Chu Ding Technology RU-N-30 Ultra Pure Water System
| Brand | Chu Ding Technology |
|---|---|
| Origin | Shanghai, China |
| Manufacturer Type | Authorized Distributor |
| Product Category | Domestic |
| Model | RU-N-30 |
| Price | USD 4,250 (FOB Shanghai) |
| Feed Water | Municipal Tap Water (0.5–4.0 bar) |
| Power Supply | AC 220 V / 50 Hz |
| Pure Water Output Rate (25 °C) | 30 L/h |
| Instantaneous Flow Rate | ≥2.0 L/min |
| Pure Water Conductivity | 1–5 µS/cm |
| Ultra-Pure Water Resistivity | 18.2 MΩ·cm |
| TOC | <10 ppb |
| Total Silica | <1.0 µg/L |
| Microbial Count | <1 CFU/mL |
| Endotoxin | <0.001 EU/mL |
| Particles (>0.22 µm) | <1 particle/mL |
| Recovery Rate | Up to 70% |
| Operating Temperature | 0–45 °C |
| Relative Humidity | ≤85% RH |
| Dimensions (L×W×H) | 400×460×500 mm |
| Noise Level | ≤40 dB (at 1 m) |
| Compliance | GB/T 6682–1992 (Grade III & Grade I), ASTM D1193–2022 Type I, ISO 3696:1987 Class 1 |
Overview
The Chu Ding Technology RU-N-30 Ultra Pure Water System is an integrated, dual-output laboratory water purification platform engineered for precision and reliability in analytical and life science applications. It employs a multi-stage purification architecture—comprising pre-filtration, reverse osmosis (RO), electrodeionization (EDI) or mixed-bed deionization (depending on configuration), ultraviolet oxidation (185/254 nm), and final 0.22 µm membrane filtration—to convert municipal tap water directly into both Type III (pure) water and Type I (ultra-pure) water in accordance with GB/T 6682–1992, ASTM D1193–2022, and ISO 3696:1987 standards. The system’s core design prioritizes operational continuity, low maintenance overhead, and consistent output stability under variable feed water conditions. Its closed-loop recirculation loop with integrated UV sterilization ensures microbial control without chemical intervention, supporting unattended operation over extended periods.
Key Features
- Microprocessor-controlled automation with real-time monitoring of conductivity, resistivity, TOC, and flow rate via backlit LCD interface
- Dual independent outlets: dedicated RO-pure water port (1–5 µS/cm) and ultra-pure water port (18.2 MΩ·cm, <10 ppb TOC)
- Intelligent RO membrane maintenance: programmable automatic flush cycles triggered at startup and on scheduled intervals
- Self-diagnostic safety protocols—including feed water pressure loss detection, low-level reservoir cutoff, and temperature-based flow regulation
- Low-noise operation (<40 dB at 1 m) enabled by vibration-damped pump assembly and acoustic insulation
- High-efficiency water recovery (up to 70%) achieved through optimized RO staging and permeate recycling logic
- Modular consumables architecture with RFID-tagged cartridges enabling usage tracking and predictive replacement alerts
- Integrated 185/254 nm dual-wavelength UV chamber for continuous TOC reduction and microbiological inactivation
Sample Compatibility & Compliance
The RU-N-30 delivers water suitable for high-sensitivity instrumentation requiring stringent ionic, organic, particulate, and biological purity. Its ultra-pure output meets or exceeds the specifications required for HPLC mobile phase preparation, LC-MS solvent formulation, trace metal analysis (ICP-MS, AAS), cell culture media supplementation, and molecular biology reagent synthesis. All wetted components are constructed from USP Class VI-certified materials (e.g., PEEK, PVDF, and pharmaceutical-grade stainless steel), ensuring extractables and leachables remain below detectable limits per USP and EP 2.2.43. The system supports GLP/GMP-aligned operation through configurable audit trail logging (optional firmware upgrade), alarm history retention, and user-access level management—facilitating compliance with FDA 21 CFR Part 11 when paired with validated electronic record systems.
Software & Data Management
The embedded control firmware records timestamped event logs—including cartridge lifespan metrics, daily production volume, conductivity/resistivity trends, and fault codes—for up to 12 months. Data export is supported via USB 2.0 interface in CSV format for integration into laboratory information management systems (LIMS). Optional Ethernet connectivity enables remote status monitoring and firmware updates via secure HTTPS protocol. All calibration and maintenance events are digitally signed and time-stamped, satisfying documentation requirements for ISO/IEC 17025-accredited laboratories. No cloud dependency or proprietary software installation is required for basic operation or data retrieval.
Applications
- HPLC and UHPLC mobile phase and column washing
- Preparation of standards and blanks for ICP-MS, GF-AAS, and ion chromatography
- Cell culture media, buffer, and reagent dilution in biopharmaceutical R&D
- Electrophoresis, ELISA, and PCR-grade water sourcing
- Calibration and verification of conductivity/resistivity meters
- Environmental testing (BOD/COD, TOC analyzer blanks)
- Pharmaceutical QC release testing per USP Water for Injection (WFI) support protocols
FAQ
What is the expected service life of the RO membrane under typical municipal feed water conditions?
With scheduled automatic flushing and proper pre-treatment (activated carbon + sediment filter), the RO membrane typically operates for 24–36 months before replacement is indicated by sustained resistivity decay or >15% decline in flux rate.
Can the system be validated for GMP environments?
Yes—the RU-N-30 supports IQ/OQ documentation packages and optional 21 CFR Part 11-compliant audit trail modules. Full validation support files (URS, FRS, DQ/IQ/OQ/PQ templates) are available upon request.
Is external DI polishing required to achieve 18.2 MΩ·cm resistivity?
No. The RU-N-30 integrates post-RO deionization (mixed-bed resin or EDI depending on configuration) and dual-wavelength UV, eliminating the need for add-on polishing units.
How does the system handle seasonal variations in feed water quality?
Adaptive flow control and dynamic pressure compensation algorithms adjust pump speed and valve timing to maintain stable output purity across fluctuating TDS, hardness, and chlorine levels.
Are consumables interchangeable with other RU-N series models?
Yes—all RU-N series units share identical cartridge form factors, resin chemistries, and UV lamp specifications, enabling cross-model inventory consolidation.
