Chu Ding Technology RH-N-15 Ultra Pure Water System

Overview

The Chu Ding Technology RH-N-15 Ultra Pure Water System is a dual-grade laboratory water purification platform engineered to produce both Type III purified water (per GB/T 6682–1992) and ASTM Type I ultrapure water from municipal tap feed. It employs a multi-stage purification architecture comprising pre-filtration, dual-stage reverse osmosis (RO), electrodeionization (EDI) or mixed-bed deionization (depending on configuration), and optional terminal ultrafiltration and UV oxidation. The system operates on the principle of sequential contaminant rejection—mechanical particulate removal, ionic exclusion via semi-permeable membranes, electrochemical ion exchange, and final sub-micron biological and organic polishing. Designed for unattended operation in analytical laboratories, it delivers consistent, trace-level purity required for sensitive instrumentation including ICP-MS, HPLC-MS, atomic absorption spectroscopy, and cell culture media preparation.

Key Features

• Microprocessor-controlled automation with blue-backlit LCD interface displaying real-time conductivity/resistivity, system pressure, RO membrane status, and consumable life remaining
• Intelligent self-protection logic: automatic shutdown during low feed pressure, high inlet turbidity, or tank overfill; integrated dry-run protection for booster pump
• Programmable RO membrane auto-flush cycle (adjustable frequency and duration) to minimize fouling and extend membrane service life beyond 24 months under typical lab usage
• Hermetically sealed pressurized storage tank with integrated air-breathing hydrophobic vent filter (0.2 µm PTFE), eliminating atmospheric recontamination and maintaining stable outlet resistivity for >72 hours
• Modular consumable design with RFID-tagged cartridges enabling automated usage tracking and predictive replacement alerts compliant with GLP documentation requirements
• Optional integrated 185/254 nm dual-wavelength UV chamber (16 W) and 0.1 µm final ultrafilter for enhanced TOC reduction and microbial control

Sample Compatibility & Compliance

The RH-N-15 meets or exceeds national and international water quality benchmarks applicable to analytical and life science workflows. Purified water output conforms to GB/T 6682–1992 Grade III specifications (conductivity ≤5 µS/cm at 25 °C). Ultrapure water output satisfies ASTM D1193–2020 Type I criteria (resistivity ≥10 MΩ·cm, TOC <50 ppb) and approaches ISO 3696:1987 Class 1 performance. When equipped with optional terminal filtration and UV, it achieves microbiological limits suitable for USP purified water and supports validation protocols aligned with FDA 21 CFR Part 11 data integrity standards. All wetted materials—including EPDM seals, 316L stainless steel manifolds, and food-grade PVC/PVDF tubing—comply with USP Class VI biocompatibility and EU Regulation (EC) No. 1935/2004 for indirect food contact.

Software & Data Management

The embedded control firmware logs timestamped operational parameters—including feed pressure, permeate conductivity, tank level, UV lamp intensity, and filter differential pressure—at 1-minute intervals for up to 12 months. Data export is supported via USB 2.0 port in CSV format, compatible with LIMS integration and audit-ready reporting. Optional Ethernet module enables remote monitoring through SNMP v3 and secure HTTPS access, supporting role-based user permissions (operator, supervisor, administrator). Audit trail functionality records all configuration changes, alarm events, and manual interventions with operator ID and IP address—fully traceable per ALCOA+ principles for GMP-regulated environments.

Applications

This system serves as a primary water source for high-sensitivity analytical platforms requiring low-background interference: liquid chromatography–mass spectrometry (LC-MS), inductively coupled plasma mass spectrometry (ICP-MS), and graphite furnace atomic absorption spectroscopy (GFAAS). It supports reagent preparation for molecular biology applications (e.g., PCR master mixes, electrophoresis buffers), calibration standard dilution for environmental testing (EPA Methods 200.7, 200.8), and cleaning of precision optics and semiconductor wafers. Its stable low-TOC output is validated for use in trace metal analysis where organic chelation must be minimized, and its sterile-grade dispensing mode supports aseptic rinsing of glassware and plasticware in QA/QC labs.

FAQ

What feed water quality is required for optimal RH-N-15 performance?
Municipal tap water with total dissolved solids (TDS) < 500 ppm, free chlorine < 1 ppm, and silt density index (SDI) 0.5 ppm chlorine or >1 NTU turbidity.
Can the RH-N-15 be integrated into a centralized lab water distribution loop?
Yes—its positive-pressure delivery and programmable dispensing protocol support connection to recirculating loops up to 30 m in length; optional loop circulation pump and temperature-controlled cabinet are available as accessories.
How often must consumables be replaced under standard usage conditions?
Pre-filters: every 6 months; RO membranes: 24–36 months; DI/EDI cartridges: 12–18 months; terminal ultrafilter: 6–12 months—exact intervals depend on feed water hardness and daily volume demand.
Is third-party IQ/OQ validation support available?
Chu Ding Technology provides documented validation templates (DQ/IQ/OQ) aligned with ISO/IEC 17025 and ASTM E2500, plus on-site qualification services by certified field engineers upon request.
Does the system comply with electronic record requirements for regulated industries?
Yes—the firmware implements full 21 CFR Part 11 compliance features including electronic signatures, audit trail encryption, and user authentication via password + PIN, with optional hardware security module (HSM) upgrade.