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/ MODULE-01 / ULTRAPURE SERIES CAPACITY: 1—200 m³/h

Skid-Mounted
EDI Ultrapure
Water Systems.

Engineered for high-pressure power plant boilers, semiconductor wafer cleaning, and pharmaceutical WFI. Delivering up to 18.2 MΩ·cm chemical-free pure water.

Resistivity
>16.0 MΩ
Up to 18.2 MΩ·cm
Silica / Boron
< 5 ppb
Deep Ion Removal
Recovery Rate
Up to 95%
Continuous EDI
DOWNLOAD DATASHEET (.PDF) → Speak to Engineer
WANDONG ENVIRO Double-Pass RO and EDI Ultrapure Water System
// POWER REQUIREMENT
380V + DC

// Deployment Paradigm

Stop Handling Hazardous Chemicals.
Start Continuous Deionization.

Traditional Mixed Bed (MB) Resins
  • × Requires dangerous HCl acid and NaOH caustic for regeneration.
  • × Massive environmental liability due to toxic chemical wastewater.
  • × Inconsistent water quality during resin exhaustion cycles.
  • × Frequent downtime required for manual regeneration.
WANDONG Electro-Deionization (EDI)
  • ✓ 100% Chemical-Free: Regenerates resin continuously using DC electric current.
  • ✓ Continuous Quality: No exhaustion cycles. Endless 18.2 MΩ·cm UPW supply.
  • ✓ Zero Hazardous Waste: Eliminates acid/caustic storage and neutralization pits.
  • ✓ Compact Skid: Pre-plumbed system with 50% less footprint than mixed beds.
/ MODULE-03 / GLOBAL SUPPLY CHAIN

Tier-1 Components.
Zero Compromise.

Ultrapure water demands ultimate precision. Our EDI systems are built exclusively on globally recognized electro-chemical technology and sanitary-grade materials.

01 / EDI STACK
Ionpure®
/ SnowPure

Global benchmark continuous electro-deionization modules. Chemical-free regeneration.

SERIES: CEDI / LX / VNX
WARRANTY: 3 YEARS
02 / RO PRE-TREATMENT
DOW FilmTec™

Upstream double-pass RO to protect EDI stacks from hardness, CO2, and organics.

TYPE: HIGH REJECTION BWRO
MODELS: BW30 / SG30LE
03 / POWER & CONTROL
SIEMENS®
+ DC Rectifier

S7-1200 PLC combined with precision DC Rectifiers for stable current delivery to the EDI stack.

VOLTAGE: ADJUSTABLE DC
SCADA: REMOTE I/O
ASME BPE COMPLIANT
04 / SANITARY PIPING
SS316L /
PVDF

Ultra-smooth internal finish to prevent microbial growth and ion leaching. Essential for 18.2 MΩ·cm.

INTERNAL FINISH: Ra ≤ 0.4μm
SKID FRAME: SS304
CAPEX OPTIMIZATION FLEXIBILITY
While we standardize on US Tier-1 EDI stacks for maximum reliability, we offer Budget-Optimized Configurations utilizing rigorously tested premium domestic alternatives (e.g., Dongda EDI 东大, CNP high-pressure pumps). We adapt to your project's CapEx limits without compromising the core 15+ MΩ·cm performance guarantee.
/ MODULE-03B / ENGINEERING CRAFTSMANSHIP

The Anatomy of Reliability.

Precision engineering down to the last weld. No shortcuts.

WANDONG ENVIRO Sanitary TIG Welding on SS316L Pipe
01 / WELDING
Sanitary TIG Welding
Flawless SS316L penetration with argon purging to ensure zero-leakage and prevent biofilm accumulation.
WANDONG ENVIRO EDI DC Rectifier Electrical Control Cabinet
02 / ELECTRICAL
DC Rectifier Wiring
Industrial-grade terminal blocks with clear schematic labeling, separating AC power from sensitive DC lines.
WANDONG ENVIRO Hygienic Stainless Steel Piping Manifold Welding
03 / HYDRAULICS
Dead-Leg Free Design
Piping layout strictly adheres to the 3D rule to eliminate dead legs where bacteria could breed.
WANDONG ENVIRO Sanitary SS304 Skid Frame for EDI System
04 / SKID FRAME
Heavy-Duty SS304
Fully enclosed or open-frame stainless steel skids designed with locking casters for easy deployment.
/ MODULE-03E / COMPONENT ANATOMY

Transparent Quality.
Inside the Hardware.

We don't hide behind metal enclosures. Explore the internal engineering of our core components that guarantee continuous 18.2 MΩ·cm operation.

WANDONG ENVIRO Grundfos Vertical Multistage Centrifugal Pump
01 / HP PUMP

CNP / Grundfos

Domestic first-line or European brand. Flow-passing parts made of SS304/316L stainless steel.

WANDONG ENVIRO Electrodeionization (EDI) Module Stack
02 / EDI MODULE

Ionpure / Dongda

High and stable quality of produced water. No need for acid-base regeneration.

WANDONG ENVIRO SS316L Polishing Mixed Bed for 18.2 MΩ Ultrapure Water
03 / FINAL POLISH

Polishing Mixed Bed

Removes trace impurities post-EDI to guarantee 18.2 MΩ·cm for semiconductor applications.

WANDONG ENVIRO Sanitary SS316L Cartridge Filter Housing
04 / SECURITY FILTER

SS304 Precision Filter

Effectively removes water impurities, sediments, and suspended solids before high-pressure stages.

/ MODULE-03D / PRE-TREATMENT ANATOMY

Visible Purification.
Multi-Stage Depth Filtration.

Protecting the downstream RO and EDI stacks is the secret to a 15-year lifespan. Our heavy-duty SS304 vessels utilize stratified media beds to eradicate suspended solids, chlorine, and hardness before they reach the high-pressure stage.

01

Quartz Sand Media

Stratified layers of refined quartz sand intercept large particulates, rust, and colloidal matter, reducing feed water turbidity to < 1.0 NTU.

02

Activated Carbon

High iodine-value granular activated carbon (GAC) absorbs residual free chlorine, organics, and odors. Absolute protection against polyamide RO membrane oxidation.

03

Ion-Exchange Resin

Food-grade cation resin softens the water by replacing scaling Calcium (Ca²⁺) and Magnesium (Mg²⁺) ions with Sodium (Na⁺), preventing RO and EDI scaling.

WANDONG ENVIRO EDI Pre-treatment Softener Cutaway
/ MODULE-03C / INTELLIGENT O&M & SAFETY

Cloud-Based IoT SCADA.
Unattended Operation.

Monitor and manage your UPW plant from anywhere in the world. Our proprietary YunPLC cloud system ensures zero downtime for critical semiconductor and power plant operations.

Smart Cloud Monitoring APP

Independently developed IoT APP system via 4G/WiFi. Detects real-time data and pushes SMS/WeChat alarms for abnormal conditions, realizing true unmanned management without fixed IPs.

01. Real-Time Resistivity Tracking LIVE GRAPH
02. EDI Voltage/Current Monitoring CONTINUOUS
03. Remote Parameter Adjustment APP ENABLED
04. Fault Alarm Push SMS / APP NOTIFY
05. Historical Data Log CLOUD STORAGE
CDO: INSERT APP DASHBOARD IMAGE

Showcasing real-time pressure, conductivity, and flow rate monitoring via iOS/Android interface.

Delivered in two zero-civil-work, plug-and-play form factors:

  • CONTAINERIZED (ISO HIGH-CUBE): Climate-controlled enclosures built to survive harsh EPC sites. 100% zero civil work—just connect pipes and power for instant water security.

  • SKID-MOUNTED (OPEN-FRAME): Ultra-compact, forklift-loadable carbon steel frames. Designed to drop seamlessly into existing industrial plants with zero facility disruption.

/ MODULE-04A / LIMITS

Inlet Boundary
Conditions.

EDI feed water MUST be RO permeate. Exceeding the Total Exchangeable Anion (TEA) or Hardness limits will cause catastrophic scaling and irreversibly burn the EDI modules.

⚠ ENGINEERING NOTICE
If feed water contains high CO2, an upstream Membrane Degassing (MDG) unit is strictly mandatory to reduce EDI electrical load and prevent scaling.
RO PERMEATE PARAMETER MAX LIMIT FOR EDI
Total Exchangeable Anions (TEA) < 25 ppm
Hardness (as CaCO₃) < 1.0 ppm
Silica (SiO₂) < 0.5 ppm
Total Organic Carbon (TOC) < 0.5 ppm
/ MODULE-04B / COMMITMENT

Target UPW
Performance Guarantee.

When inlet conditions are met, WANDONG ENVIRO contractually guarantees the following Ultrapure Water (UPW) quality standards.

✔ BOILER & SEMICONDUCTOR SAFE
Effluent strictly complies with ASTM D1193 Type I/II and EP/USP Purified Water Standards.
OUTPUT METRIC GUARANTEED VALUE
Resistivity 15.0 - 18.2 MΩ·cm
Silica (SiO₂) < 5 ppb
Sodium (Na+) < 1 ppb
EDI Recovery Rate 90% - 95%
root@wandong-engineering-server:~# cat edi_architecture_overview.log
> INITIATING SYSTEM OVERVIEW: WANDONG ENVIRO represents the pinnacle of containerized and skid-mounted ultrapure water integration. By eliminating the hazardous chemical handling associated with Mixed Bed (MB) resins, our continuous Electro-Deionization (EDI) secures uninterrupted 18.2 MΩ·cm operations for high-tech industries.
> PROCESS ANALYSIS: The heavy-duty UPW process architectures are built exclusively utilizing Tier-1 stacks (Ionpure/SnowPure/Dongda) paired with robust Double-Pass RO systems. Whether the application requires high-pressure boiler feedwater for power generation, or ultra-pure rinse water for microelectronics and semiconductor fabs, the design philosophy remains uncompromising.
> ENGINEERING PROTOCOL: All turnkey EDI solutions undergo a rigorous FAT with integrated DC Rectifier validation. This live fluid and electrical simulation ensures perfect ion migration, resin regeneration stability, and Siemens PLC logic integration. The result is a guaranteed chemical-free UPW supply with the lowest Total Cost of Ownership (TCO).
> SYSTEM STATUS: UPW / EDI OPERATIONAL
/ MODULE-05 / SPECIFICATION MATRIX

EDI Stack Selection
Cross-Manufacturer Matrix.

SCROLL HORIZONTALLY →
DATA SOURCE: OEM TECHNICAL BULLETINS
// CATEGORY EDI Module Class M1 Ionpure® / Evoqua USA M2 SnowPure USA M3 Dongda (东大) / Scinor CHINA / GLOBAL
Standard Capacity Power Plant Boiler Feed STANDARD
SERIES: LX-Series
Flow per Stack: 1.0 - 7.6 m³/h
Resistivity: > 16 MΩ·cm
Silica Removal: 95%
DC Voltage: 0-600 VDC
SERIES: Electropure EX
Flow per Stack: 1.0 - 5.5 m³/h
Resistivity: > 16 MΩ·cm
Silica Removal: 95%
DC Voltage: 0-400 VDC
SERIES: Dongda EDI
Flow per Stack: 1.0 - 6.0 m³/h
Resistivity: > 15 MΩ·cm
Silica Removal: 90%
DC Voltage: 0-300 VDC
Mega Flow (EPC) Heavy Industry / Base Load INDUSTRIAL
SERIES: VNX-Series
Flow per Stack: 11 - 15 m³/h
Resistivity: > 16 MΩ·cm
Silica Removal: 95%
Footprint: Ultra-Compact
SERIES: XL-Series
Flow per Stack: 7.5 - 10 m³/h
Resistivity: > 16 MΩ·cm
Silica Removal: 95%
Footprint: Modular
SERIES: Mega-Q
Flow per Stack: 10 - 15 m³/h
Resistivity: > 15 MΩ·cm
Silica Removal: 90%
Footprint: Modular
// Exact stack selection and parallel configuration depend on product flow rate and target resistivity. REV: 2026.01
/ MODULE-06 / PERFORMANCE

Continuous Stability
Resistivity & Power Modeling.

TABLE-6.1
EDI vs Mixed Bed Quality Curve
MΩ·CM OVER TIME
TECHNOLOGY START OF CYCLE END OF CYCLE (EXHAUSTED)
WANDONG EDI > 16.0 MΩ·cm > 16.0 MΩ·cm (No Drop)
Traditional Mixed Bed (MB) ~ 15.0 MΩ·cm < 1.0 MΩ·cm (Sharp Drop)
// EDI utilizes DC power to continuously regenerate the resin, ensuring a flat, stable high-resistivity curve unlike MB which drops sharply upon exhaustion.
TABLE-6.2
DC Power Consumption vs Feed TEA
KWH / M³ PRODUCED
RO PERMEATE TEA (PPM) REQ. RECTIFIER VOLTAGE DC POWER CONSUMPTION
< 5 ppm (Double-Pass RO) Low / ~ 100-200V Extremely Low
5 - 15 ppm Med / ~ 200-400V Moderate
> 25 ppm HIGH SCALING RISK PRE-TREAT REQUIRED
// Total Exchangeable Anions (TEA) including CO2 drives power draw. An upstream Membrane Degassing (MDG) unit drastically lowers EDI operating costs.
/ MODULE-07 / P&ID

Process Flow
Double-Pass RO + EDI Integration.

TOPOLOGY: SINGLE-PASS RO -> EDI · EDI RECOVERY: 90% · RESISTIVITY: > 15 MΩ·cm
STEP-01
RO Permeate
TDS < 10ppm
STEP-02
EDI Feed Pump
Stable Press.
STEP-03 ◆
EDI Stack
+ DC Rectifier
STEP-04
Reject Return
To RO Inlet
STEP-05 ★
UPW Tank
N2 Blanketed
FEED TDS
< 10 ppm
PRODUCT RESISTIVITY
> 15 MΩ·cm
SILICA
< 20 ppb
EDI RECOVERY
90%

How the Ultrapure Electro-Deionization (EDI) Process Works

Step 1: Double-Pass RO Conditioning. Feed water must be strictly pre-treated using a Double-Pass Reverse Osmosis (RO) system. This crucial ultrapure water generation step removes bulk dissolved solids, ensuring the feed to the EDI stack has a conductivity of < 2 μS/cm and total hardness near zero.

Step 2: Membrane Degassing (MDG). If the feed water contains high levels of dissolved carbon dioxide (CO2), an upstream Membrane Degassing unit is installed. Removing CO2 drastically lowers the Total Exchangeable Anion (TEA) load on the industrial EDI module, allowing for lower DC power consumption and preventing scaling.

Step 3: Continuous Electro-Deionization (EDI). The RO permeate enters the EDI stack where it flows through ion-exchange resins. A direct electrical current (DC) is applied via a rectifier across the stack. This current drives the trace ions through selective ion-exchange membranes into a concentrate stream, while simultaneously splitting water molecules into H+ and OH- to continuously regenerate the resin. This eliminates the need for hazardous acid and caustic chemical regeneration used in traditional mixed bed demineralizers.

Step 4: UPW Polish & Distribution. For semiconductor-grade water, the EDI permeate passes through a final Polishing Mixed Bed. The resulting product water exits at up to 18.2 MΩ·cm resistivity, with Silica and Boron reduced to single-digit parts-per-billion (ppb) levels. The ultrapure water is then routed through sanitary SS316L or PVDF piping to a nitrogen-blanketed UPW tank, ready for use in power plant high-pressure boilers or semiconductor fab washing lines.

/ MODULE-08B / MICRO-ANATOMY

Electro-Chemical
Separation Dynamics.

Unlike traditional mixed beds, EDI utilizes a continuous DC electrical field to drive ions out of the feed water and into the concentrate channel, while simultaneously splitting water (H2O -> H+ + OH-) to continuously regenerate the ion-exchange resin.

Dilute Channel (Product Water)
Concentrate Channel (Reject)
DC Electrodes (Anode + / Cathode -)
WANDONG ENVIRO RO and EDI Ultrapure Water System P&ID Diagram
01. DC ELECTRODES Anode (+) / Cathode (-)
02. ION-EXCHANGE MEMBRANE Selective Cation/Anion Permeation
03. DILUTE COMPARTMENT Mixed Resin Bed (Product Flow)
04. CONCENTRATE CHANNEL Ion Reject Stream
/ FIELD DEPLOYMENT / APPLICATION

Proven In The Most
Demanding Industries.

Skid-mounted UPW plants delivering 18.2 MΩ·cm water where ionic impurities mean catastrophic failure.

EDI Ultrapure Water System for Power Plant Boiler Feedwater

Power Plant Boiler Feedwater

Protecting ultra-high-pressure steam turbines in coal, gas, and nuclear power plants. Continuous EDI eliminates boiler scaling and silica deposits.

18.2 MΩ·cm Ultrapure Water for Semiconductor Wafer Fabrication

Microelectronics & Semiconductors

Delivering 18.2 MΩ·cm Ultrapure Water (UPW) for wafer washing. Sanitary PVDF piping ensures zero TOC and particle leaching.

Sanitary SS316L EDI System for Pharmaceutical WFI

Pharmaceutical Manufacturing

Generating Purified Water (PW) and Water for Injection (WFI). ASME BPE compliant 316L sanitary skids meeting EP/USP standards.

/ MODULE-10 / SCOPE OF SUPPLY

Scope & Dimensions
Shipping Matrix.

// STANDARD INCLUSIONS
Battery Limits — Included
  • ✓SS304 Skid Frame · Epoxy Coated
  • ✓EDI Feed Pump · Grundfos / CNP
  • ✓EDI Modules · Ionpure / Dongda
  • ✓DC Power Rectifier Cabinet
  • ✓Siemens S7 PLC + HMI
  • ✓Sanitary UPVC / SS304 Piping Manifold
  • ✓Precision Resistivity Sensors (Input/Output)
  • ✓Flowmeters and Pressure Gauges
  • ✓Pre-Shipment FAT (Hydraulic & Electrical)
// OPTIONAL UPGRADES
À la Carte — Quote on Demand
  • +Upstream RO / Double-Pass RO Skid
  • +Membrane Degassing (MDG) Unit · For CO2 removal
  • +Sanitary SS316L Piping Upgrade · Ra < 0.4μm
  • +Sanitary PVDF Piping Upgrade · For Microelectronics
  • +Polishing Mixed Bed (Post-EDI) · For 18.2 MΩ·cm
  • +Remote Cloud APP SCADA · YunPLC
  • +UV-C TOC Destruction Unit · 185 nm
  • +Containerized Plug-and-Play Build
  • +ASME BPE Documentation Package
LEAD TIME
45-60 days
INCOTERMS
FOB / CIF / DDP
FAT
Pre-shipment Test ✓
DOC PACK
.DWG / .PDF / .STEP
TABLE-9.1
Shipping & Footprint Matrix
DIMENSIONS IN MM · WEIGHTS IN KG
MODEL CAPACITY (M³/H) INSTALLED POWER (DC) L × W × H (MM) DRY WEIGHT CONTAINER
WD-EDI-1 1.0 ~0.5 kW 800×600×1600 150 kg LCL
WD-EDI-2 2.0 ~0.8 kW 1000×600×1600 220 kg LCL
WD-EDI-5 5.0 ~1.5 kW 1500×800×1800 380 kg LCL
WD-EDI-10 10.0 ~3.0 kW 2000×1000×1800 650 kg 20'GP
WD-EDI-25 25.0 ~7.5 kW 3000×1200×2000 1,400 kg 20'GP
WD-EDI-50 50.0 ~15.0 kW 4500×1500×2200 2,600 kg 40'HQ
WD-EDI-100 100.0 ~30.0 kW 6000×2000×2400 5,000 kg 40'HQ
WD-EDI-200 200.0 ~60.0 kW 9000×2200×2400 9,500 kg 40'HQ
WD-EDI-MAX >200.0 Project Spec Custom EPC Custom EPC Bulk Skid
/ MODULE-11 / EPC CHECK

Documentation & Compliance.
Built for EPC Integration.

// EPC RESOURCE PACK

Complete Engineering Bundle

All technical drawings, datasheets, and integration files required for EPC contractors, system integrators and design houses.

.DWG P&ID
.PDF DATASHEET
.STEP 3D MODEL
.XLSX BOM
.DWG LAYOUT
.PDF O&M MANUAL
🔒 DOWNLOAD EPC PACK (.ZIP) 42 MB · SUBMIT DETAILS TO UNLOCK
// COMPLIANCE STANDARDS

Certified & Auditable

ISO 9001:2015Quality Management
✓ ACTIVE
ASME BPEBioProcessing
✓ COMPLIANT
CE / PED 2014/68/EUEU Directive
✓ ACTIVE
ASTM D1193Type I / II Water
✓ COMPLIANT
/ MODULE-12 / GLOBAL EMPOWERMENT

Risk-Free Overseas Deployment.
Foolproof Remote Commissioning.

Buying heavy machinery across borders shouldn't be a gamble. We replace expensive overseas dispatch fees with rigorous factory prep, color-coded assembly, and 1-on-1 video engineering support.

Color-Coded Assembly

Zero guesswork. All systems arrive with English 3D P&IDs, color-coded piping, and clearly labeled flanges. Your local mechanical contractors simply connect the dots.

Live FAT Verification

We eliminate startup risks at the factory. You witness your system undergo rigorous hydrostatic and performance testing via live stream before it ever boards a ship.

1-on-1 Video Support

Direct access to the English-speaking process engineers who built your plant. Live video troubleshooting ensures your local team never faces downtime alone.

// LIFETIME SUPPORT

Genuine Spares.
72-Hour Global Dispatch.

Protect your investment. We stock 100% original consumables. Air-freight friendly via DHL/FedEx to prevent catastrophic downtimes.

01
EDI MODULES
Ionpure / SnowPure
02
DC RECTIFIERS
Power Supplies
03
WATER SENSORS
Resistivity / TOC
04
CARTRIDGE FILTERS
PP / Melt-blown
/ MODULE-13C / TECHNICAL FAQ

Hardcore FAQ.
Engineering-Grade Answers.

EDI eliminates hazardous acid/caustic chemicals, requires zero downtime for regeneration, and provides a continuous flat-line 18.2 MΩ·cm resistivity, significantly lowering long-term OPEX and environmental liability.
EDI modules have strict limits on Hardness (<1 ppm) and TEA (<25 ppm). Feeding raw tap water or single-pass RO water (if TDS is high) will immediately scale and permanently destroy the delicate ion-exchange membranes inside the EDI stack.
High CO2 levels in RO permeate convert to bicarbonate and add to the anionic load (TEA) of the EDI. MDG removes CO2 mechanically, preventing EDI voltage spikes, lowering DC power consumption, and ensuring ultra-high resistivity.
Yes. By optimizing the DC voltage, managing the pH, and maintaining strict feed water parameters, our EDI stacks guarantee Silica (SiO2) removal down to < 5 ppb, perfectly safe for high-pressure turbines.
EDI recovery is typically 90-95%. The concentrate (reject) water is completely clean from organics and is simply routed back to the RO inlet tank, ensuring absolutely zero water waste.
We provide a comprehensive 12-month mechanical warranty on the skid, a 3-year OEM warranty on the EDI stacks, and offer complete remote video commissioning to guide your local team through startup.

Didn't find the answer you're looking for?

Speak to an Engineer
// Module-14 / Initiate Protocol

YOUR 50,000m²
ENGINEERING BACKEND.

"You focus on scaling your operations; let us handle the heavy-duty water infrastructure. Submit your parameters below, and our engineering team will architect a custom, zero-civil-work solution guaranteed to perform anywhere on earth."

Kane

Director of Global Projects

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