BenAng RL-15 Reverse Osmosis Pure Water System

Overview

The BenAng RL-15 Reverse Osmosis Pure Water System is a compact, benchtop-grade water purification platform engineered for laboratories requiring consistent, high-reliability Grade I pure water per ASTM D1193-20, NCCLS CLSI EP21-A, GB/T 6682–2008 (Class I), and GB/T 11446.1–1997 (EW-I) standards. It employs a multi-stage purification architecture anchored by a high-efficiency thin-film composite (TFC) reverse osmosis membrane—originally developed for NASA-certified closed-loop life support applications—to achieve >99% rejection of dissolved ions, colloids, microorganisms, and organic macromolecules. Unlike single-stage RO units, the RL-15 integrates dual activated carbon polishing stages and an optional integrated ultraviolet (UV) irradiation module (254 nm + 185 nm) to ensure robust TOC reduction and microbial inactivation. Its design prioritizes operational continuity: automatic membrane flush cycles prevent scaling under variable feedwater conditions; intelligent pressure-sensor logic enables fail-safe shutdown during low-inlet or high-backpressure events; and a sealed recirculation loop maintains stable resistivity between dispenses.

Key Features

• High-rejection TFC RO membrane (100 GPD capacity) with documented salt rejection ≥96% and microbial removal >99.5%, validated per ISO 14644-1 Class 5 cleanroom-compatible performance
• Dual-stage activated carbon post-filtration (granular + block) for residual chlorine, VOCs, and THMs adsorption—critical for protecting downstream ion exchange resins
• Integrated UV oxidation (185 nm + 254 nm) option reduces TOC to ≤3 ppb and provides continuous endotoxin inactivation without chemical dosing
• Self-calibrating TDS monitor with real-time digital display (optional); compatible with external conductivity/resistivity meters for GLP-compliant logging
• Automated daily RO membrane flush cycle triggered by timer or usage threshold—no manual intervention required
• Modular prefilter cartridge system (PP + GAC) rated for up to 24 months under typical municipal feedwater (TDS <150 ppm), minimizing maintenance frequency and total cost of ownership
• Compact footprint (42 × 41 × 22 cm) with vibration-damped chassis—designed for integration beneath fume hoods or into shared core facility utility cabinets

Sample Compatibility & Compliance

The RL-15 delivers water meeting strict specifications for analytical-grade applications where ionic interference, organic contamination, or endotoxin carryover must be eliminated. Its output complies with ASTM D1193 Type I requirements for resistivity (≥18.2 MΩ·cm), TOC (<5 ppb for ultrapure mode), and bacterial endotoxin levels (<0.001 EU/mL). The system’s construction materials—including FDA-compliant polypropylene housings, EPDM seals, and stainless steel fittings—ensure leachate-free operation across pH 5.0–8.5. All electrical components conform to IEC 61010-1 safety standards for laboratory equipment. When configured with UV/UF options, it supports compliance with USP Water for Injection (WFI) pre-treatment validation protocols and ISO 14644-1 Class 5 environmental monitoring workflows.

Software & Data Management

While the RL-15 operates via embedded microcontroller logic (no PC dependency), its digital interface supports audit-ready data capture when paired with third-party logging hardware. The system records cumulative runtime, total volume dispensed, and membrane flush event timestamps—accessible via serial output (RS-232) or analog 4–20 mA signal for integration into centralized facility SCADA systems. Optional data acquisition modules enable automated export of timestamped TDS/resistivity values compliant with 21 CFR Part 11 requirements when used with validated electronic lab notebook (ELN) platforms. All firmware updates are performed via secure USB interface with cryptographic signature verification.

Applications

• HPLC and UHPLC mobile phase preparation, column equilibration, and system flushing
• ICP-MS, AAS, and ICP-OES blank preparation and diluent formulation
• Cell culture media reconstitution and sterile filtration support
• Protein electrophoresis buffer preparation and Western blotting wash solutions
• PCR master mix preparation and nucleic acid extraction reagent dilution
• Calibration standard preparation for clinical chemistry analyzers (e.g., Roche Cobas, Siemens Advia)
• Microelectronics wafer rinse steps requiring sub-ppb metal content

FAQ

What feedwater quality is required for optimal RO membrane longevity?
Municipal tap water with TDS ≤150 ppm, free chlorine 0.05 ppm or hardness >100 ppm necessitates optional iron-removal pretreatment.
Can the RL-15 be connected directly to analytical instruments?
Yes—when equipped with UV/UF and DI polishing modules, it provides point-of-use ultrapure water suitable for direct connection to HPLC autosamplers, mass spectrometer nebulizers, and cell culture incubator humidification systems.
Is the system compliant with GLP/GMP documentation requirements?
The RL-15 supports GLP/GMP workflows through configurable event logging, user-accessible service history, and compatibility with 21 CFR Part 11–compliant ELN systems when integrated with certified data acquisition hardware.
How often must consumables be replaced under typical lab use?
Prefilters require replacement every 12–24 months depending on feedwater TDS; RO membranes typically last 2–3 years; post-carbon and mixed-bed DI cartridges are replaced based on resistivity decay or TOC rise—typically every 6–12 months in continuous-use environments.
Does the unit include validation documentation?
Factory test reports—including as-delivered resistivity, TOC, and endotoxin measurements—are provided with each shipment. IQ/OQ protocols and installation qualification templates are available upon request for regulated environments.