Anyan AYAN-DA5L Dry Air Generator
| Brand | Anyan |
|---|---|
| Origin | Zhejiang, China |
| Manufacturer Type | Authorized Distributor |
| Model | AYAN-DA5L |
| Output Flow Rate | 0–5 L/min |
| Output Pressure | 0–0.5 MPa |
| Hydrocarbon Content | < 0.1 ppm (after catalytic oxidation) |
| Dew Point | −45 °C |
| Carbon Filter Replacement Interval | Every 1000 operating hours |
| Desiccant | Indicating silica gel (blue-to-pink transition) |
| Compressor Type | Oil-free diaphragm compressor |
| Gas Storage Tank | Electropolished stainless steel with auto-drain |
| Filtration Stages | Dual-stage particulate + activated carbon + catalytic oxidation + molecular sieve (0.5 µm retention efficiency ≥99.99%) |
| Safety Features | Overpressure protection, thermal overload cutoff, low-pressure startup circuit |
Overview
The Anyan AYAN-DA5L Dry Air Generator is an engineered solution for laboratories requiring a continuous, reliable source of high-purity, ultra-dry compressed air—specifically tailored for gas chromatography (GC), GC–MS, FTIR, and other analytical instrumentation demanding stringent air quality specifications. It operates on a multi-stage purification principle: ambient air is drawn in via a dust-filtered inlet, compressed by an oil-free diaphragm compressor, cooled, and then subjected to sequential treatment—including coalescing filtration, catalytic hydrocarbon oxidation at ~400 °C, deep desiccation using indicating silica gel, and final polishing through a 3-stage molecular sieve system. This architecture ensures removal of particulates (≥99.99% retention for particles ≥0.5 µm), water vapor (dew point ≤−45 °C), hydrocarbons (<0.1 ppm total non-methane hydrocarbons), carbon monoxide, and trace oils. Unlike cylinder-based supply, the AYAN-DA5L eliminates logistical constraints, pressure decay, and contamination risks associated with aging cylinders or regulator leakage—delivering consistent flow (0–5 L/min) and pressure (0–0.5 MPa) under variable demand.
Key Features
- Oil-free diaphragm compressor with low-voltage startup circuit—extends service life and reduces thermal stress during cold starts.
- Electropolished stainless steel air reservoir with integrated automatic condensate drain—prevents rust formation and eliminates iron oxide contamination common in carbon-steel tanks.
- Dual-stage pressure regulation with overpressure safety cutoff and real-time pressure monitoring—ensures stable delivery within ±0.02 MPa tolerance across full flow range.
- Catalytic oxidation furnace (operating at ~400 °C) with high-efficiency metal catalyst—achieves sub-ppm hydrocarbon abatement without consumable reagents.
- Visual desiccant column with blue-to-pink indicating silica gel—enables immediate assessment of moisture saturation; replacement threshold clearly marked at centerline of blue capillary tube.
- Modular filtration train: pre-filter (5 µm particulate), activated carbon bed (1000 hr service life), catalytic reactor, and triple-bed molecular sieve (3 Å + 4 Å + 13X)—each stage accessible for scheduled maintenance per ISO/IEC 17025 preventive maintenance protocols.
- Acoustically damped enclosure—meets ISO 3744 noise emission standards (<52 dB(A) at 1 m), suitable for shared laboratory environments.
Sample Compatibility & Compliance
The AYAN-DA5L delivers air meeting ASTM D6216 (Standard Specification for Zero Air Used in Ambient Air Monitoring) and EPA Method TO-14/TO-15 requirements for hydrocarbon-free carrier and fuel gases. Its output satisfies the inlet air specifications of all major GC detectors—including FID, NPD, and PFPD—as well as FTIR purge gas lines and plasma-based elemental analyzers. The stainless-steel wetted path complies with USP material compatibility guidelines for pharmaceutical-grade gas systems. While not certified to ISO 8573-1 Class 0 (for absolute oil-free status), its catalytic + adsorption architecture achieves Class 1 (≤0.01 mg/m³ oil aerosol) and Class 2 (dew point ≤−40 °C) per ISO 8573-1:2010, making it suitable for GLP-compliant laboratories conducting routine QC testing on transformer insulating oil (per IEC 60567 and ASTM D3612). All pressure components conform to PED 2014/68/EU design codes.
Software & Data Management
The AYAN-DA5L is a standalone hardware system with no embedded firmware or digital interface. However, its mechanical stability and repeatable performance support full integration into regulated environments governed by FDA 21 CFR Part 11 and EU Annex 11. Users may log operational parameters—including cumulative runtime, filter replacement timestamps, dew point verification records, and pressure deviation logs—using external LIMS or ELN platforms. Maintenance history (e.g., silica gel replacement, carbon bed swap, catalyst rejuvenation) must be documented manually per GMP Annex 15 requirements. Optional analog pressure and flow outputs (0–5 V or 4–20 mA) enable connection to building management systems (BMS) for centralized utility monitoring.
Applications
- Carrier and combustion air supply for gas chromatographs (including Agilent, Thermo Fisher, Shimadzu, and PerkinElmer GC platforms).
- Purge gas for Fourier-transform infrared (FTIR) spectrometers and cavity ring-down spectroscopy (CRDS) systems.
- Zero-air generation for environmental air quality monitors (e.g., ozone analyzers, NOx chemiluminescence detectors).
- Instrument air for pneumatic actuators in automated sample introduction systems and autosamplers.
- Lab-wide compressed air backbone where oil-free, low-dew-point air is required for cleanroom-compatible instrumentation.
- Support of dissolved gas analysis (DGA) in power transformer maintenance—providing calibration-grade air for headspace sampling and GC-FID quantification of H2, CH4, C2H2, and CO in insulating oil per IEEE C57.104.
FAQ
What is the recommended maintenance schedule for the AYAN-DA5L?
Replace the activated carbon filter every 1000 operating hours; inspect and replace silica gel when >50% of the column has transitioned from blue to pink; clean the inlet particulate filter weekly (ultrasonic cleaning recommended); verify dew point annually using a calibrated chilled-mirror hygrometer.
Can the AYAN-DA5L be used with GC–MS systems requiring ultra-low hydrocarbon background?
Yes—provided the catalytic oxidizer is maintained at nominal temperature and the molecular sieve is regenerated per manufacturer instructions, it consistently delivers <0.1 ppm total hydrocarbons, satisfying typical GC–MS auxiliary air specifications.
Is the stainless steel reservoir certified for oxygen service?
No—the tank is rated for compressed air only and is not cleaned or passivated to ASTM G93 oxygen-clean standards; it must not be used with O2, O3, or oxidizing gas mixtures.
How does the thermal protection system respond to compressor overheating?
The unit incorporates a bimetallic thermal cutout that interrupts power to the compressor motor when internal temperature exceeds 95 °C; automatic recovery occurs after cooling to <60 °C, with no manual reset required.
Does the AYAN-DA5L meet ISO 8573-1:2010 Class 1:2:1 requirements?
Yes—its verified performance aligns with Class 1 (solid particles), Class 2 (water), and Class 1 (oil) per ISO 8573-1:2010 when operated within specified ambient conditions (15–30 °C, <80% RH) and maintained per documentation.
