Ionpure VNX55-HH is an electrodeionization system engineered as a water polishing system for high-hardness feed water,accepting up to 2 ppm hardness as CaCO₃without upstream softening.Rated at 10 m³/h(44 gpm)nominal flow,it delivers>16 MΩ·cm product resistivity with 80–90%water recovery,eliminating acid and caustic regeneration.Designed for power plant boiler makeup and industrial process water.
What Is an Electrodeionization System for Water Polishing?
An electrodeionization system uses a DC electric field,ion-exchange membranes,and mixed-bed resin to continuously remove dissolved ions from reverse osmosis permeate.It functions as a water polishing step that replaces chemically regenerated mixed-bed deionizers,producing high-purity water without hazardous handling.
Within CEDI technology,standard modules require softened or very low-hardness feed to prevent scale fouling.The VNX55-HH is a specialized high-hardness-tolerant CEDI module,optimized internally to operate reliably on single-pass RO permeate containing up to 2 ppm total hardness(as CaCO₃).This makes it a direct-fit water polishing solution for power generation and industrial steam users where feed water hardness exceeds typical CEDI limits.
Key Specifications
Nominal Product Flow:10 m³/h(44 gpm)
Product Water Resistivity:>16 MΩ·cm
Hardness Tolerance(as CaCO₃):≤2.0 ppm
Feed Water Conductivity:<40µS/cm
Feed Water Temperature Range:5–45°C(41–113°F)
Feed Water Pressure Range:1.4–7 bar(20–100 psi)
Free Residual Chlorine Tolerance:<0.02 ppm(as Cl₂)
Feed Water Silica(SiO₂):<1.0 ppm
Water Recovery:80–90%
Operating Voltage Range:0–600 VDC
Operating Current Range:2.0–13.2 A
Silica(SiO₂)Removal:>90%
Module Dimensions(Diameter×Length):44.45 cm×213.3 cm(17.5 in×84 in)
Maximum Ambient Temperature:45°C(113°F)
Connection Type:50 mm butt-weld polypropylene(PP)flange connections
Certifications:CE Marked,ISO 9001:2015 and ISO 14001:2015 manufacturer facility certifications,Halal certified
Sealing Technology:Through-port gasket design
Technical Highlights
Hardness-tolerant internal design accepts up to 2 ppm feed hardness without softening.A common question from plant engineers is whether single-pass RO permeate can feed a CEDI module directly when hardness approaches 2 ppm—the VNX55-HH is specifically engineered for this condition.The resin,membranes,and flow channel geometry are optimized to prevent scale precipitation from calcium and magnesium,eliminating the capital cost and chemical consumption of an upstream softener.
Chemical-free continuous regeneration eliminates acid and caustic handling.The electrodeionization system regenerates its resin electrochemically during normal operation.No bulk chemical storage,neutralization tanks,or resin replacement programs are required,dramatically reducing plant safety risk and manual labor.
80–90%water recovery reduces feed water and waste volumes.By recirculating the concentrate stream,the VNX55-HH sends only 10–20%of the feed flow to reject.For a 10 m³/h module,this means 1–2 m³/h of wastewater,offering significant savings compared to conventional ion exchange regeneration cycles that generate large chemical waste batches.
Through-port gasket sealing prevents cross-compartment leakage.Multiple concentration compartments use double O-ring and through-port gasket sealing,maintaining stable product water quality over years of operation.This design avoids internal leaks that can cause resistivity dips in multi-compartment modules.
Pre-wired junction box speeds field installation.A factory-installed junction box with labeled power leads arrives on each module,simplifying the electrical connection to the DC power supply and reducing commissioning time.
Applications
High-pressure boiler feed water makeup in power plants:Produces>16 MΩ·cm makeup water for 60 to 180 bar drum boilers.Operating on single-pass RO permeate with up to 2 ppm hardness,the VNX55-HH eliminates the softener,providing a compact water polishing system that reduces demineralization plant footprint and chemical handling.
Industrial steam generation and cogeneration facilities:Supplies silica-free,low-conductivity water to package boilers and heat recovery steam generators.Silica removal>90%prevents vapor-phase silica carryover and turbine blade deposits.
Petrochemical and refinery process water:Delivers high-purity water for catalyst makeup,scrubber feed,and process dilution without the need for acid/caustic regenerant systems in classified areas.
Combined-cycle power plant water treatment:Integrates with multi-stage RO pretreatment to provide continuous polished water for both NOx control and steam cycle makeup from a common water polishing system.
Replacement of aging mixed-bed polishers:Upgrades existing deionization trains to a chemical-free electrodeionization system,using the existing RO permeate line and reducing operator exposure to sulfuric acid and sodium hydroxide.
Selection Guidance
Suitable applications:
Feed water total hardness consistently between 0.1 and 2.0 ppm as CaCO₃,especially from single-pass RO without softening
Power generation and industrial steam users requiring>16 MΩ·cm product water,where 18 MΩ·cm resistivity is not required
Facilities aiming to eliminate on-site hazardous chemicals and waste neutralization for water polishing
Project flow demands from 5 m³/h upward,scalable to over 200 m³/h by paralleling multiple VNX55-HH modules
Not recommended for:
Ultrapure water loops requiring 18 MΩ·cm with boron and silica removal>99%.In semiconductor or microelectronics applications,select the Ionpure VNX55-EX instead—it guarantees 18 MΩ·cm and>99%boron/silica removal.
Feed water hardness exceeding 2.0 ppm as CaCO₃.If raw water or RO permeate exceeds this limit,install a softener upstream or consider a hardness-tolerant reverse osmosis membrane pre-treatment design.
Small polishing loops needing less than 2 m³/h continuous flow.Operating the VNX55-HH at a deep turndown causes flow maldistribution and can shorten resin life.For smaller applications,choose the Ionpure LX or IP-LXM series modules.
FAQ
1.What is the maximum hardness the VNX55-HH module can handle?
The VNX55-HH accepts up to 2.0 ppm total hardness as CaCO₃continuously.This allows direct feed from single-pass reverse osmosis permeate without a softener in most municipal and surface water applications.
2.Is the VNX55-HH suitable for semiconductor ultrapure water systems?
No,we recommend the VNX55-EX for semiconductor applications.The VNX55-HH produces>16 MΩ·cm and removes>90%of silica,whereas semiconductor polishing requires 18 MΩ·cm resistivity and>99%silica and boron removal.
3.How much does the VNX55-HH electrodeionization system cost?
The VNX55-HH module typically ranges from 25,000to40,000 USD,depending on project volume and configuration.Prices fluctuate due to exchange rates,tariffs,and factory adjustments.For an accurate quotation,contact Beijing Zhongping Technology directly.
4.Can we pilot test or rent a CEDI module before purchasing?
We arrange pilot testing using a pre-assembled skid with one VNX55-HH module,confirming product water quality,recovery rate,and hardness tolerance on your actual feed water.Beijing Zhongping Technology coordinates pilot setup and performance validation.
5.What payment terms are available for water polishing system purchases?
We accept irrevocable letter of credit(L/C at sight)and wire transfer(T/T).For multi-module capital projects,Beijing Zhongping Technology offers milestone-based payment schedules after credit evaluation.
6.What is the delivery lead time for the VNX55-HH module?
Standard factory lead time is 8–10 weeks ex-works.Regional distributors with local stock can sometimes ship within 3–4 weeks.We confirm current inventory status at quotation.
7.What pretreatment is required before the VNX55-HH?
Feed water must be reverse osmosis permeate with conductivity<40µS/cm,hardness<2.0 ppm as CaCO₃,free chlorine<0.02 ppm,and temperature between 5–45°C.Single-pass RO with UV dechlorination and 5µm cartridge filtration is the standard pretreatment arrangement;a softener is not required.
8.What is the water recovery rate and reject volume of the VNX55-HH?
The module operates at 80–90%water recovery.At nominal 10 m³/h product flow,reject flow is 1.1–2.5 m³/h.Higher hardness feed water tends toward the lower end of the recovery range to prevent scaling.
9.Do you provide startup and commissioning support?
We provide factory-supervised startup for the first module installation at each site,including integrity testing,DC power supply setup,and operator training.Beijing Zhongping Technology also offers annual service agreements for ongoing support.
10.What warranty comes with the VNX55-HH module?
We provide a 2-year limited warranty covering materials and workmanship under specified operating conditions.Extended warranty options to 5 years are available.We require feed water quality records and annual performance data to maintain warranty coverage.
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
