Anyan AYAN-20L Laser Cutting–Optimized PSA Nitrogen Generator

Overview

The Anyan AYAN-20L is a dedicated pressure swing adsorption (PSA) nitrogen generator engineered for continuous, on-site nitrogen supply in industrial laser cutting applications. It operates by separating nitrogen from ambient air using carbon molecular sieve (CMS) technology under ambient temperature and low-pressure conditions. Unlike cryogenic or membrane-based systems, PSA leverages the differential diffusion kinetics of oxygen and nitrogen molecules across CMS pores: oxygen—smaller kinetic diameter (≈0.346 nm)—adsorbs rapidly into the micropores, while nitrogen—larger kinetic diameter (≈0.364 nm)—remains predominantly in the gas phase, enabling high-purity nitrogen enrichment. The system employs dual-bed parallel adsorption–regeneration cycles with an average cycle time of approximately 120 seconds, ensuring uninterrupted nitrogen delivery with minimal pressure fluctuation. Designed for integration into CNC fiber laser workstations, it eliminates reliance on high-pressure nitrogen cylinders, reducing operational downtime, handling hazards, and long-term consumable costs.

Key Features

• Stable 20 L/min nitrogen output at up to 0.6 MPa, compliant with ISO 8573-1:2010 Class 2.2.1 for compressed air quality upstream of the PSA unit
• Consistent 99.9% v/v nitrogen purity, verified in real time via integrated electrochemical nitrogen analyser with digital readout and automatic purge logic
• Dew point maintained at ≤ −40 °C (ISO 8573-1 Class 3), ensuring moisture-free gas delivery critical for preventing lens contamination and oxidation during high-power laser processing
• Multi-stage pre-treatment train: coalescing filter (0.01 µm, 99.999% oil aerosol removal), refrigerated dryer (dew point ≤ +3 °C), and integrated high-efficiency particulate/activated carbon polishing filter prior to CMS beds
• Robust CMS bed configuration with pneumatic cylinder-based tower compression mechanism—designed to minimize CMS attrition and prevent fluidization during pressure cycling
• Front-panel HMI with operational status indicators, pressure trend logging, maintenance alerts (e.g., filter saturation, desiccant life), and manual/auto mode selection

Sample Compatibility & Compliance

The AYAN-20L is compatible with standard industrial laser cutting platforms requiring inert assist gas—including 1–6 kW fiber lasers used for stainless steel, aluminum, and titanium sheet processing. Its output meets ASTM D6350-20 requirements for nitrogen used in metal laser cutting, particularly regarding hydrocarbon content (<0.1 ppmv) and particulate load (<1 mg/m³). While not certified to FDA 21 CFR Part 11 or ISO 13485, its mechanical design and documentation support GLP/GMP-aligned validation protocols when deployed in regulated manufacturing environments. All wetted materials—including stainless steel piping, brass solenoid valves, and fluoropolymer-sealed regulators—comply with USP material compatibility standards for non-pharmaceutical industrial gas systems.

Software & Data Management

The unit features embedded firmware with local data logging (up to 30 days of timestamped pressure, flow, purity, and dew point values) stored in non-volatile memory. Export is supported via USB-C interface in CSV format for traceability and QA reporting. Optional RS-485 Modbus RTU interface enables integration into SCADA or MES platforms for centralized monitoring. Audit trail functionality records all operator-initiated events (e.g., manual purge activation, alarm acknowledgements), supporting internal compliance reviews. No cloud connectivity or remote access capabilities are included—ensuring network isolation per IEC 62443-3-3 Level 1 security guidelines.

Applications

• High-precision fiber laser cutting of reflective metals where oxygen-free assist gas prevents edge oxidation and improves cut squareness
• Automated sheet metal fabrication lines requiring uninterrupted nitrogen supply across multi-shift operations
• R&D laser processing labs evaluating new alloys or surface treatments under controlled inert atmospheres
• On-site nitrogen sourcing for plasma-assisted cutting hybrid systems operating below 0.5 MPa backpressure
• Backup or primary nitrogen source for CNC laser systems previously dependent on cylinder banks or liquid dewars

FAQ

What maintenance intervals are recommended for optimal CMS longevity?
Filter elements (coalescing, activated carbon, particulate) require replacement every 2,000–3,000 operating hours; refrigerated dryer desiccant every 12 months. CMS lifetime is typically 3–5 years under ISO 8573-1 Class 2-compliant inlet air conditions.
Can the AYAN-20L be installed outdoors?
No. It must be installed indoors within an ambient temperature range of 5–40 °C and relative humidity ≤80% non-condensing, with adequate ventilation to dissipate heat from the air dryer and compressor intercooler.
Is nitrogen purity affected by ambient temperature fluctuations?
Minimal impact is observed within the specified operating range; however, sustained inlet air temperatures above 35 °C may reduce CMS adsorption selectivity, triggering automatic purge until purity stabilizes.
Does the system support integration with building management systems (BMS)?
Yes—via optional Modbus RTU over RS-485, enabling remote start/stop, alarm status polling, and real-time purity/flow telemetry.
What safety certifications does the unit carry?
It complies with CE marking requirements under the Machinery Directive 2006/42/EC and Electromagnetic Compatibility Directive 2014/30/EU. No ATEX or UL certification is provided; installation in hazardous locations requires third-party assessment.