The IONPURE VNX-EP series is a large-flow continuous electrodeionization(CEDI)module for ultrapure water systems,available in VNX55-EP(12.5 m³/h)and VNX28-EP(6.2 m³/h)nominal flow rates.Designed for power industry supercritical boilers and high-purity water applications,it delivers>17 MΩ·cm resistivity and>95%silica and boron removal.Systems achieve>228 m³/h per train with multiple modules in parallel.
What Is a Continuous Electrodeionization(CEDI)Module?
A CEDI module is a water purification device that combines ion exchange membranes,ion exchange resins,and a direct current electric field to continuously remove ionized and ionizable species from reverse osmosis(RO)permeate,producing high-purity water without chemical regeneration.Large-flow modules serve ultrapure water systems requiring outputs from tens to hundreds of cubic meters per hour,often in power generation and semiconductor fabrication.
The IONPURE VNX-EP series belongs to the category of high-flow CEDI stacks adopting patented Flexmount end-connector design.It targets ultrapure water production where chemical-free operation,high recovery,and sub-ppb level ion removal are mandatory for supercritical boiler feed and other critical applications.
Key Specifications
Nominal Product Flow Rate,VNX55-EP:12.5 m³/h(55 gpm)
Nominal Product Flow Rate,VNX28-EP:6.2 m³/h(27.5 gpm)
Product Water Resistivity:>17 MΩ·cm(at 25°C)
Silica Removal:>95%
Boron Removal:>95%
Sodium and Chloride Removal:≥99.8%
Typical Recovery Rate:90–95%
Operating Voltage Range:0–300 VDC
Required Feed Water Conductivity(RO permeate):<40µS/cm
Feed Water Temperature:5–45°C
Feed Water Pressure:1.4–7 bar
Maximum Feed Water Hardness:1.0 ppm(as CaCO3)
Maximum Feed Silica:1.0 ppm
Maximum Feed Chlorine Residual:<0.02 ppm
Maximum Ambient Temperature:≤45°C,indoor installation,avoid direct sunlight
Module Dimensions(VNX55-EP):50.8 cm×50.8 cm×213.3 cm(W×D×H)
Module Dimensions(VNX28-EP):50.8 cm×50.8 cm×111.8 cm(W×D×H)
Certifications:CE,ISO 9001,ISO 14000,Halal food processing compliant
Technical Highlights
Patented Flexmount end-connector minimizes system cost and simplifies design.The integrated connector doubles as a module support bracket,eliminating the need for separate structural framing and reducing installation labor for large skid-mounted electrodeionization systems.
Chemical-free continuous operation eliminates regenerant handling.The CEDI process regenerates resin media electrically,removing the requirement for acid,caustic,neutralization tanks,or bulk chemical deliveries.This addresses a frequent pre-purchase concern:does the system need onsite chemical storage?It does not.
Through-port gasket sealing ensures leak-free flow distribution.The design incorporates full-bore gasket seals between cells,preventing internal and external brine leakage common in O-ring sealed stacks.The module is shipped with factory-installed connections and an integral terminal box,reducing field wiring time.
Achieves 90–95%water recovery with minimal concentrate bleed.High recovery concentrates impurities in a small reject stream,lowering pretreatment and RO feed water demand.The reject can be recycled in some RO/CEDI configurations,further improving overall system efficiency.
Two standardized flow rates enable flexible system sizing.Users select VNX55-EP for 12.5 m³/h or VNX28-EP for 6.2 m³/h per module.Parallel configurations allow single-train output to exceed 228 m³/h(1,000 gpm),meeting the scale of supercritical power plants without requiring custom-designed stacks.
Applications
Supercritical boiler makeup water:Delivers>17 MΩ·cm ultrapure water with sub-ppb sodium,chloride,and sulfate levels.A parallel array of VNX-EP modules meets feed flow rates exceeding 228 m³/h per train,enabling full-load boiler supply without chemical regenerant cycles.
Semiconductor ultrapure water loops:Provides low-TOC,high-resistivity polishing after RO/UV for wafer rinse processes.The boron removal rate exceeding 95%supports the strict boron limits in electronics-grade water specifications.
Pharmaceutical purified and highly purified water systems:Production of compendial purified water without the microbial and chemical risks associated with mixed-bed ion exchange.The elimination of acid/caustic handling supports cleanroom cGMP compliance.
Power plant condensate polishing:Used as a downstream CEDI polishing step after RO treatment of turbine condensate return water,achieving>99.8%sodium and chloride removal for high-pressure boiler protection.
Hydrogen production water treatment:Supplies ultrapure water for PEM electrolyzer feeds,where low ion concentration protects membrane longevity.The continuous operation mode matches hydrogen plant 24/7 duty cycles.
High-purity process water for coatings and chemical blending:Produces consistent water quality for sensitive batch formulations without the quality drift seen in exhausted mixed-bed resin tanks.
Selection Guidance
Suitable applications:
Ultrapure water systems targeting>17 MΩ·cm resistivity with a feed conductivity below 40µS/cm and low hardness(≤1.0 ppm as CaCO3)
Large flow-rate trains that benefit from module replication—any capacity from 6.2 m³/h to over 228 m³/h with no system redesign
Indoor environments with ambient temperature≤45°C where chemical-free operation is desired for safety or regulatory reasons
Not recommended for:
Feed water with hardness exceeding 1.0 ppm(as CaCO3)without an upstream softener.The module internals can scale,reducing stack life.When water hardness cannot be reduced,a hot water sanitisable reverse osmosis system with chemical polishing may be more appropriate.
Outdoor or sub-freezing installations without an enclosure—the module requires protection from direct sunlight and temperatures within 5–45°C.For outdoor membrane systems,a containerized CEDI package with HVAC should be considered.
Applications with variable flow below 50%of nominal flow rate for extended periods.Turndown below design minimum can create localized ionic depletion and affect long-term resin performance.In such cases,smaller VNX28-EP modules or staged banks with individual isolation are preferred.
FAQ
1.How much does an IONPURE VNX55-EP or VNX28-EP cost?
The VNX55-EP module typically ranges from 55,000to75,000 USD,and the VNX28-EP from28,000to38,000 USD,depending on configuration and order quantity.Prices fluctuate due to exchange rates,tariffs,and factory adjustments.For an accurate quotation,contact Beijing Zhongping Technology directly with delivery and project details.
2.What is the typical lead time for VNX-EP modules?
Standard ex-factory lead time is 10 to 14 weeks.In periods of high demand,we expedite shipment where possible.Beijing Zhongping Technology maintains advance stock for regular clients,which can shorten delivery to 4–6 weeks for standard configurations.
3.What are the dimensions and shipping weight of the VNX55-EP and VNX28-EP?
The VNX55-EP measures 50.8 cm×50.8 cm×213.3 cm and the VNX28-EP measures 50.8 cm×50.8 cm×111.8 cm(width×depth×height).Exact crate dimensions and shipping weight vary with protective packaging;we provide vessel loading plans upon order confirmation to support freight planning.
4.Is the VNX-EP module in stock or made to order?
These modules are manufactured to order due to customization of cell pairs and the need for factory quality testing.For urgent project timelines,Beijing Zhongping Technology can allocate from reserved production slots or locate distributor stock.We confirm availability within one business day of receiving a project inquiry.
5.How do I choose between the VNX55-EP and VNX28-EP for my ultrapure water system?
Select the VNX55-EP for base load systems requiring 12.5 m³/h per module,and the VNX28-EP for smaller trains or turndown capacity at 6.2 m³/h per module.System design considers parallel combinations to match required flow rate.We provide sizing calculations and process flow diagrams as part of the pre-sales service at no additional charge.
6.What certifications do these electrodeionization systems have?
The modules carry CE marking,are produced under ISO 9001 and ISO 14000 certified quality and environmental management systems,and are certified for Halal food processing applications.Every module undergoes factory acceptance testing with water quality verification before shipment.
7.What are the feed water quality requirements for the CEDI module?
The module requires RO permeate with conductivity<40µS/cm,temperature 5–45°C,pressure 1.4–7 bar,hardness<1.0 ppm as CaCO3,silica<1.0 ppm,and chlorine residual<0.02 ppm.Operating outside these limits accelerates scaling or oxidation damage.We supply a detailed feed water specification sheet during proposal preparation.
8.Does the module require a separate power supply and control system?
Yes,each module needs a regulated DC power supply delivering 0–300 VDC with current limiting.A control system monitors voltage,resistivity,and flow interlocks.Beijing Zhongping Technology offers pre-engineered CEDI skid packages that integrate power,controls,and instrumentation with the modules as a turnkey solution.
9.What payment terms and shipping methods do you accept for international orders?
We accept wire transfer(T/T)and letters of credit.Shipments are dispatched FCA or CIF per Incoterms.Beijing Zhongping Technology generates commercial invoices and packing lists required for customs clearance.Bulk sea freight and air freight options are available depending on delivery urgency and destination country.
10.Do you provide installation supervision or commissioning support?
We provide optional installation supervision and onsite commissioning by factory-trained engineers.This service is scoped per project and includes start-up verification,resistivity performance tuning,and operator training.Beijing Zhongping Technology coordinates with local EPC contractors to align with construction milestones.
FAQ
1.Who are We?
Beijing Zhongping Technology Co., LTD., is a global industrial electrical automation service provider, is a scientific research, design, marketing, technical services, industrial Internet, international import and export services as one of the science and technology companies.
2.What can you buy from us?
PLC, inverter, human-machine interface, hydraulic products, low-voltage power distribution, industrial robots and core components
3.Is the item in stock or need to be purchased from another supplier?
We have a large inventory of goods and have our own warehouse.
4.What advantages do we have over other suppliers?
Our company has a large amount of inventory and a number of warehouses, but also in the country's important industrial provinces and cities with offices and a number of overseas service points. To provide you with intelligent manufacturing one-stop comprehensive services, save efforts, labor and cost.
5.Can you provide 100% new original authentic products?
We only sell new original genuine, no renovation, no fake, only for the original factory original!
6.How long is the delivery time?
If there is a stock, it will take 2-3 working days to ship, if the quantity is large, it will take 5-7 working days after receiving the payment, if it is not a conventional model, it will take some time, we will inform you of the specific delivery time.
7.Is there technical support available?
Of course, we have a professional technical team that can help you solve technical problems.
8.How do we guarantee quality?
We have three processes to control the quality of goods.
1) Our engineers will inspect the production and quality control in the factory regularly.
2) Incoming materials shall be inspected by experienced purchasing engineers before they can be stored.
3) At least 2 people in the logistics department cross-check the goods to be sent before delivery.
9.Can you guarantee the safe and reliable delivery of your products?
Yes, we strictly adopt the international standard packing. We also use special packaging for dangerous goods, and refrigerated shipping for items with temperature requirements. Special item packaging and general cargo standard packaging requirements may incur additional costs.
10.How about the freight?
The cost depends on how you choose to get the goods. Express is usually the fastest but also the most expensive way. Sea freight is the best solution for large quantities of goods. The exact shipping cost depends on the purchase amount、quantity and weight of your order. Please feel free to contact us for more information.
+86 010-64225983
+8613811814778
info@zhongpingtech.com
Building 26, Liyuan Community, Chaoyang District, Beijing, China
