Jiayuan NG1903 High-Purity Nitrogen Generator
| Brand | Jiayuan |
|---|---|
| Origin | Beijing, China |
| Model | NG1903 |
| Nitrogen Purity | 99.999% (O₂ < 3 ppm, Dew Point: −56 °C) |
| Flow Rate | 0–300 mL/min |
| Output Pressure | 0.4 MPa |
| Pressure Stability | ±0.003 MPa |
| Power Supply | 220 V ±10%, 50 Hz |
| Power Consumption | 150 W |
| Operating Temperature | 10–40 °C |
| Relative Humidity | ≤85% RH |
| Dimensions (W×D×H) | 400 × 180 × 380 mm |
| Net Weight | 12.5 kg |
Overview
The Jiayuan NG1903 High-Purity Nitrogen Generator is an on-demand, membrane-based nitrogen generation system engineered for continuous, reliable supply of ultra-high-purity nitrogen gas in laboratory environments. It employs a selective permeation principle—utilizing hollow-fiber polymer membranes that separate nitrogen from compressed ambient air by differential gas diffusion rates—to deliver consistent 99.999% N₂ with oxygen residual below 3 ppm and a dew point of −56 °C. Designed for integration with analytical instruments such as GC, LC-MS, FTIR, and elemental analyzers, the NG1903 eliminates dependency on high-pressure cylinders or liquid nitrogen dewars, reducing logistical overhead, safety risks, and long-term operational cost. Its compact footprint (400 × 180 × 380 mm) and low power draw (150 W) make it suitable for benchtop deployment in QC labs, research facilities, and regulated pharmaceutical testing environments.
Key Features
- Stable nitrogen purity output: maintains ≥99.999% N₂ across full flow range (0–300 mL/min), verified per ISO 8573-1:2010 Class 2.2.1 for particulate, water, and oil content.
- Intelligent flow-tracking control: dynamically adjusts membrane module loading and pressure regulation to match real-time demand—minimizing energy waste and ensuring stable outlet pressure at 0.4 MPa ±0.003 MPa.
- Integrated anti-liquid ingress protection: features a dual-stage condensate trap and automatic drain valve with level-sensing logic to prevent moisture or compressor oil carryover into the membrane stack—a critical safeguard for long-term membrane integrity and gas purity consistency.
- Robust thermal management: optimized heat dissipation design ensures stable performance within ambient temperatures from 10 °C to 40 °C and relative humidity up to 85% RH without derating.
- Front-panel LED status indicators: provide real-time feedback on power, pressure, flow, and fault conditions—including overtemperature, low inlet pressure, and membrane saturation warnings.
Sample Compatibility & Compliance
The NG1903 is compatible with standard 6 mm OD/4 mm ID stainless steel or PTFE tubing and interfaces seamlessly with common instrument gas inlets via 1/8″ NPT or Swagelok®-compatible fittings. It meets essential electrical safety requirements per GB 4793.1–2007 (equivalent to IEC 61010-1) and complies with electromagnetic compatibility standards GB/T 18268.1–2010 (IEC 61326-1). While not certified for hazardous area use, its design supports GLP-compliant operation when deployed in controlled laboratory settings. The unit does not require external calibration; however, periodic verification of outlet O₂ concentration using a trace oxygen analyzer (e.g., electrochemical or zirconia sensor) is recommended every 6 months per internal QA protocols.
Software & Data Management
The NG1903 operates as a standalone hardware system with no embedded firmware or digital connectivity. All operational parameters are managed via analog pressure regulators and fixed-flow control valves—ensuring deterministic behavior, immunity to software failure, and compatibility with air-handling systems lacking network infrastructure. For laboratories requiring audit-ready records, optional external data loggers can be connected to monitor inlet pressure, outlet pressure, and runtime hours. When used in FDA-regulated environments (e.g., USP GC methods), the device supports 21 CFR Part 11 compliance through procedural controls—such as documented maintenance logs, change control records for filter replacements, and routine purity verification reports.
Applications
- Carrier and purge gas for gas chromatography (GC) and GC-MS systems requiring inert, dry, hydrocarbon-free N₂.
- Blanketing and purging in sample preparation workflows for trace metal analysis (ICP-MS, AAS) and organic residue testing.
- Mobile and field-deployable labs where cylinder logistics are impractical—especially in environmental monitoring and forensic analysis.
- Support gas for laser cutting assist, plasma cleaning, and glovebox inerting in materials science R&D.
- Backup or primary nitrogen source for nitrogen-sensitive detectors including ECD, TCD, and NPD.
FAQ
What inlet air quality is required for optimal NG1903 performance?
A clean, oil-free, desiccated air supply meeting ISO 8573-1 Class 2.2.1 (≤0.1 µm particles, ≤0.1 mg/m³ oil aerosol, dew point ≤−40 °C) is strongly recommended. Use of a coalescing filter + refrigerated dryer upstream is advised if feeding from a standard lab compressor.
Can the NG1903 be used with mass spectrometry instruments?
Yes—its 99.999% N₂ purity, sub-3 ppm O₂, and −56 °C dew point meet typical requirements for LC-MS nitrogen curtain gas and GC-MS auxiliary gas applications. Confirm compatibility with your instrument manufacturer’s gas specification sheet.
Is the 12-month warranty transferable if the unit is resold?
No—the warranty is valid only for the original end-user purchaser and requires proof of date-of-purchase and registration with Jiayuan authorized service partners in China.
How often should the pre-filter and coalescing filter be replaced?
Under typical lab conditions (8 h/day, 5 days/week), replace the inlet particulate filter every 6 months and the coalescing filter annually—or sooner if pressure drop exceeds 0.05 MPa.
Does the NG1903 generate noise above permissible lab thresholds?
Operating sound pressure level is ≤48 dB(A) at 1 m distance, well within WHO-recommended limits for laboratory workspaces (≤55 dB(A)).
