content, and boron levels are attained.

    ● Energy production industries.

    Energy production industries are quite water-intensive. They necessitate high-grade water to cool high-pressure boilers and generate steam. As such, high-level water purification systems like electrodeionization units are needed. Previously, systems such as two-bed deionizers and mixed-bed deionizers were used but at present, most energy-producing industries prefer EDI units. This is because electrodeionization units can efficiently and economically generate high-purity water characterized by low silica levels and extremely low conductivity scores.

    Figure 5 Pharmaceutical RO/EDI water unit.

    Back to the guide ⇪

    What Quality of Feed Water is Needed by Electrodeionization (EDI) Units?

    Although EDI units can sufficiently treat feedwater drawn from varying sources (brackish water, tap water, groundwater, surface water, or seawater), pretreatment is often obligated to condition the feed water. Preconditioning the feed water decreases the likelihood of premature fouling and also elevates the quality of purified water generated. Here are numerous pretreatment systems that can be used to condition electrodeionization feed water.

    ● Reverse osmosis systems.

    Reverse osmosis systems are frequently used to supplement EDI units in varying applications necessitating ultrapure water. As a matter of fact, we manufacture varying RO-EDI water systems for industrial and commercial applications. RO pretreatment systems shrink the TDS levels and extract varying microbial pollutants. In addition to elevating the quality of purified water produced, they shrink the production costs and prolong the electrodeionization unit’s life expectancy.

    ● Water softeners.

    Water softener systems are mainly called upon when purifying moderately or extremely hard water. They expel minerals responsible for water hardness (calcium and magnesium) thereby decreasing the chances of scale accumulation. The most coveted water softeners are ion exchanger water softeners. They utilize the cation exchange filter to expel hardness ions, consequently swapping them with sodium (Na+) or potassium (K+) ions.

    ● Sediment filters.

    The build-up of suspended solids on the ion exchange resins and membranes can lead to clogging, which can consequently lead to deteriorated flow rates and low-quality deionized water. This is often mitigated by employing sediment filters before the electrodeionization process. They seize colloidal particles, dust, microplastics, and virtually all floating solids. They also decrease the feed water’s turbidity.

    Back to the guide ⇪

    What is the Difference Between Electrodeionization Units and Water Deionizers?

    Water deionizer systems are purification units that expel impurity ions from water using ion-exchange resins. EDI units also expel dissolved ions but they utilize ion exchange resins as well as ion-exchange membranes. Additionally, electrodeionization units are dependent on direct current whereas water deionizers are driven by chemical regenerants. Conventional deionizers are recharged with acidic regenerants (the cationic resins) and basic regenerants (the anionic resins). EDI units regenerate automatically using direct current.

    The integration of ion exchange resins and membranes in EDI water systems makes them more effective than traditional deionizers. Water deionizer systems typically produce Type II deionized water while EDI units can generate ultra-pure water (at 18+ MΩ-cm). Electrodeionization water systems have recently been used to post-treat deionized water from dual-bed deionizers. The reliance on chemical regenerants by water deionizers can contribute to environmental pollution. On the contrary, electrodeionization units do not use chemicals and therefore do not discharge toxic waste into the environment.

    Figure 6 Water deionizer system.

    Back to the guide ⇪

    Do EDI Units Extract Carbon Dioxide (CO2)?

    Yes. Ordinarily, carbon dioxide ionizes when it is in water. This makes it difficult to gauge its concentration using conductivity parameters and most water purification systems are incapable of eradicating CO2. This includes reverse osmosis systems. EDI water systems are however capable of extracting CO2 among other objectionable gasses from water.

    Carbon dioxide and bicarbonate are eliminated through electrodeionization after easy ions such as sodium and calcium have been eliminated. Other objectionable elements that are considered difficult to eradicate but are removable by electrodeionization systems include boron, silica, and ammonia.

    Back to the guide ⇪

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