EDI Module, Deepflow CYTTEDI05 Ultra-Pure Water System (5 L/h)

Overview

The Deepflow CYTTEDI05 EDI Module is an electrodialysis ion exchange unit engineered for continuous, chemical-free polishing of reverse osmosis (RO) permeate into Type I ultra-pure water (UPW), compliant with ASTM D1193-20, ISO 3696:1987, and CLSI EP21-A guidelines. Unlike traditional mixed-bed deionization requiring periodic regeneration with hazardous acids and caustics, this module employs stacked anion/cation exchange membranes and ion-selective resins under direct current to drive dissolved ions from the feed stream toward electrodes—effectively removing >99.9% of residual ionic contaminants without consumables or downtime. Designed for integration into benchtop or centralized ultra-pure water systems, the CYTTEDI05 delivers a stable 5 L/h output at resistivity ≥18.2 MΩ·cm (25 °C), conductivity ≤0.055 µS/cm, TOC <5 ppb, and microbial load <1 CFU/mL—meeting critical requirements for HPLC mobile phase preparation, cell culture media formulation, trace metal analysis, and semiconductor rinse applications.

Key Features

• Chemical-free operation: Eliminates need for acid/base regeneration, reducing operational risk, waste disposal burden, and maintenance labor.
• Stable high-resistivity output: Maintains ≥18.2 MΩ·cm continuously under varying inlet water quality (RO permeate conductivity ≤10 µS/cm).
• Integrated intelligent monitoring: Real-time display of inlet/outlet conductivity, current draw, voltage, and system status via front-panel LCD interface.
• Modular plug-and-play design: Standard 1/4″ compression fittings and DIN-rail mounting enable rapid integration with existing RO skids or UPW distribution loops.
• Low-energy architecture: Optimized electrode configuration and membrane stack geometry achieve typical power consumption of 12–18 W during steady-state operation.
• Self-cleaning capability: Automatic polarity reversal during low-flow conditions minimizes scaling and fouling on membrane surfaces.

Sample Compatibility & Compliance

The CYTTEDI05 is validated for use with RO permeate meeting strict pretreatment specifications: silica <0.5 mg/L, total hardness <0.5 ppm as CaCO₃, free chlorine 1 NTU), colloidal silica, or organic foulants exceeding 0.3 mg/L TOC. The module conforms to CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU LVD Directive), and its construction materials—including FDA-compliant polypropylene housing, ASTM F2136-certified ion-exchange membranes, and platinum-coated titanium electrodes—support GLP/GMP environments. Full audit trails, user access control, and electronic signature support are available when paired with Deepflow’s optional AquaControl™ SCADA software (compliant with FDA 21 CFR Part 11 Annex 11 requirements).

Software & Data Management

When integrated with Deepflow AquaControl™ v3.2 (optional), the CYTTEDI05 supports time-stamped event logging, configurable alarm thresholds (e.g., conductivity drift >0.01 µS/cm/min), remote diagnostics via Modbus RTU/TCP, and automated report generation in PDF/CSV formats. All operational data—including current/voltage profiles, cumulative runtime, and alarm history—are stored locally on encrypted SD card and synchronized to cloud-based dashboards for multi-site fleet management. Audit logs record operator ID, timestamp, parameter changes, and system resets—ensuring full traceability for ISO 17025 accreditation or pharmaceutical validation (IQ/OQ/PQ protocols).

Applications

• HPLC, UHPLC, and LC-MS mobile phase and blank preparation where ionic background suppression is essential.
• Preparation of reagent-grade buffers for ELISA, Western blotting, and qPCR assay development.
• Final rinse water in cleanroom environments for photomask and wafer fabrication (SEMI F57-0212 compliance support).
• Feedwater for quartz crystal microbalance (QCM) and surface plasmon resonance (SPR) biosensors requiring sub-ppb ionic noise floors.
• Cell line expansion and monoclonal antibody production workflows governed by USP and Ph. Eur. 2.2.48.

FAQ

What inlet water quality is mandatory for reliable CYTTEDI05 performance?
RO permeate must exhibit conductivity ≤10 µS/cm, silica ≤0.5 mg/L, total hardness <0.5 ppm as CaCO₃, and zero free chlorine or ozone residuals. Pre-filtration through 1 µm + activated carbon + 0.2 µm final filter is strongly recommended.
Can the CYTTEDI05 be operated intermittently or must it run continuously?
It is designed for continuous duty; however, automatic standby mode engages during flow interruption >30 minutes, preserving resin integrity and minimizing electrode polarization. Restart requires ≤90 seconds to re-establish spec-grade output.
Is validation documentation (DQ/IQ/OQ) available for regulated laboratories?
Yes—Deepflow provides a complete validation toolkit including URS template, FAT/SAT protocols, calibration certificates for integrated sensors, and PQ test scripts aligned with EU GMP Annex 15 and WHO TRS 970.
How often does the module require preventive maintenance?
Annual inspection of electrode contacts, membrane stack integrity, and seal condition is advised. No resin replacement is needed; lifespan exceeds 3 years under specified feedwater conditions.
Does the CYTTEDI05 meet requirements for pharmacopeial purified water (PW) or water for injection (WFI)?
No—it produces Type I ultra-pure water only. For PW/WFI compliance, additional distillation or nanofiltration stages and microbial control (e.g., UV 254 nm + 0.1 µm filtration) are required per USP and Ph. Eur. 2.2.48.