Zhonghuipu KN-600 High-Purity Nitrogen Generator (Pressure Swing Adsorption)
| Brand | Zhonghuipu |
|---|---|
| Origin | Beijing, China |
| Manufacturer Type | Direct Manufacturer |
| Instrument Type | Nitrogen Generator |
| Nitrogen Generation Principle | Pressure Swing Adsorption (PSA) |
| Output Flow Rate | 0–600 mL/min |
| Output Pressure | 0–0.4 MPa |
| Nitrogen Purity | ≥99.9995% |
| Dew Point | ≤−55 °C |
| Particulate Filtration | <0.01 µm |
| Hydrocarbon Content | ≤0.1 ppm (when inlet air hydrocarbon concentration <100 ppm) |
| Oxygen Content | ≤3 ppm |
| Power Supply | 220 V ±10%, 50 Hz |
| Power Consumption | 1200 W |
| Dimensions (W×D×H) | 400 × 500 × 800 mm |
| Net Weight | ~55 kg |
Overview
The Zhonghuipu KN-600 is a high-purity nitrogen generator engineered for continuous, on-demand supply of laboratory-grade nitrogen gas via pressure swing adsorption (PSA) technology. Designed specifically for analytical instrumentation—including gas chromatography (GC), electron capture detection (ECD), and polar column operation—the system delivers nitrogen with purity ≥99.9995% (≤3 ppm O₂), dew point ≤−55 °C, and hydrocarbon content ≤0.1 ppm (under specified inlet air conditions). Its integrated oil-free compressor eliminates dependence on external compressed air sources, enabling fully autonomous operation from standard AC power. The KN-600 adheres to core engineering principles of PSA: alternating adsorption/desorption cycles across dual industrial-grade aluminum adsorption towers packed with imported Japanese zeolite molecular sieve, optimized for high nitrogen selectivity, mechanical stability, and long service life under cyclic pressure loading.
Key Features
- Integrated Thomas (USA) oil-free scroll compressor ensures contaminant-free feed air—no external air supply or lubricated maintenance required.
- Dual-tower PSA architecture with advanced cycle control algorithm maximizes nitrogen recovery efficiency and stabilizes output during dynamic flow demand.
- High-performance molecular sieve (imported from Japan) offers superior adsorption capacity, crush resistance, and thermal stability—rated for >20,000 operational hours under typical lab duty cycles.
- Post-adsorption purification train includes SMC (Japan) 0.01 µm coalescing filter and high-temperature precious-metal catalytic hydrocarbon converter—certified compatible with ECD and sensitive polar GC columns.
- All-wetted gas path components constructed from electropolished 304 stainless steel; adsorption towers treated with industrial-grade sandblasting and anodization to eliminate volatile organic emissions and surface particulates.
- Microprocessor-based controller with backlit LCD interface supports real-time monitoring of pressure, flow, purity status indicators, and fault diagnostics—including overpressure, overheating, and low-sieve-bed integrity alerts.
Sample Compatibility & Compliance
The KN-600 is validated for use with GC systems requiring ultra-high-purity carrier or detector gases per ASTM D6376 (hydrocarbon analysis), ISO 8573-1 Class 1:2:1 (compressed air quality), and USP specifications for pharmaceutical residual solvent analysis. Its ≤3 ppm oxygen and ≤0.1 ppm total hydrocarbons meet the stringent requirements of EPA Method 8260C (GC/MS), ICH Q5C (protein stability), and GLP-compliant environmental testing labs. The unit complies with IEC 61010-1 safety standards for laboratory electrical equipment and incorporates redundant thermal fusing, pressure relief valves, and automatic shutdown logic for fail-safe operation in unattended 24/7 environments.
Software & Data Management
While the KN-600 operates as a standalone instrument with local LCD control, its analog output (4–20 mA) and digital RS-232 interface support integration into centralized lab infrastructure. Optional data logging modules enable timestamped recording of outlet pressure, flow rate, and system temperature—traceable for FDA 21 CFR Part 11–compliant audit trails when paired with validated third-party SCADA or LIMS platforms. All firmware updates are performed via secure USB interface with version-controlled checksum verification to ensure regulatory integrity.
Applications
- Carrier gas for capillary GC and GC-MS systems—particularly with ECD, NPD, and polar stationary phases (e.g., wax, cyanopropylphenyl, polyethylene glycol).
- Detector purge and make-up gas in flame ionization (FID) and thermal conductivity (TCD) detectors.
- Inert blanketing during sample preparation, solvent evaporation, and reagent storage in analytical chemistry and pharmaceutical QC labs.
- Supply source for nitrogen-purged glove boxes, FTIR desiccators, and XRD sample chambers requiring consistent dew point ≤−55 °C.
- On-site replacement of high-pressure nitrogen cylinders in academic research facilities, contract testing labs, and regulated manufacturing environments seeking reduced logistical risk and cylinder-handling liability.
FAQ
What is the expected service life of the molecular sieve under normal laboratory usage?
With proper inlet air filtration and adherence to ambient temperature/humidity limits (15–30 °C, <60% RH), the zeolite bed maintains specification performance for ≥5 years or 20,000 operating hours.
Does the KN-600 require external compressed air?
No—it integrates a Thomas oil-free compressor and draws ambient air directly; no external air line or dryer is needed.
Can the unit be validated for GMP environments?
Yes—its design supports IQ/OQ documentation packages, and all critical parameters (flow, pressure, purity proxies) are accessible for calibration traceability and periodic requalification per Annex 15 and ASTM E2500.
Is remote monitoring supported?
Standard RS-232 and 4–20 mA outputs allow connection to building management systems or PLCs; optional Ethernet gateway enables SNMP-based network visibility.
What maintenance intervals are recommended?
Pre-filter replacement every 6 months; coalescing filter every 12 months; annual verification of catalytic converter activity and pressure decay test of adsorption towers.
