SCIWAY ZNG1000 Series Membrane-Based Nitrogen Generator

Overview

The SCIWAY ZNG1000 Series is a dedicated membrane-based nitrogen generator engineered for continuous, on-demand supply of high-purity nitrogen gas (99.9%) to support critical laboratory applications—particularly LC-MS, GC-MS, and other mass spectrometry platforms requiring stable, oil-free, low-dew-point nitrogen. Unlike pressure swing adsorption (PSA) systems, the ZNG1000 employs proprietary hollow-fiber membrane separation technology: compressed air is passed through selectively permeable polymeric membranes that preferentially allow oxygen, water vapor, and CO₂ to permeate outward, while retaining nitrogen in the non-permeate stream. This principle ensures inherently oil-free output without consumables, moving parts, or regeneration cycles—delivering consistent purity and pressure stability under variable demand. Designed for integration with certified oil-free compressors, the system meets the stringent gas quality requirements of major analytical instrument manufacturers including AB SCIEX, Agilent, Waters, Thermo Fisher Scientific, and Shimadzu—serving as a reliable alternative to high-pressure nitrogen cylinders or liquid nitrogen dewars.

Key Features

• Integrated refrigerated air dryer delivering a consistent dew point of −20 °C—critical for humidity-sensitive applications in high-ambient-humidity environments common across many Asian and tropical laboratories.
• Stainless steel buffer tank (ASME BPVC Section VIII compliant design) dampens pressure fluctuations, reduces compressor cycling frequency, and extends service life of upstream air compressors.
• Modular architecture with tool-free access to core components—including membrane modules, pre-filters, and dryer elements—enabling rapid field maintenance without specialized technicians.
• Compact footprint (W × D × H: 600 × 550 × 1,100 mm) with industrial-grade casters for flexible repositioning within constrained lab spaces; no permanent anchoring required.
• Acoustically optimized enclosure achieving <55 dB(A) at 1 m—meeting ISO 7779 noise emission standards for laboratory equipment and minimizing auditory fatigue during extended operation.
• No routine consumables beyond standard coalescing and particulate pre-filters (ISO 8573-1 Class 2:2:2 compliant); membrane lifetime exceeds 15,000 operating hours under specified inlet air conditions.

Sample Compatibility & Compliance

The ZNG1000 is validated for compatibility with all major LC-MS and GC-MS platforms requiring nitrogen for ESI, APCI, and TurboIonSpray ion sources, as well as for collision gas (CID), nebulizing gas, and drying gas functions. Its output meets ISO 8573-1:2010 Class 2:2:2 (solid particles ≤ 0.1 µm, moisture ≤ −20 °C dew point, oil content ≤ 0.01 mg/m³) and ASTM D6349–21 specifications for instrument-grade nitrogen. The system supports GLP/GMP-aligned operation through optional analog 4–20 mA or digital Modbus RTU interfaces for integration into centralized lab monitoring systems. While not FDA 21 CFR Part 11–certified out-of-the-box, its data logging-capable controller (with optional USB/RS-485) enables audit-trail-ready configuration when deployed with compliant software infrastructure.

Software & Data Management

The ZNG1000 operates via an embedded microcontroller with local LED interface displaying real-time pressure, flow, dew point, and system status. Optional Ethernet or RS-485 connectivity allows remote monitoring and alarm notification via SCADA or LabVantage-compatible middleware. All operational parameters—including runtime hours, filter replacement intervals, and pressure deviation logs—are timestamped and exportable in CSV format. Firmware updates are performed via secure USB key; no cloud dependency or external vendor login is required—ensuring full data sovereignty and alignment with institutional IT security policies.

Applications

• LC-MS/MS and HRAM-MS nitrogen supply for electrospray ionization (ESI), atmospheric pressure chemical ionization (APCI), and heated electrospray ionization (HESI) sources.
• GC-MS carrier and make-up gas where ultra-low moisture and hydrocarbon-free nitrogen are mandatory for column longevity and baseline stability.
• Nitrogen blanketing in sample preparation workstations and solvent evaporation systems (e.g., TurboVap®, CentriVap®).
• Instrument purge gas for FTIR, XRD, and SEM chambers requiring inert, particle-free atmospheres.
• On-site nitrogen for QA/QC labs operating under ISO/IEC 17025:2017, where traceability of gas source and consistency of delivery parameters are auditable requirements.

FAQ

What inlet air quality is required for optimal membrane performance?
Oil-free compressed air meeting ISO 8573-1 Class 1:2:1 (≤0.01 mg/m³ oil aerosol, ≤0.1 µm particles, dew point ≤3 °C) is recommended; inlet filtration must include coalescing and activated carbon stages.
Can the ZNG1000 be used with existing lab air compressors?
Yes—provided the compressor is certified oil-free and delivers stable pressure between 116–145 psi with ≤±3% fluctuation; a dedicated regulator and moisture trap are strongly advised upstream.
Is nitrogen purity affected by ambient temperature or altitude?
No—membrane separation efficiency remains stable across 5–40 °C ambient range and up to 2,500 m elevation; however, output flow may decrease ~1.2% per 300 m above sea level due to reduced inlet air density.
How often do the pre-filters require replacement?
Coalescing filters should be replaced every 2,000–3,000 operating hours; activated carbon filters every 4,000 hours—both intervals extend with use of high-efficiency upstream air dryers.
Does the system support redundant operation or parallel configuration?
Yes—the ZNG1000 can be manifolded with up to three units using pressure-synchronized headers and check valves to achieve N+1 redundancy or scalable flow capacity up to 105 L/min.