Duling DL-P2 Life Science-Grade Ultra Pure Water System
| Brand | Duling |
|---|---|
| Origin | Anhui, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | DL-P2 |
| Price Range | USD 4,200 – 7,000 (FOB) |
| Purified Water Grade | ASTM Type I / ISO 3696 Class 1 / CLSI EP28-A3c Grade A |
| Resistivity | 18.2 MΩ·cm @ 25 °C |
| Heavy Metals & Soluble Silica | < 0.1 ppb |
| Total Organic Carbon (TOC) | < 3 ppb |
| Microbial Count | < 0.1 CFU/mL |
| Endotoxin Level | < 0.002 EU/mL |
| Particles (>0.1 µm) | < 1 particle/mL |
| Feed Water Requirement | Municipal tap water or pre-treated RO water (conductivity ≤ 300 µS/cm, chlorine < 0.5 mg/L, SDI < 5) |
Overview
The Duling DL-P2 Life Science-Grade Ultra Pure Water System is an integrated, dual-stage purification platform engineered for laboratories requiring continuous, on-demand production of ultrapure water compliant with ASTM D1193 Type I, ISO 3696 Class 1, and CLSI EP28-A3c Grade A specifications. It employs a sequential purification architecture comprising pretreatment (activated carbon + dual-stage reverse osmosis), electrodeionization (EDI), and final polishing via a 0.1 µm hydrophilic PES membrane filter and dual-wavelength (185/254 nm) UV oxidation. This configuration ensures consistent removal of ions, organic contaminants, colloids, microorganisms, and endotoxins—critical for sensitive life science applications including cell culture, molecular biology, HPLC mobile phase preparation, and trace-level elemental analysis.
Key Features
- Real-time resistivity monitoring with temperature compensation (±0.1 °C) and automatic data logging at user-defined intervals (1–60 min)
- Dual-wavelength UV chamber (185 nm for TOC photolysis; 254 nm for microbial inactivation) integrated upstream of the final filter
- High-recovery EDI module with auto-regeneration cycle and low-energy operation (≤150 W standby, ≤350 W peak)
- Touchscreen HMI with multilingual interface (English, German, French, Spanish), system diagnostics, and alarm history (last 1,000 events)
- Modular design supporting field-upgradable components: UV lamp, DI cartridge, and endotoxin-retentive filter
- Sanitizable stainless-steel (316L) distribution loop option with recirculation pump and heat-sanitization capability (80 °C for 60 min)
Sample Compatibility & Compliance
The DL-P2 delivers water meeting stringent pharmacopeial and regulatory benchmarks for critical workflows. Its output satisfies USP “Water for Pharmaceutical Purposes”, EP 2.2.43 “Purified Water”, and JP XVII “Purified Water” requirements when operated with validated feed water and routine maintenance. The system supports GLP/GMP-aligned documentation: audit trail-enabled event logs, user-access levels (admin/operator/technician), and optional 21 CFR Part 11-compliant software add-on (with electronic signatures and data integrity controls). All wetted materials comply with USP Class VI biocompatibility testing; tubing and filters are certified non-pyrogenic and extractables-tested per ISO 10993-12.
Software & Data Management
The embedded control firmware stores ≥30 days of operational parameters—including resistivity, TOC (via optional inline sensor), flow rate, UV intensity, and pressure differentials—locally on encrypted flash memory. Data export is supported via USB 2.0 (CSV format) or Ethernet (Modbus TCP/IP) to LIMS or laboratory informatics platforms. Optional Duling AquaLink™ software provides remote monitoring, predictive maintenance alerts (e.g., cartridge saturation modeling based on conductivity drift), and automated report generation (daily QC summary, monthly compliance dashboard). All data timestamps include NTP synchronization and are immutable post-generation.
Applications
- Cell and tissue culture media preparation where endotoxin and nuclease contamination must be minimized
- HPLC, UHPLC, and LC-MS mobile phase and blank preparation to prevent column fouling and baseline noise
- PCR, qRT-PCR, NGS library construction, and CRISPR reagent formulation requiring ultra-low DNase/RNase activity
- Atomic absorption spectroscopy (AAS), ICP-OES, and ICP-MS calibration standards and diluent preparation
- Electrophysiology and patch-clamp experiments demanding stable ionic background and minimal particulate interference
- Pharmaceutical stability studies and analytical method validation under ICH Q5C and Q7 guidelines
FAQ
What feed water quality is required for optimal DL-P2 performance?
Municipal tap water with ≤300 µS/cm conductivity, free chlorine <0.5 mg/L, and SDI <5 is recommended. Pre-treatment with a dedicated RO unit is advised if feed water exceeds these limits.
Can the DL-P2 be connected to a central water distribution network?
Yes—optional recirculating loop kits with 316L stainless steel piping, sanitary tri-clamp fittings, and integrated heat-sanitization control are available for multi-point distribution (up to 30 m total loop length).
How often must consumables be replaced under standard usage (100 L/day)?
Pre-filters: every 6 months; RO membranes: 24–36 months; EDI stack: 36–48 months; UV lamp: 12 months; final 0.1 µm endotoxin filter: 6 months or after 1,500 L, whichever occurs first.
Is third-party certification available for ISO/IEC 17025 calibration of output water quality?
Duling provides factory-verified performance qualification (PQ) reports. Independent ISO/IEC 17025-accredited calibration and water testing services can be arranged through authorized partners in the EU, US, and APAC regions.
Does the system support integration with building management systems (BMS)?
Yes—dry-contact alarm outputs and Modbus TCP/IP protocol enable seamless integration with Siemens Desigo, Honeywell Experion, or Schneider EcoStruxure BMS platforms for centralized facility monitoring.
