Shengaohua SH-5L(V11) Nitrogen Generator

Overview

The Shengaohua SH-5L(V11) Nitrogen Generator is an integrated, on-demand laboratory-grade nitrogen supply system engineered for precision gas delivery in analytical and preparative applications. It employs hollow-fiber membrane separation technology — a pressure-driven physical process where compressed air passes through semi-permeable polymeric membranes, selectively permeating oxygen, water vapor, and CO₂ while retaining nitrogen molecules due to their lower diffusivity and solubility. This principle enables continuous, oil-free nitrogen generation without consumables, catalysts, or chemical regeneration cycles. Designed for benchtop deployment in QC labs, GC laboratories, sample preparation workstations, and inert atmosphere glove boxes, the SH-5L(V11) delivers stable, high-purity nitrogen (≥99.9%) at flow rates up to 5 L/min and pressures up to 0.65 MPa — eliminating dependency on high-pressure cylinders and associated safety, logistics, and regulatory overhead.

Key Features

• Integrated oil-free scroll compressor: Eliminates need for external compressed air sources; ensures consistent inlet pressure and flow for optimal membrane performance.
• Hollow-fiber membrane module with ultra-fine pore structure: Provides stable nitrogen purity ≥99.9% across full flow range (0–5 L/min), with no decline over time or requirement for secondary purification stages.
• Multi-stage filtration architecture: Includes coalescing pre-filter, activated carbon adsorber, and desiccant dryer — all using imported components — to remove particulates, hydrocarbons, moisture, and trace oil vapors; zero liquid carryover.
• Dual-pressure protection system: Combines mechanical pressure relief valve and electronic pressure sensor monitoring to automatically shut down upon overpressure or underpressure conditions, ensuring operational integrity.
• Intelligent clogging detection: Real-time differential pressure monitoring across filter stages triggers audible/visual alerts when service intervals are approached, supporting preventive maintenance planning.
• Acoustic optimization: Triple-stage noise suppression — including internal silencer, vibration-damping mounting, and acoustic insulation enclosure — achieves <30 dB(A) at 1 meter, meeting stringent quiet-lab requirements.
• Compact footprint & lightweight design: Dimensions ≤425 × 500 × 700 mm and mass ≤30 kg enable flexible integration into fume hoods, instrument carts, or shared lab benches without structural reinforcement.

Sample Compatibility & Compliance

The SH-5L(V11) is compatible with nitrogen-dependent instrumentation requiring continuous, low-particulate, low-moisture feed gas — including gas chromatographs (GC), GC-MS systems, evaporative light scattering detectors (ELSD), nitrogen blow-down concentrators, solid-phase extraction (SPE) manifolds, and inerting systems for sensitive reagents. Its output meets ASTM D6352–22 specifications for instrumental-grade nitrogen used in chromatographic carrier and purge gas applications. While not certified to ISO 8573-1 Class 0 for total oil content, its filtration configuration consistently achieves Class 1 (≤0.01 mg/m³ oil aerosol) and Class 2 (≤0.1 ppmv water vapor) under nominal operating conditions. The unit complies with IEC 61010-1:2010 for laboratory electrical safety and supports GLP/GMP-aligned operation through stable output parameters, built-in diagnostics, and traceable maintenance logging via optional software integration.

Software & Data Management

The SH-5L(V11) operates as a standalone hardware platform with embedded digital control logic — no proprietary PC software is required for basic operation. All critical parameters (output pressure, flow rate, filter status, compressor runtime) are displayed on a backlit LCD interface with real-time feedback. For laboratories implementing electronic record-keeping per FDA 21 CFR Part 11, optional RS-232 or USB-to-serial interface modules support integration with LIMS or SCADA systems. These interfaces transmit timestamped operational data (including alarm events and pressure deviations) in ASCII format, enabling audit-trail generation, trend analysis of membrane performance decay, and automated calibration scheduling. Firmware updates are performed via secure USB key, preserving configuration integrity during revision cycles.

Applications

• GC carrier and make-up gas supply: Delivers consistent flow and purity critical for retention time stability and detector sensitivity (e.g., FID, TCD, ECD).
• Sample concentration and solvent evaporation: Powers nitrogen blow-down systems for rapid, reproducible volume reduction of extracts prior to LC-MS or HPLC analysis.
• Inert atmosphere maintenance: Supports nitrogen purging in reaction vessels, storage cabinets, and glove boxes handling moisture- or oxygen-sensitive compounds (e.g., organometallics, lithium reagents).
• LC mobile phase sparging: Removes dissolved oxygen from HPLC solvents to prevent column oxidation and baseline drift.
• Instrument purge gas for FTIR, XRD, and SEM sample chambers: Minimizes atmospheric interference during spectral acquisition or surface imaging.

FAQ

What is the expected service life of the hollow-fiber membrane module?
Under recommended operating conditions (inlet air dew point ≤−40 °C, particulate filtration to ISO 8573-1 Class 2), the membrane module typically maintains ≥99.9% purity for >15,000 hours of continuous operation — equivalent to ~1.7 years of 24/7 use.
Does the generator require periodic calibration?
No routine calibration is required; however, annual verification of nitrogen purity using a certified electrochemical or paramagnetic analyzer is recommended for GxP environments.
Can the SH-5L(V11) be used with GC-MS systems requiring ultra-high-purity nitrogen?
It meets standard GC carrier gas specifications (ASTM D6352); for MS source or collision gas applications demanding ≥99.999% purity, supplemental PSA or cryogenic purification is advised.
Is remote monitoring supported out-of-the-box?
Basic local monitoring is enabled via front-panel display; remote access requires optional serial interface hardware and third-party SCADA/LIMS configuration.
What maintenance intervals apply to the filtration system?
Pre-filter elements should be replaced every 6 months under continuous use; activated carbon and desiccant stages require replacement every 12–18 months depending on ambient air quality and usage profile.