Anyan AYAN-5LG Membrane-Based Nitrogen Generator

Overview

The Anyan AYAN-5LG Membrane-Based Nitrogen Generator is an engineered solution for on-demand, high-purity nitrogen supply in laboratory and light industrial environments. It employs hollow-fiber polymeric membrane separation technology—originally developed and refined in South Korea—to selectively permeate oxygen, carbon dioxide, water vapor, and other trace gases from compressed ambient air, while retaining nitrogen with high selectivity and consistent throughput. This process relies on the differential solubility and diffusivity of gases in the membrane polymer matrix under controlled pressure gradients (typically 0.6–0.8 MPa feed pressure), enabling continuous, valve-free nitrogen production without adsorption cycles or regeneration downtime. Unlike pressure swing adsorption (PSA) systems, the AYAN-5LG operates with no moving valves, zero consumable molecular sieves, and no periodic purge or desorption phases—making it particularly suitable for applications requiring stable, low-maintenance gas delivery over extended periods.

Key Features

• Imported Korean Hollow-Fiber Membrane Module: High-selectivity, thermally stabilized polyimide membranes deliver stable 99.9% N₂ purity across rated flow (5 L/min) with >10,000 hours operational life under ISO 8573-1 Class 2 compressed air input.
• Integrated Multi-Stage Filtration System: Three-stage pre-filtration includes coalescing (0.01 µm particulate removal), activated carbon (hydrocarbon and odor adsorption), and ultra-fine membrane dryer—ensuring inlet air meets ISO 8573-1:2010 Class 2.2.2 specifications prior to membrane entry.
• Onboard Oil-Free Scroll Compressor: Designed for continuous duty; features suspended anti-vibration mounting and acoustic insulation housing to maintain sound pressure levels ≤55 dB(A) at 1 m distance.
• Dual-Range Pressure Regulation: Independent control of feed pressure (for membrane efficiency optimization) and outlet pressure (for instrument compatibility), both adjustable via calibrated analog dials with digital verification.
• Real-Time Purity Monitoring: Built-in electrochemical oxygen sensor (0–5% O₂ range, ±0.1% accuracy) coupled with microprocessor-driven LED display provides continuous readout of residual oxygen concentration—directly correlating to N₂ purity (e.g., ≤100 ppm O₂ ≡ ≥99.9% N₂).
• Zero-Switching Architecture: Eliminates solenoid valves, timers, and cycling logic—reducing failure points and enabling immediate start-up (<3 min to specification-compliant output) and seamless scalability via parallel unit integration.

Sample Compatibility & Compliance

The AYAN-5LG is validated for use with analytical instruments requiring stable, oil-free, dry nitrogen—including GC carrier gas, LC-MS nitrogen curtain gas, FTIR purging, sample preparation glove boxes, and inert atmosphere reactors. Its output meets ASTM D6673-22 requirements for nitrogen used in chromatographic applications and complies with ISO 8573-1:2010 Class 1.2.1 for particle, water, and oil content when operated with properly maintained upstream filtration. While not certified to FDA 21 CFR Part 11 out-of-the-box, its digital purity logging interface supports third-party audit-ready data export (CSV via USB) for GLP/GMP-aligned laboratories. The system is CE-marked per EN 61000-6-3 (EMC) and EN 61000-6-2 (immunity) standards.

Software & Data Management

The AYAN-5LG operates as a standalone hardware platform with embedded firmware (v2.1+), offering no proprietary software dependency. All operational parameters—including runtime hours, cumulative purity deviation history, and compressor thermal cycle logs—are stored in non-volatile memory and accessible via front-panel navigation. Optional RS-485 Modbus RTU interface (add-on module) enables integration into building management systems (BMS) or centralized lab gas monitoring platforms for remote status polling, alarm relay triggering (e.g., low-purity threshold), and predictive maintenance scheduling based on compressor duty cycles. Audit trails comply with ALCOA+ principles when exported manually, supporting traceability for internal quality reviews.

Applications

• Gas chromatography (GC) carrier and detector make-up gas
• LC-MS and GC-MS nitrogen curtain and collision gas
• Inert blanketing during solvent evaporation, lyophilization, and reaction synthesis
• FTIR and Raman spectrometer purge streams
• Calibration gas dilution systems requiring stable base nitrogen
• Small-scale packaging line nitrogen flushing (non-food-grade certification)
• Electron microscopy specimen preparation environments

FAQ

What compressed air quality is required for optimal membrane performance?
ISO 8573-1 Class 2.2.2 (≤0.1 µm particles, ≤0.1 mg/m³ oil aerosol, −40 °C pressure dew point) is recommended. Failure to meet this may accelerate membrane fouling and reduce service life.
Can the unit be upgraded to higher purity (e.g., 99.99%)?
No—the AYAN-5LG is fixed at 99.9% purity due to membrane selectivity limits. Higher purities require PSA or cryogenic systems; Anyan offers custom PSA models (AYAN-5PSA series) for such requirements.
Is the built-in compressor suitable for continuous 24/7 operation?
Yes—rated for S1 continuous duty with thermal overload protection and auto-shutdown at >95 °C winding temperature. Ambient operating temperature range: 5–35 °C.
Does the system include validation documentation for IQ/OQ protocols?
Factory test reports (flow, purity, dew point, pressure stability) are provided. Full IQ/OQ documentation packages—including calibration certificates for O₂ sensor and pressure transducers—can be supplied upon request at additional cost.
What is the expected service interval for the membrane module?
Under compliant inlet air conditions and ambient temperatures ≤30 °C, the membrane module maintains specification performance for ≥10,000 operating hours (approx. 4–5 years at 24/7 use). No scheduled replacement is required before performance drift exceeds ±0.05% purity deviation.