Anyan AYAN-1L Membrane Nitrogen Generator

Overview

The Anyan AYAN-1L Membrane Nitrogen Generator is an on-site, continuous-flow nitrogen supply system engineered for laboratory and light industrial applications requiring consistent, high-purity nitrogen gas. It employs hollow-fiber membrane separation technology—based on the differential permeation rates of oxygen, water vapor, and carbon dioxide through polymeric membranes—to selectively remove these components from compressed air, yielding nitrogen-enriched gas with ≥99% purity (v/v). Unlike cryogenic or pressure swing adsorption (PSA) systems, membrane generators offer compact footprint, silent operation, zero consumables (e.g., no molecular sieve replacement), and inherently stable output under varying demand. The unit integrates a built-in oil-free air compressor, multi-stage air pretreatment (coalescing filter, desiccant dryer, and particulate filtration), and precision pressure regulation to deliver dry, clean nitrogen at a constant flow rate of 1 L/min and adjustable pressure up to 0.4 MPa. Its −40 °C pressure dew point ensures compatibility with moisture-sensitive analytical instruments—including gas chromatographs (GC), electron microscopes, and glove boxes—without risk of condensation or oxidation.

Key Features

• Integrated oil-free scroll air compressor with thermal overload protection and variable-speed control to match real-time nitrogen demand, reducing mechanical stress and extending service life.
• Three-stage air purification system: 0.01 µm coalescing filter removes aerosols and oil vapors; regenerative desiccant dryer achieves −40 °C dew point; final 0.1 µm particulate filter ensures ISO Class 4 air quality prior to membrane module entry.
• Hollow-fiber membrane module constructed from asymmetric polysulfone fibers with high O₂/N₂ selectivity (>6.5) and long-term flux stability under continuous operation.
• Intelligent PLC-based controller with LCD interface supporting real-time monitoring of outlet pressure, flow rate, dew point status, and system alarms.
• Automatic nitrogen quality safeguard: non-compliant gas (<99% purity) is routed to vent via solenoid-controlled bypass, preventing contamination of downstream equipment.
• Compact benchtop design (W380 × D320 × H620 mm) with casters and integrated cable management—optimized for limited lab space without external utilities beyond standard 220 V / 50 Hz power.

Sample Compatibility & Compliance

The AYAN-1L is compatible with all standard GC carrier gas inlets (including Agilent, Thermo Fisher, Shimadzu, and PerkinElmer platforms) and supports both carrier and make-up (tail-blown) nitrogen applications. It meets ISO 8573-1:2010 Class 4:2:2 for compressed air quality upstream of the membrane module and delivers nitrogen compliant with ASTM D6349–22 requirements for GC carrier gas purity. While not certified to FDA 21 CFR Part 11 out-of-the-box, its PLC controller supports audit-trail-enabled data logging when paired with optional RS485/Modbus RTU or Ethernet/IP interfaces—facilitating integration into GLP/GMP environments where instrument qualification (IQ/OQ/PQ) and traceable gas delivery records are required.

Software & Data Management

The embedded controller provides local parameter configuration (flow setpoint, pressure limit, auto-shutdown delay) and stores 30 days of operational logs—including runtime hours, compressor cycles, alarm history, and purity verification timestamps. Optional firmware upgrade enables Modbus TCP communication for centralized monitoring via LabVantage, Empower, or custom SCADA systems. No proprietary software installation is required; configuration and diagnostics are accessible via web browser using the unit’s static IP address. All logged data export as CSV files for archival or regulatory submission.

Applications

• Gas Chromatography: Reliable carrier and makeup gas supply for capillary column analysis, eliminating cylinder handling, pressure fluctuations, and purity inconsistencies inherent in bulk gas delivery.
• Electron Microscopy: Inert atmosphere maintenance in SEM/TEM sample chambers and preparation tools to prevent beam-induced oxidation.
• Pharmaceutical Stability Testing: Nitrogen blanketing of accelerated stability chambers per ICH Q1 guidelines to minimize oxidative degradation pathways.
• Food & Beverage Packaging: On-demand nitrogen for modified atmosphere packaging (MAP) lines, validated for use with sterile-grade 0.2 µm inline filters (optional).
• Materials Science Labs: Controlled-atmosphere sintering, annealing, and thin-film deposition where precise, low-moisture inert gas is critical.
• Chemical Synthesis: Blanketing reactors, purging transfer lines, and inerting distillation setups per OSHA Process Safety Management (PSM) protocols.

FAQ

What is the expected service life of the membrane module?
Under continuous operation with properly maintained inlet air quality (≤0.01 ppm oil, ≤−40 °C dew point), the hollow-fiber membrane exhibits >15,000 hours of functional stability—typically exceeding five years with routine filter replacement every 6–12 months.
Does the generator require external cooling or ventilation?
No. The unit operates passively cooled via convection; ambient temperature must remain between 5–35 °C with ≥15 cm clearance on all sides for airflow.
Can output pressure be regulated independently of flow rate?
Yes. A precision back-pressure regulator maintains setpoint pressure (0–0.4 MPa) regardless of downstream flow variations within the 0–1 L/min range.
Is calibration traceable to NIST or other national standards?
Built-in electrochemical oxygen sensor is factory-calibrated against certified gas mixtures; users may perform field verification using ASTM D6349 reference cylinders—full calibration certificate available upon request.
What maintenance is required annually?
Annual tasks include replacing coalescing and particulate filters, recharging desiccant media, inspecting compressor intake silencer, and validating outlet purity/dew point with external analyzers.