Anyan AYAN-80L High-Purity Nitrogen Generator
| Brand | Anyan Instruments (Hangzhou) |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Regional Category | Domestic (PRC) |
| Model | AYAN-80L1 |
| Price Range | USD 5,700 – 9,900 (FOB China) |
| Nitrogen Generation Principle | Pressure Swing Adsorption (PSA) |
| Output Flow Rate | 80 L/min |
| Output Pressure | 0–0.6 MPa |
| Nitrogen Purity | 99.9% (v/v) |
| Dew Point | −40 °C |
| Adsorbent | Carbon Molecular Sieve (CMS) |
| Air Inlet Requirement | Oil-free, dried compressed air (ISO 8573-1 Class 2:2:2 recommended) |
Overview
The Anyan AYAN-80L is a laboratory- and pilot-scale nitrogen generator engineered for continuous, on-demand production of high-purity nitrogen gas (99.9% N₂) via pressure swing adsorption (PSA) technology. It operates by selectively adsorbing oxygen, moisture, and trace hydrocarbons from compressed air using high-efficiency carbon molecular sieve (CMS) beds under controlled pressure cycles. During the high-pressure adsorption phase, O₂ and CO₂ diffuse rapidly into CMS micropores due to kinetic diameter differences (O₂: 0.346 nm; N₂: 0.364 nm), while nitrogen remains predominantly in the gas phase and is collected as product gas. The system alternates between two CMS beds—one adsorbing while the other undergoes depressurization and purging—to ensure uninterrupted nitrogen delivery. Designed for integration into analytical instrumentation (e.g., LC-MS, GC carrier gas), inerting, glovebox purging, and materials testing environments, the AYAN-80L delivers stable flow and purity without reliance on liquid nitrogen or high-pressure cylinders.
Key Features
- Stable 80 L/min nitrogen output at adjustable pressure (0–0.6 MPa), compatible with standard lab gas manifolds and instrument inlets
- Dual-bed PSA architecture with automatic valve sequencing for >99.9% volumetric nitrogen purity (measured by integrated paramagnetic O₂ sensor)
- Integrated air pre-treatment module: coalescing filter (0.01 µm), refrigerated dryer (dew point ≤ −40 °C), and activated carbon adsorber for oil vapor removal—meeting ISO 8573-1 Class 2:2:2 air quality requirements
- Real-time monitoring of outlet O₂ concentration, system pressure, flow rate, and CMS bed status via 5-inch TFT touchscreen HMI
- Robust pneumatic control system with stainless-steel solenoid valves rated for ≥1 million cycles; redundant pressure relief and fail-safe venting
- Modular CMS cartridge design enabling field replacement without system disassembly or vacuum baking
Sample Compatibility & Compliance
The AYAN-80L is intended for use with clean, oil-free, desiccated compressed air feed (recommended inlet pressure: 0.7–1.0 MPa). It is not suitable for direct connection to oil-lubricated compressors without upstream coalescing and adsorption filtration. The unit complies with CE marking requirements (2014/30/EU EMC Directive and 2014/35/EU Low Voltage Directive) and conforms to IEC 61000-6-2/6-4 immunity/emission standards. While not certified to ISO 8573-7 for microbial content, its integrated filtration ensures particulate removal down to 0.01 µm and hydrocarbon adsorption <0.003 mg/m³—sufficient for most GLP-compliant analytical applications. For FDA-regulated environments (e.g., pharmaceutical QC labs), users must validate nitrogen quality per USP and maintain audit-ready logs of CMS replacement, filter changes, and O₂ sensor calibration (traceable to NIST-certified reference gases).
Software & Data Management
The embedded controller supports data logging of critical parameters (O₂ ppm, flow, pressure, temperature, runtime hours) at user-defined intervals (1 sec–60 min). Logs are exportable via USB 2.0 to CSV format for trend analysis in Excel or LIMS integration. Optional RS-485 Modbus RTU interface enables remote monitoring and alarm triggering (e.g., high O₂ alert, low pressure, CMS saturation warning) within SCADA or building management systems. All calibration events—including O₂ sensor zero/span adjustments—are timestamped and stored with operator ID fields to satisfy 21 CFR Part 11 electronic record requirements when paired with validated third-party software.
Applications
- Carrier and purge gas for gas chromatography (GC), GC-MS, and thermal desorption systems
- Inert atmosphere generation for gloveboxes, solvent evaporation stations, and battery electrode drying ovens
- Blanketing and sparging in pharmaceutical formulation and stability testing chambers
- Reference gas supply for FTIR, Raman, and XRD sample environments requiring oxygen-free conditions
- On-site nitrogen for laser cutting assist gas qualification and metallographic sample preparation
FAQ
What causes declining nitrogen purity over time?
Primary causes include CMS degradation due to oil carryover (from inadequate air pre-filtration), moisture breakthrough, or mechanical attrition leading to fines generation. Regular replacement of coalescing filters, desiccant dryers, and CMS cartridges per maintenance schedule mitigates this.
Why does nitrogen purity drop when flow exceeds 80 L/min?
Exceeding rated flow reduces residence time in the CMS bed, limiting O₂ adsorption kinetics and increasing breakthrough. The system includes flow-limiting hardware and software interlocks to prevent sustained over-capacity operation.
How often should the O₂ sensor be calibrated?
Calibration is recommended every 90 days using certified zero gas (99.999% N₂) and span gas (0.1% O₂ in N₂), or after any CMS replacement or extended shutdown (>72 hrs).
Can the AYAN-80L operate unattended for 24/7 duty cycles?
Yes—designed for continuous operation with thermal overload protection, automatic condensate drainage, and predictive maintenance alerts. Annual CMS replacement and quarterly filter servicing are required to sustain specification compliance.
