EDI Module, Deepflow CYTTEDI15 Ultra-Pure Water System (15 L/h)

Overview

The Deepflow CYTTEDI15 EDI Module is an electrodialysis ion exchange unit engineered for continuous, chemical-free polishing of purified water to ultrapure specifications. Integrated into multi-stage ultra-pure water systems, this module replaces traditional mixed-bed deionization by applying a direct current across ion-selective membranes and mixed-bed resin compartments—driving residual ionic contaminants (e.g., Na⁺, Cl⁻, HCO₃⁻, SO₄²⁻) toward electrode chambers while regenerating the resin in situ. Designed for stable operation at a nominal throughput of 15 liters per hour, the CYTTEDI15 delivers consistent resistivity ≥18.2 MΩ·cm (at 25 °C), total organic carbon (TOC) <5 ppb, and bacterial levels <0.1 CFU/mL—meeting ASTM D1193 Type I, ISO 3696 Class 1, and CLSI EP21-A guidelines for critical laboratory applications.

Key Features

• Continuous electrochemical regeneration: Eliminates need for periodic acid/base regeneration or cartridge replacement, reducing operational downtime and chemical handling risks.
• Integrated flow control and pressure monitoring: Built-in flow sensor and dual-pressure transducers (feed and concentrate lines) ensure optimal hydraulic balance and early detection of membrane fouling or scaling.
• Modular plug-and-play design: Standardized 3/8″ compression fittings and DIN-rail mounting brackets enable seamless integration with existing Deepflow UPW skids or third-party purification platforms.
• Low-energy DC power supply: Optimized stack architecture operates at ≤120 VDC with typical power consumption of 45–65 W under rated load, minimizing thermal load on system enclosures.
• Real-time performance diagnostics: Onboard microcontroller reports conductivity decay rate, current efficiency (%), and stack voltage drift—parameters logged via RS-485 Modbus RTU for predictive maintenance planning.

Sample Compatibility & Compliance

The CYTTEDI15 accepts pretreated feed water meeting standard reverse osmosis (RO) output specifications: silica <0.1 mg/L, hardness <0.5 ppm as CaCO₃, TOC <50 ppb, and SDI₁₅ 0.05 ppm free chlorine) or waters containing colloidal iron/manganese (>0.02 ppm). The module complies with IEC 61000-6-2 (EMC immunity) and IEC 61000-6-4 (EMC emissions), and its wetted materials—including FDA-compliant polypropylene housing, sulfonated/quinone-type ion-exchange membranes, and nuclear-grade mixed-bed resin—conform to USP and EP 2.2.42 for water purity instrumentation. System-level validation supports IQ/OQ documentation per ISO/IEC 17025 and GLP audit requirements.

Software & Data Management

When deployed within a full Deepflow ultra-pure water system, the CYTTEDI15 communicates bidirectionally with the central PLC via Modbus RTU. All operational parameters—including feed/concentrate flow rates, stack voltage, current draw, and outlet resistivity—are time-stamped and stored locally for ≥30 days. Optional cloud gateway firmware enables secure TLS 1.2 transmission to enterprise LIMS or SCADA platforms. Audit trails meet FDA 21 CFR Part 11 requirements, including electronic signatures, immutable event logs, and role-based access control (RBAC) for calibration and alarm threshold adjustments.

Applications

• HPLC and UHPLC mobile phase preparation where ionic leachables could compromise column lifetime or peak resolution.
• Cell culture media formulation requiring endotoxin-free, low-metal water per USP and ISO 13485 Annex A.
• ICP-MS and GF-AAS trace metal analysis, where sub-ppt background contamination must be excluded.
• Pharmaceutical stability testing per ICH Q5C, where water quality directly impacts degradation pathway interpretation.
• Calibration of conductivity and TOC analyzers used in regulated QC laboratories.

FAQ

What pretreatment is required upstream of the CYTTEDI15?
A two-pass RO system with UV oxidation (254 nm + 185 nm) and 0.2 µm final filtration is strongly recommended. Feed conductivity must remain below 10 µS/cm; higher values reduce current efficiency and accelerate scaling.

Can the module be operated intermittently?
Yes—but extended shutdowns (>8 hours) require automated flush cycles using permeate water to prevent resin desiccation and microbial colonization in the dilute compartment.

How often does the module require maintenance?
No scheduled consumable replacement is needed. Annual inspection includes membrane visual assessment, electrical contact resistance measurement, and verification of pressure differentials across the stack.

Is remote monitoring supported out of the box?
Modbus RTU interface is standard; Ethernet/IP or OPC UA gateways are available as optional add-ons for integration into facility-wide building management systems (BMS).