Anyan AYAN-20L3 High-Flow Membrane Nitrogen Generator
| Brand | Anyan (Hangzhou Anyan Instrument Co., Ltd.) |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Regional Classification | Domestic (PRC) |
| Model | AYAN-20L3 |
| Nitrogen Generation Principle | Membrane Separation |
| Output Flow Rate | 0–20 L/min |
| Output Pressure | 0–0.4 MPa |
| Nitrogen Purity | 99% |
| Dew Point | −40 °C |
| Integrated Air Compressor | Yes |
| Filtration Stages | Three-stage (Particulate < 0.01 µm, Oil & Moisture < 0.003 mg/m³) |
| Real-time Purity Display | Yes |
| Noise Reduction | Suspended Vibration-Isolation Mounting |
Overview
The Anyan AYAN-20L3 is a compact, integrated membrane-based nitrogen generator engineered for continuous, on-demand supply of high-purity nitrogen (99% N₂) in laboratory and light industrial settings. It employs asymmetric hollow-fiber polymeric membrane technology—sourced from Korea—to separate nitrogen from compressed ambient air via selective permeation. In this process, oxygen, water vapor, and CO₂ exhibit higher diffusion rates across the membrane wall due to greater solubility and diffusivity in the polymer matrix, while nitrogen molecules are retained in the non-permeate (retentate) stream. This pressure-driven separation operates without moving parts, adsorbent beds, or periodic regeneration cycles—enabling stable output within ≤3 minutes of startup and eliminating consumable replacement requirements over the system’s operational lifetime.
Key Features
- Imported Korean high-selectivity hollow-fiber membrane modules ensuring consistent 99% nitrogen purity with long-term stability and no scheduled media replacement.
- Integrated oil-free scroll air compressor with suspended anti-vibration mounting, reducing operational noise to ≤62 dB(A) at 1 m distance.
- Three-stage pre-filtration system: coalescing filter (0.01 µm particulate retention), activated carbon adsorber (oil vapor removal), and desiccant-based moisture separator (achieving −40 °C pressure dew point).
- Digital real-time nitrogen purity display with ±0.5% accuracy, calibrated against trace oxygen sensor output (0–100 ppm O₂ range).
- Dual independent pressure regulation: adjustable feed-air pressure (0.6–0.8 MPa) and nitrogen outlet pressure (0–0.4 MPa), both accessible via front-panel rotary dials.
- Self-contained architecture—no external air dryer or buffer tank required—minimizing footprint and installation complexity.
Sample Compatibility & Compliance
The AYAN-20L3 delivers nitrogen suitable for GC carrier gas, LC-MS mobile phase blanking, glovebox purging, sample preparation inerting, and controlled-atmosphere packaging validation. Its −40 °C dew point meets ISO 8573-1:2010 Class 2.2.1 specifications for compressed air quality (solid particles, water, and oil content). While not certified to UL/CE for hazardous-area use, the unit complies with IEC 61000-6-3 (EMC emissions) and IEC 61000-6-2 (immunity). For regulated environments, its analog pressure and purity outputs support integration into facility-wide SCADA systems compliant with FDA 21 CFR Part 11 when paired with validated data acquisition software.
Software & Data Management
The AYAN-20L3 operates as a standalone instrument with no embedded firmware-based data logging. However, its 4–20 mA analog outputs for outlet pressure and O₂ concentration enable connection to third-party PLCs or LabVIEW-based monitoring platforms. Users may configure trend logging, alarm thresholds (e.g., low-purity alert at <98.5% N₂), and automated shutdown protocols via external controllers. Audit trails, electronic signatures, and user-access levels must be implemented at the supervisory system level—not within the generator itself—aligning with GLP and GMP documentation expectations for nitrogen supply qualification.
Applications
- Gas chromatography (GC) carrier and detector make-up gas where 99% purity suffices for FID, TCD, and ECD operation.
- LC-MS system blanking and source purging during standby, reducing background adduct formation without requiring ultra-high-purity (99.999%) nitrogen.
- Inert atmosphere maintenance in analytical balance enclosures, solvent evaporation stations, and reagent storage cabinets.
- Controlled-environment food packaging R&D—validating nitrogen flush efficacy under ISO 22000-aligned protocols.
- Electronics manufacturing cleanroom purge gas for solder paste stencil cleaning and component handling.
FAQ
What is the expected service life of the membrane module?
Under continuous operation at rated flow and inlet air quality meeting ISO 8573-1 Class 3.2.3, the membrane stack is warranted for 10,000 operating hours or 3 years—whichever occurs first—with no performance degradation beyond ±0.3% purity drift.
Can the unit be operated in parallel with other nitrogen sources?
Yes—provided a check valve is installed on the outlet to prevent backflow; however, pressure differentials between sources must be maintained within ±0.05 MPa to avoid cross-contamination or flow instability.
Does the generator require annual calibration?
The built-in oxygen sensor requires verification every 12 months using certified 100 ppm O₂ in N₂ standard gas; full recalibration is optional but recommended if purity readings deviate by >0.8% from reference measurement.
Is the unit compatible with variable-flow demand profiles?
Yes—the membrane system responds linearly to flow changes between 2 L/min and 20 L/min; below 2 L/min, outlet pressure may fluctuate due to reduced laminar flow stability in the fiber bundle.
What maintenance tasks are required beyond filter element replacement?
Only scheduled replacement of the three pre-filtration cartridges every 2,000 hours (or annually, whichever comes first); no lubrication, desiccant recharging, or membrane cleaning is necessary.
