Anyan AYAN-70LB Pressure Swing Adsorption (PSA) Nitrogen Generator

Overview

The Anyan AYAN-70LB is a laboratory- and pilot-scale pressure swing adsorption (PSA) nitrogen generator engineered for continuous, on-demand production of high-purity nitrogen gas from ambient air. It employs carbon molecular sieve (CMS) technology—a physical separation process relying on differential diffusion kinetics and equilibrium adsorption selectivity between oxygen and nitrogen molecules under variable pressure conditions. In the PSA cycle, compressed air is passed through twin CMS-filled adsorption towers operating in alternating phases: one tower adsorbs oxygen, CO₂, and moisture while delivering nitrogen-enriched gas; the other undergoes depressurization and purging to regenerate the CMS bed. This cyclic operation ensures stable output with no consumables beyond electricity and maintenance-filter elements. The system integrates pre-treatment stages—including coalescing filtration, refrigerated drying, and fine particulate/oil removal—to protect CMS integrity and extend service life. Designed for integration into analytical instrumentation (e.g., LC-MS, GC carrier gas supply), inert blanketing, and materials testing environments, the AYAN-70LB complies with general industrial safety and electromagnetic compatibility standards (IEC 61000-6-2/6-4) and supports routine GLP-aligned operational documentation.

Key Features

• Modular dual-tower PSA architecture enabling uninterrupted nitrogen delivery during regeneration cycles
• High-efficiency carbon molecular sieve with calibrated micropore distribution (0.28–0.38 nm) optimized for kinetic separation of O₂ and N₂
• Integrated air pretreatment train: three-stage filtration (coalescing + activated carbon + ultrafine), refrigerated dryer (dew point ≤−20 °C pre-PSA), and precision pressure regulation
• Onboard electrochemical nitrogen purity analyzer with real-time digital display and programmable alarm thresholds (99% to 99.999% selectable at commissioning)
• Stainless steel nitrogen buffer tank with pressure relief valve and ASME-compliant design basis
• Industrial-grade solenoid valves and pneumatic actuators rated for ≥1 million switching cycles; all critical valves are imported components meeting ISO 15407-2 specifications
• Intuitive local HMI with data logging capability (time-stamped flow, pressure, purity, and temperature parameters)

Sample Compatibility & Compliance

The AYAN-70LB generates nitrogen suitable for applications requiring Grade 4 (99.99%) or Grade 5 (99.999%) purity per ISO 8573-1:2010 Class 2.2.2 (solid particles, water, oil). It meets typical requirements for carrier gas in gas chromatography (ASTM D3612 Annex A1), purge gas in thermal desorption systems, and inert atmosphere control in glove boxes or reaction vessels. While not certified to FDA 21 CFR Part 11 out-of-the-box, the system’s audit trail functionality (via optional RS485/Modbus RTU interface) supports configuration for regulated environments when paired with validated third-party SCADA software. All electrical components conform to CE marking directives (EMC Directive 2014/30/EU and Low Voltage Directive 2014/35/EU). The unit operates within ambient conditions defined by IEC 60721-3-3 Class 3K3 (temperature/humidity) and is rated IP20 for indoor laboratory use.

Software & Data Management

The built-in controller provides local monitoring via a 5.7-inch TFT LCD touchscreen interface supporting multilingual menus (English default). Logged parameters—including nitrogen flow (L/min), outlet pressure (MPa), purity (% N₂), dew point (°C), and CMS tower status—are stored internally for up to 30 days at 1-minute intervals. Data export is available via USB flash drive in CSV format. For networked deployment, an optional RS485 port enables integration with LabVIEW, Ignition, or DeltaV systems using standard Modbus RTU protocol. Remote diagnostics and firmware updates may be performed via secure SSH connection when connected to a local LAN. All operational events—including filter replacement alerts, low-purity alarms, and tower switch logs—are timestamped and retained for traceability in quality assurance workflows.

Applications

• Carrier and make-up gas supply for GC, GC-MS, and TOF-MS systems
• Inert gas overlay in solvent evaporation (e.g., rotary evaporators, nitrogen blow-down concentrators)
• Blanketing of sensitive reagents, catalysts, or hygroscopic materials during synthesis or storage
• Leak testing and pressure decay validation in sealed enclosures
• Controlled-atmosphere annealing and sintering in materials science laboratories
• Calibration gas dilution systems requiring stable, low-oxygen background gas

FAQ

What is the expected service life of the carbon molecular sieve under normal operating conditions?
With proper air pretreatment and adherence to scheduled maintenance (filter replacements every 6–12 months depending on inlet air quality), CMS beds typically maintain >95% of initial separation efficiency for 3–5 years. Regeneration performance is monitored via purity drift and pressure differential across towers.

Can the AYAN-70LB be configured for 99.999% nitrogen purity without hardware modification?
Yes—purity level is selected at time of order and implemented via CMS bed volume optimization, cycle timing calibration, and purge ratio adjustment. No field retrofitting is required for specified purity grades.

Is external cooling water required for the refrigerated dryer?
No—the integrated refrigerant-based dryer is self-contained and air-cooled. Ambient airflow clearance of ≥300 mm on all sides is recommended for thermal management.

Does the system include validation documentation for IQ/OQ protocols?
Factory acceptance test (FAT) reports and as-built P&ID diagrams are provided. Site-specific IQ/OQ execution requires user-defined protocols aligned with internal quality systems; Anyan supplies technical support and calibration certificates for onboard sensors upon request.