Junray ZR-5218 Zero Air Generator
| Brand | Junray |
|---|---|
| Origin | Shandong, China |
| Manufacturer Type | Direct Manufacturer |
| Country of Origin | Domestic (China) |
| Model | ZR-5218 |
| Pricing | Upon Request |
Overview
The Junray ZR-5218 Zero Air Generator is an engineered solution for the on-site production of ultra-pure, hydrocarbon-free zero air—defined as air with total hydrocarbon content < 0.1 ppm (as methane equivalent), CO < 0.1 ppm, NOₓ < 0.5 ppb, SO₂ < 0.5 ppb, and particulate matter 350 °C), followed by dual-bed desiccant and chemical scrubbers (activated carbon + molecular sieve) to eliminate residual moisture, CO₂, NOₓ, SO₂, ozone, and volatile organic compounds. The system delivers stable, continuous zero air meeting EPA Method TO-14/TO-15, ISO 8573-1 Class 1:1:1 (for particles, water, oil), and ASTM D6216 specifications—making it suitable for critical calibration and analytical support applications in regulated environments.
Key Features
- Stable output flow up to 20 L/min at adjustable pressure (0–100 psi / 0–6.9 bar), with flow regulation accuracy ±1% FS across full range
- Integrated dew point monitoring with audible/visual alarm triggered at > –40 °C (typical operating dew point: –70 °C to –80 °C)
- Real-time system diagnostics including pressure drop across filters, catalyst bed temperature, and scrubber saturation indicators
- Fail-safe shutdown logic activated upon critical fault detection (e.g., overtemperature, low airflow, filter bypass condition)
- Modular consumables design: pre-filter, coalescer, catalyst cartridge, and dual-stage adsorption beds are field-replaceable with tool-free access
- Robust stainless steel and anodized aluminum construction; IP54-rated enclosure for laboratory and industrial floor deployment
Sample Compatibility & Compliance
The ZR-5218 is compatible with all standard 1/4″ NPT or 6 mm push-to-connect gas fittings and integrates seamlessly into existing gas distribution networks. Its output meets the zero air purity requirements for calibrating federal reference method (FRM) and federal equivalent method (FEM) ambient air monitors (e.g., Thermo Fisher 42i, Teledyne API 400 series), as well as for GC-FID, GC-TCD, and online process analyzers requiring inert carrier/combustion support gas. The unit complies with GB/T 33622–2017 (Chinese national standard for zero air generators), and its performance validation protocol aligns with ISO/IEC 17025:2017 clause 5.9 (method validation) and USP for residual solvent analysis support gases. Optional third-party certification reports (e.g., SGS or CNAS-accredited testing) are available upon request for GLP/GMP audit readiness.
Software & Data Management
While the ZR-5218 operates as a standalone hardware system without embedded firmware or touchscreen interface, it supports analog 4–20 mA output signals for dew point, outlet pressure, and catalyst temperature—enabling integration into building management systems (BMS) or SCADA platforms. A dedicated calibration log template (Excel-based) is provided for routine verification per ISO 17025 Annex A.3, including scheduled checks for hydrocarbon breakthrough (via portable FID analyzer), dew point drift, and flow consistency. All maintenance records—including consumable replacement dates, catalyst regeneration cycles, and alarm event timestamps—are retained per FDA 21 CFR Part 11 principles when entered into validated electronic lab notebooks (ELN) or LIMS.
Applications
- Ambient and indoor air quality monitoring: zero-point calibration of chemiluminescence NOₓ analyzers, UV fluorescence SO₂ analyzers, and beta-attenuation PM monitors
- Gas chromatography: carrier gas for FID and TCD detectors; makeup and combustion air for FID operation
- Environmental laboratory QA/QC: preparation of certified zero air standards for method blanks and instrument linearity verification
- Industrial hygiene and occupational safety: calibration of portable multi-gas detectors (CO, H₂S, O₂, combustibles) per OSHA 29 CFR 1910.120
- Research-grade spectroscopy: purge gas for FTIR sample compartments and laser cavity environments requiring particulate- and hydrocarbon-free atmosphere
FAQ
What is the expected service life of the catalyst cartridge under continuous 24/7 operation?
With typical ambient inlet air (≤ 70% RH, ≤ 0.5 ppm THC), the catalytic converter maintains specified conversion efficiency for ≥ 12 months; lifetime extends to 18–24 months with optional inlet air pre-drying.
Does the ZR-5218 require external compressed air, and what are the supply specifications?
Yes—it requires clean, oil-free compressed air at 80–120 psi (5.5–8.3 bar) and ≤ 5 ppm oil aerosol; a recommended upstream coalescing filter (0.01 µm rating) is advised if using general-purpose compressors.
Can the unit be validated for use in ISO 17025-accredited laboratories?
Yes—Junray provides a traceable validation package including factory test reports, uncertainty budgets for flow and dew point, and a customizable IQ/OQ protocol aligned with ISO/IEC 17025:2017 Annex A.3.
Is remote monitoring capability available?
Standard analog outputs (4–20 mA) enable basic remote status monitoring; optional RS-485 Modbus RTU interface module is available for digital integration with PLCs or centralized control systems.
