Anyan AYAN-25LG Membrane-Based Nitrogen Generator
| Brand | Anyan |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Country of Origin | China |
| Model | AYAN-25LG |
| Nitrogen Generation Principle | Membrane Separation |
| Output Flow Rate | 25 L/min |
| Output Pressure Range | 0–0.4 MPa |
| Nitrogen Purity | 99% |
| Dew Point | −40 °C |
| Integrated Air Compressor | Yes |
| Filtration Grade | 0.01 µm particles, 0.003 mg/m³ oil aerosol |
| Onboard Purity Monitoring | Yes |
| Noise Level | <60 dB(A) |
| Startup Time | ≤3 min |
| Compliance Reference | HJL Standard “Energy-Saving Carbon Molecular Sieve Nitrogen Generator” |
| Operating Ambient | −10 to 45 °C, 35–90% RH |
Overview
The Anyan AYAN-25LG Membrane-Based Nitrogen Generator is an engineered solution for continuous, on-demand nitrogen supply in laboratory and light industrial environments. It employs polymeric hollow-fiber membrane separation technology—originally developed and refined in South Korea—to selectively separate nitrogen from compressed ambient air. This process leverages differences in gas solubility and diffusivity across asymmetric membranes: oxygen, water vapor, and CO₂ permeate faster through the membrane wall under pressure, while nitrogen molecules are retained in the non-permeate stream. The result is a stable output of nitrogen with ≥99% purity (v/v), a dew point of −40 °C, and zero requirement for consumables such as carbon molecular sieves or catalysts. Unlike pressure swing adsorption (PSA) systems, the AYAN-25LG operates without cyclic valves, eliminating mechanical wear, reducing maintenance intervals, and enabling full operational readiness within three minutes of power-on. Its integrated oil-free scroll compressor, acoustic insulation design, and compact footprint make it suitable for benchtop or floor-mounted deployment in QC labs, glove boxes, chromatography support areas, and inert-atmosphere sample preparation stations.
Key Features
- South Korean-sourced high-selectivity hollow-fiber membrane module, rated for >15,000 hours of continuous operation without performance degradation or replacement
- Integrated multi-stage air purification: coalescing pre-filter (0.1 µm), activated carbon adsorber (oil & hydrocarbon removal), and ultrafine particulate filter (≤0.01 µm, ≤0.003 mg/m³ oil aerosol)
- Dual independent pressure regulation system: one for upstream air compression (0.6–0.8 MPa), another for downstream nitrogen delivery (0–0.4 MPa), both adjustable via calibrated needle valves
- Real-time digital nitrogen purity display (electrochemical sensor-based), calibrated against certified reference gas, with ±0.5% accuracy across 95–99.5% range
- Self-contained oil-free scroll air compressor with vibration-dampened mounting and acoustic enclosure, achieving <60 dB(A) at 1 m distance
- No moving parts in the separation stage; no scheduled regeneration cycles, no desiccant or sieve bed replacement, and no purge gas loss
Sample Compatibility & Compliance
The AYAN-25LG delivers nitrogen meeting ISO 8573-1:2010 Class 2:2:2 specifications for particulate, water, and oil content—making it compatible with GC carrier gas requirements (per ASTM D6299 and USP ), LC-MS mobile phase blanking, and inerting of hygroscopic or oxidation-sensitive reagents. While not certified to ISO/IEC 17025 or FDA 21 CFR Part 11 out-of-the-box, its analog pressure gauges, digital purity readout, and fixed-flow architecture support GLP-compliant recordkeeping when paired with external data loggers. All electrical components comply with CE marking directives (EMC 2014/30/EU, LVD 2014/35/EU). Mechanical construction adheres to the HJL enterprise standard for energy-efficient membrane nitrogen generators, including pressure vessel integrity testing per GB/T 150.1–2011 and functional validation of safety relief valves prior to shipment.
Software & Data Management
The AYAN-25LG is a standalone hardware system with no embedded microcontroller or network interface. All operational parameters—including inlet pressure, outlet pressure, and real-time purity—are displayed via front-panel analog gauges and a 3-digit LED screen. For integration into automated lab environments, optional analog 4–20 mA outputs (available upon request) enable connection to PLCs or SCADA systems for remote monitoring of purity and flow status. Audit-ready documentation—including factory calibration certificates, pressure test reports, and filtration efficiency validation summaries—is provided with each unit. Users are advised to maintain manual logs of daily startup checks, purity verification (using traceable N₂ standards), and filter service dates to satisfy internal QA protocols and external audit requirements.
Applications
- Carrier gas supply for gas chromatography (GC and GC-MS), particularly where consistent low-oxygen, low-moisture nitrogen is required for detector stability and column longevity
- Inert atmosphere generation for glove boxes, solvent dispensing systems, and reaction vessels handling air-sensitive organometallics or lithium reagents
- Blanketing and purging during sample storage, lyophilization, and headspace analysis preparation
- Instrument purge gas for FTIR, XRD, and SEM sample chambers to minimize atmospheric interference
- Quality control laboratories requiring reliable, low-maintenance nitrogen for packaging integrity testing (e.g., residual oxygen analysis in pharmaceutical blister packs)
FAQ
What is the expected service life of the membrane module?
The South Korean hollow-fiber membrane is rated for ≥15,000 hours of continuous operation under specified inlet air quality (ISO 8573-1 Class 2:2:2). Lifetime is extended by adherence to recommended filter replacement intervals (every 1,500–2,000 operating hours).
Does this generator require external compressed air?
No—the AYAN-25LG includes a built-in oil-free scroll compressor and requires only a standard 220 V AC power supply.
Can output pressure be adjusted independently of flow rate?
Yes—dual-stage pressure regulation allows precise control of both feed air pressure (to optimize membrane flux) and final nitrogen delivery pressure (to match instrument inlet requirements), without affecting nominal 25 L/min flow capacity.
Is the nitrogen purity reading traceable to national standards?
The onboard electrochemical sensor is factory-calibrated using NIST-traceable 99.0% and 99.5% nitrogen standards; users may perform field verification with portable paramagnetic analyzers compliant with ISO 8573-7.
What ambient conditions are required for stable operation?
Ambient temperature must remain between −10 °C and 45 °C, with relative humidity 35–90% non-condensing; installation location must be free of oil mist, chlorine, sulfur compounds, and other corrosive gases.
