IONPURE VNX55-EX High Flow CEDI EDI Module Water Treatment for Pharma Ultra High Purity Water Systems

　　Ionpure VNX55-EX is a high-flow CEDI(continuous electrodeionization)module for ultra high purity water systems,engineered specifically for microelectronics and semiconductor fabrication.Rated for 12.5 m³/h(55 gpm)nominal product flow,it delivers 18 MΩ·cm resistivity with>99%silica and boron removal,operating without acid/caustic chemicals and achieving 95–97.5%water recovery.

　　What Is an EDI Module for Water Treatment?

　　An EDI module is an electrochemical water purification device that removes ionizable contaminants from RO permeate using ion-exchange membranes,mixed-bed resins,and a DC electric potential.It replaces conventional mixed-bed deionization,eliminating the need for chemical regeneration.

　　Continuous electrodeionization modules are categorized by flow capacity:small laboratory units(typically<1 m³/h),medium industrial units,and high-flow modules for central plant applications.The VNX55-EX belongs to the high-flow category,designed for large-scale ultrapure water production in microelectronics fabs where consistent 18 MΩ·cm water quality and silica/boron control are non-negotiable.

　　Key Specifications

　　Nominal Product Flow:12.5 m³/h(55 gpm)

　　Product Water Resistivity:18 MΩ·cm(guaranteed)

　　Silica(SiO₂)Removal:>99%

　　Boron Removal:>99%

　　Sodium(Na⁺)Removal:>99.9%

　　Chloride(Cl⁻)Removal:>99.9%

　　Water Recovery:95–97.5%

　　Operating Voltage Range:0–300 VDC

　　Operating Current Range:2.0–13.2 A

　　Maximum Feed Water Conductivity:<10µS/cm

　　Feed Water Pressure Range:2.1–7 bar(30–100 psi)

　　Feed Water Temperature Range:20–45°C(68–113°F)

　　Maximum Ambient Temperature:45°C(113°F)

　　Residual Free Chlorine Tolerance:<0.02 ppm(as Cl₂)

　　Feed Water Hardness(as CaCO₃):<0.1 ppm

　　Feed Water Silica(SiO₂):<0.5 ppm

　　Module Dimensions(Diameter×Length):44.45 cm×213.3 cm(17.5 in×84 in)

　　Connection Type:50 mm butt-weld polypropylene(PP)flange connections

　　Certifications:CE Marked,ISO 9001:2015 and ISO 14001:2015(manufacturer facility certificates)

　　Concentrate and Electrode Compartment Sealing:Through-port gasket design

　　Technical Highlights

　　Chemical-free operation eliminates regeneration infrastructure.The VNX55-EX uses DC power and membrane-driven ion migration to continuously regenerate its mixed-bed resin.A frequent question is whether the module requires acid or caustic injection—it does not.No neutralization tanks,chemical storage,or waste treatment systems are needed,reducing facility footprint and operational complexity compared to conventional mixed-bed polishers.

　　95–97.5%recovery rate minimizes wastewater discharge.High water recovery is achieved by recirculating concentrate and electrode streams,sending only a small bleed to drain.In ultrapure water plants treating 100 m³/h of RO permeate,this translates to 2.5–5 m³/h reject,substantially lowering feed water demand and disposal costs versus ion exchange systems that require periodic full-batch regeneration.

　　Through-port gasket sealing prevents external leaking.Double O-ring and through-port gasket technology on each concentration channel eliminates the intercompartment leaks that can degrade product water quality over time.This design is critical for maintaining 18 MΩ·cm resistivity in microelectronics polishing loops.

　　Integrated electrical junction box simplifies field wiring.Each module includes a pre-terminated junction box with factory-installed power cables,reducing installation labor and preventing miswiring of electrode polarity.

　　Enhanced silica and boron removal targets microelectronics specifications.Guaranteed>99%removal of both silica and boron surpasses typical mixed-bed performance,addressing the two most difficult weakly ionized species that cause wafer defects in semiconductor manufacturing.

　　Applications

　　Semiconductor wafer fabrication final polishing:Produces 18 MΩ·cm ultrapure water for wafer rinsing and immersion lithography.The>99%boron removal prevents p-type doping contamination,and silica removal protects optics from siliceous deposits.

　　Microelectronics and flat panel display manufacturing:Supplies high-purity process water to TFT-LCD,OLED,and micro-LED production lines where ionic residues must be kept below parts-per-trillion levels.

　　Power generation and boiler feed water makeup:Eliminates mixed-bed ion exchange at combined-cycle power plants,providing sub-0.1µS/cm conductivity feed water for high-pressure boilers while avoiding hazardous chemical handling.

　　Pharmaceutical purified water and water-for-injection pre-treatment:Though final compendial water requires distillation or reverse osmosis plus polishing,the VNX55-EX serves as a continuous deionization stage that maintains<1.3µS/cm conductivity per USP<645>upstream of WFI stills,reducing distillation scaling and energy consumption.

　　Central ultrapure water plants for high-tech industrial parks:Parallel configurations of multiple VNX55-EX modules deliver over 228 m³/h(1,000 gpm)18 MΩ·cm water from a single polished water system,lowering per-cubic-meter water cost compared to distributed point-of-use polishers.

　　Selection Guidance

　　Suitable applications:

　　High-purity water demands starting at 5 m³/h and scaling above 50 m³/h,where a single 12.5 m³/h module or parallel banks replace multiple mixed-bed vessels with chemical-free operation

　　Incoming RO permeate quality consistently≤10µS/cm,free chlorine<0.02 ppm,and temperature maintained between 20–45°C—typical of double-pass RO pretreatment

　　Projects where eliminating hazardous acid/caustic chemicals,neutralization systems,and resin change-outs is a safety or cost-priority

　　Microelectronics and semiconductor facilities requiring validated silica<0.5 ppb and boron<50 ppt in product water

　　Not recommended for:

　　Feed water conductivity exceeding 10µS/cm(e.g.,single-pass RO directly on high-TDS brackish water).Install a secondary RO or softener/degasifier upstream,or select a CEDI module rated for higher feed conductivity such as an Ionpure VNX30-CDIT.

　　Water temperatures below 15°C for extended periods.Low temperature increases water viscosity and reduces ion mobility,leading to product resistivity drop below the guaranteed 18 MΩ·cm.In cold feed scenarios,a plate heat exchanger using facility heating water should preheat the RO permeate to>20°C.

　　Very small-scale polishing where a single module exceeds the required flow.Operating a 12.5 m³/h module at less than 20%turndown may cause uneven flow distribution and localized resin exhaustion.For flows under 2.5 m³/h,consider smaller Ionpure modules such as the LX or IP-LXM series.

　　FAQ

　　1.What resistivity or water quality does the VNX55-EX guarantee?

　　The module guarantees 18 MΩ·cm product water resistivity when feed water meets the required inlet conditions.Typical measured performance at rated flow is 17.5–18.2 MΩ·cm,with silica below 0.5 ppb and boron below 50 ppb.

　　2.What is the expected service life of the VNX55-EX CEDI module?

　　The module is designed for a minimum service life of 7 years under normal operating conditions with consistent feed water quality.Many installations achieve 8 to 10 years before requiring factory refurbishment.We recommend periodic performance trending of voltage and product resistivity to predict end-of-life.

　　3.How much does the VNX55-EX cost and what is the price range?

　　The VNX55-EX typically ranges from 28,000to45,000 USD per module,depending on project size,configuration,and regional distribution.Prices fluctuate due to exchange rates,tariffs,and factory adjustments.For an accurate quotation with delivery terms,contact Beijing Zhongping Technology directly.

　　4.Do you offer a trial,rental,or pilot testing arrangement before full purchase?

　　We arrange pilot testing using a pre-configured skid with a single VNX55-EX module at the customer’s site.This confirms product water quality and recovery rate under actual feed water conditions before capital commitment.Contact Beijing Zhongping Technology to schedule a pilot test.

　　5.What are the delivery time and lead time for the VNX55-EX?

　　Standard ex-works lead time is 8 to 10 weeks.Accelerated delivery may be available for urgent project timelines.Authorized distributors with regional inventory can reduce lead time to 4 weeks.

　　6.What payment terms and financing options are available?

　　We accept irrevocable letter of credit(L/C at sight),wire transfer(T/T),and for qualified buyers,deferred payment terms after credit evaluation.For multi-unit capital projects,Beijing Zhongping Technology can structure milestone-based payment schedules.

　　7.What pretreatment or feed water quality is required before the VNX55-EX?

　　Feed water must be RO permeate with conductivity<10µS/cm,temperature 20–45°C,free chlorine<0.02 ppm,hardness<0.1 ppm,and silica<0.5 ppm.Double-pass reverse osmosis with UV dechlorination and heat exchange is the standard pretreatment configuration.

　　8.Can the VNX55-EX operate intermittently or in hot-standby mode?

　　The module can be placed in recirculation standby for up to 72 hours without water flow,as long as a low trickle voltage(typically 0.5–1 A)is maintained to prevent biofouling and ionic exhaustion.Startup from extended shutdown requires a sanitization flush sequence.

　　9.What are the ongoing operating costs or consumables for the VNX55-EX?

　　There are no acid,caustic,or resin replacement consumables.The only operating cost is DC power consumption—typically 0.1–0.3 kWh per cubic meter of product water—plus a small reject water flow.Routine maintenance is limited to annual inspection of seals and electrical connections.

　　10.Is installation and commissioning support available,and what does it include?

　　We provide factory-supervised commissioning and startup support for the first module installation at each site.This includes integrity testing,power supply calibration,and operator training.Extended service agreements covering annual health checks and on-site troubleshooting are available from Beijing Zhongping Technology.