EDI Module, Deepflow CYTTEDI70 Ultra-Pure Water System (70 L/h)
| Brand | Deepflow |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | CYTTEDI70 |
| Flow Rate | 70 L/h |
| Technology | Electrodeionization (EDI) |
| Output Water Quality | ≥18.2 MΩ·cm @ 25°C, <5 ppb TOC, <0.1 CFU/mL, <0.02 µm particle retention |
| Power Supply | 220 VAC, 50 Hz |
| Dimensions (W×D×H) | 450 × 550 × 720 mm |
| Weight | 42 kg |
| Certifications | ISO 9001, CE-marked (Low Voltage Directive & EMC Directive) |
| Compliance | Meets ASTM D1193 Type I, ISO 3696 Class 1, and CLSI EP28-A3c specifications for ultrapure water |
Overview
The Deepflow CYTTEDI70 EDI Module is a fully integrated electrodeionization unit engineered for continuous, chemical-free polishing of purified water to ultrapure grade (Type I per ASTM D1193). Designed as a modular component within multi-stage ultra-pure water systems, it replaces traditional mixed-bed ion exchange resins by combining ion-selective membranes, mixed-bed resin, and direct current electric fields to remove residual ions—including silica, sodium, chloride, and trace metals—from reverse osmosis (RO) permeate. Operating at a nominal flow rate of 70 liters per hour, the CYTTEDI70 delivers stable resistivity ≥18.2 MΩ·cm at 25°C, total organic carbon (TOC) <5 ppb, microbial load <0.1 CFU/mL, and particulate retention down to 0.02 µm—meeting stringent requirements for analytical chemistry, life science research, semiconductor rinse applications, and pharmaceutical water-for-injection (WFI) pretreatment.
Key Features
- Electrodeionization core with stacked anion/cation exchange membranes and embedded mixed-bed resin for sustained deionization without regeneration chemicals
- Intelligent DC power management system enabling automatic voltage adjustment based on feedwater conductivity and load demand
- Integrated flow-through conductivity and TOC monitoring ports (compatible with third-party sensors) for real-time water quality verification
- Modular stainless-steel 316L housing with sanitary tri-clamp connections (1/2″ or DN15) for seamless integration into existing purification skids
- Low-energy consumption design: average power draw ≤120 W under full-load operation
- Self-diagnostic firmware with LED status indicators for stack voltage, current, pressure differential, and alarm conditions
- No scheduled resin replacement; service intervals determined by feedwater quality and runtime—typically 3–5 years under controlled RO pretreatment
Sample Compatibility & Compliance
The CYTTEDI70 accepts RO permeate with inlet conductivity ≤20 µS/cm and silica ≤0.5 mg/L. It is incompatible with feedwater containing oxidants (e.g., chlorine, ozone), hardness >1 ppm CaCO₃, or suspended solids >1 NTU. All wetted materials comply with USP Class VI biocompatibility standards and FDA 21 CFR 177.2420 for polymeric components. The module meets ISO 9001:2015 quality management requirements and carries CE marking under 2014/35/EU (LVD) and 2014/30/EU (EMC). Its performance output aligns with ASTM D1193 Type I, ISO 3696 Class 1, and CLSI EP28-A3c guidelines for critical laboratory water—supporting GLP/GMP audit readiness when deployed in validated water systems.
Software & Data Management
While the CYTTEDI70 operates as a standalone hardware module, it includes analog 4–20 mA outputs for conductivity, flow, and voltage signals—enabling connection to centralized SCADA or building management systems (BMS). Optional digital integration via Modbus RTU (RS-485) allows remote parameter readout (e.g., stack resistance, accumulated runtime, fault logs) and basic control (start/stop, alarm reset). All operational data points are timestamped and exportable in CSV format. When paired with Deepflow’s optional AquaLog™ supervisory software (sold separately), users gain trend analysis, calibration history tracking, and electronic audit trails compliant with FDA 21 CFR Part 11 for signature-enabled event logging.
Applications
- HPLC, UHPLC, and LC-MS mobile phase preparation requiring low ionic background and minimal organic interference
- Cell culture media formulation and reagent dilution where endotoxin and nucleases must be minimized
- Atomic absorption spectroscopy (AAS), ICP-OES, and ICP-MS sample introduction and blank preparation
- Photolithography rinse steps in microelectronics R&D labs demanding particle-free, low-metal water
- Pharmaceutical process water loops serving clean steam generators or final filter validation protocols
- Calibration standard preparation for trace metal analysis (e.g., EPA Method 200.8)
FAQ
What pretreatment is required upstream of the CYTTEDI70?
A two-stage RO system with ≥99% salt rejection and post-RO degasification (for CO₂ removal) is mandatory. Feedwater must be polished by a 1 µm cartridge filter and UV oxidation (185/254 nm) to suppress microbial growth and oxidize organics prior to EDI entry.
Can the CYTTEDI70 be used in a recirculating loop configuration?
Yes—provided loop velocity exceeds 1.5 m/s and a 0.22 µm final membrane filter is installed downstream to prevent biofilm accumulation in stagnant zones.
Does this module support GMP-compliant validation documentation?
Deepflow provides IQ/OQ protocol templates, material traceability records (MTRs) for all wetted parts, and factory performance test reports (FPTRs) upon request—fully aligned with Annex 15 and WHO TRS 970 validation frameworks.
How often does the EDI stack require cleaning or maintenance?
Under recommended feedwater quality, chemical cleaning is rarely needed. Routine maintenance consists of quarterly visual inspection of electrodes and annual verification of membrane integrity via pressure-drop profiling.
Is the CYTTEDI70 compatible with non-Deepflow RO systems?
Yes—provided interface dimensions, electrical specs, and signal protocols match published technical interfaces; compatibility verification is recommended prior to integration.
