Hujing Purification HD-850 Horizontal Laminar Flow Clean Bench

Overview

The Hujing Purification HD-850 Horizontal Laminar Flow Clean Bench is an ISO Class 5-certified local air purification system engineered for applications requiring particle-free, microbiologically controlled environments at the workstation level. It operates on the principle of horizontal laminar airflow: ambient air is drawn through a prefilter, then passed through a single high-efficiency particulate air (HEPA) filter (rated at ≥99.99% efficiency for particles ≥0.3 µm), and delivered as a uniform, unidirectional stream across the work surface at controlled velocity (0.25–0.45 m/s). This design minimizes turbulence and cross-contamination, making it suitable for non-hazardous procedures where operator protection is not required—such as aseptic handling of cell cultures, media preparation, pharmaceutical compounding, and precision assembly of optical or microelectronic components. Unlike vertical flow clean benches or biosafety cabinets, the HD-850 does not recirculate air nor provide personnel or environmental protection against biohazards; its primary function is product protection in low-risk, cleanroom-adjacent settings.

Key Features

• Horizontal laminar airflow architecture with a quasi-enclosed tempered glass sash for ergonomic access and visual monitoring while maintaining flow integrity.
• Compact footprint (850 × 550 × 850 mm overall) designed for desktop integration—requires no dedicated floor space or structural modification, ideal for shared labs, teaching facilities, and pilot-scale R&D environments.
• Dual-speed fan control via remote switch enables real-time adjustment of face velocity to match procedural requirements (e.g., slower speed for delicate tissue manipulation, faster for rapid solvent evaporation).
• Integrated 15 W UV-C germicidal lamp (254 nm) with safety interlock—automatically deactivates when sash is opened—to support routine surface decontamination between operations.
• High-luminance 15 W fluorescent lighting (≥300 lx at work surface) ensures accurate visual inspection without thermal load or spectral interference.
• Low-vibration mechanical design (≤5 µm half-amplitude across all three axes) supports vibration-sensitive tasks such as micropipetting, gravimetric analysis, or optical alignment.

Sample Compatibility & Compliance

The HD-850 is validated for use with non-pathogenic biological samples, sterile reagents, sensitive electronic substrates, and pharmaceutical intermediates. Its performance complies with ISO 14644-1:2015 (Cleanrooms and associated controlled environments — Part 1: Classification of air cleanliness by particle concentration) for ISO Class 5 under dynamic operating conditions. Particle challenge testing follows ISO 21501-4 for light-scattering airborne particle counters. Microbiological validation per ISO 14698-1 confirms ≤0.5 colony-forming units (CFU) per 90-mm Petri dish per hour under standard test protocols. While not certified to NSF/ANSI 49 or EN 12469 (which govern biosafety cabinets), the HD-850 meets general laboratory hygiene expectations outlined in CLSI GP31-A5 and USP Annex for non-hazardous sterile compounding environments when operated within defined procedural controls.

Software & Data Management

The HD-850 is a standalone electromechanical system with no embedded firmware, network interface, or digital data logging capability. All operational parameters—including fan speed selection, UV exposure timing, and illumination status—are managed manually via physical remote switch and mechanical controls. This analog architecture eliminates cybersecurity risks, reduces maintenance complexity, and ensures long-term reliability in resource-constrained or regulated environments where audit trails are maintained externally (e.g., via lab notebook entries or GLP-compliant SOP documentation). For laboratories requiring traceability, optional external environmental monitors (e.g., particle counters, anemometers, or temperature/humidity loggers) may be deployed in parallel and synchronized with procedural records.

Applications

• Aseptic transfer and subculturing of mammalian and microbial cell lines in academic and industrial life science labs.
• Preparation of sterile culture media, buffers, and diluents for QC microbiology and bioprocessing.
• Handling of sensitive photonic or MEMS devices where electrostatic discharge (ESD) and particulate contamination must be minimized.
• Non-sterile but cleanliness-critical tasks in semiconductor packaging, precision optics assembly, and analytical reference standard preparation.
• Educational demonstrations of laminar flow principles, filtration efficiency, and clean technique fundamentals.

FAQ

Is the HD-850 suitable for working with infectious agents or toxins?

No. It provides product protection only—not personnel or environmental protection—and must not be used for BSL-2 or higher agents.
Does the unit include HEPA filter replacement service or certification documentation?

The HD-850 ships with one certified HEPA filter (test report available upon request); annual filter integrity testing and scheduled replacement are user responsibilities per ISO 14644-3 recommendations.
Can the work surface be customized with stainless steel or chemical-resistant materials?

Standard configuration features 304 stainless steel; custom work surface materials (e.g., epoxy resin, polypropylene) are available under OEM agreement with minimum order volume.
What electrical safety standards does the HD-850 meet?

It complies with GB 4706.1–2005 (Chinese national standard equivalent to IEC 60335-1) for household and similar electrical appliances, including dielectric strength, grounding continuity, and leakage current limits.
Is UV lamp intensity monitored or calibrated during operation?

No real-time UV intensity monitoring is built-in; users should verify output annually using a NIST-traceable UV radiometer per ISO/IEC 17025 guidelines if UV decontamination efficacy is critical to process validation.