BOXUN BJ-1CD Vertical Laminar Flow Clean Bench

Overview

The BOXUN BJ-1CD Vertical Laminar Flow Clean Bench is an ISO Class 5-certified local air purification system engineered for controlled microbiological and aseptic operations in research, quality control, and production environments. It operates on the principle of vertical unidirectional laminar airflow: ambient air is drawn through a pre-filter (medium-efficiency), then pressurized by a high-stability centrifugal blower into a plenum chamber, and finally passed through a certified HEPA filter (EN 1822 H14 or equivalent, ≥99.99% @ 0.5 µm) to generate a particle-free, downward-flowing air curtain across the work surface. This airflow architecture minimizes turbulence-induced cross-contamination and ensures consistent protection of both samples and personnel during non-hazardous procedures. Designed for compliance with ISO 14644-1, NSF/ANSI 49 (Class I interpretation for non-recirculating configurations), and GMP Annex 1 foundational requirements, the BJ-1CD serves as a critical engineering control in cell culture preparation, media dispensing, pharmaceutical aseptic filling support, and environmental sampling workflows.

Key Features

• Real-time digital monitoring via backlit LCD interface: displays instantaneous air velocity (0.3–0.6 m/s, six-step adjustable), cumulative operating hours, HEPA filter differential pressure, system clock, and visual HEPA integrity status.
• Dual-stage filtration architecture: integrated medium-efficiency pre-filter extends HEPA service life by capturing coarse particulates; main HEPA filter meets EN 1822 H14 performance criteria for ≥0.5 µm particles.
• Acoustically optimized centrifugal blower: delivers stable airflow with noise emission ≤67 dB(A) at 1 m distance — suitable for shared laboratory spaces requiring low ambient disturbance.
• Ergonomic operator interface: 5° forward-inclined front panel reduces cervical strain; counterbalanced vertical sash enables precise, tool-free positioning within operational range.
• Integrated safety interlocks: UV germicidal lamp (20 W) and fluorescent illumination (30 W) operate exclusively in mutually exclusive modes; automatic cutoff upon sash opening prevents UV exposure.
• Modular utility integration: built-in splash-resistant AC power outlets (IEC 60320 C13), plus dedicated quick-connect ports for compressed air and deionized water supply — eliminating external conduit clutter.
• Mechanical stability: reinforced cold-rolled steel frame with dual-function mobility system — swivel casters for relocation, adjustable leveling feet for vibration-dampened stationary operation (vibration amplitude ≤5 µm peak-to-peak).

Sample Compatibility & Compliance

The BJ-1CD is validated for use with non-pathogenic biological materials, sterile reagents, sensitive electronic components, and precision optical assemblies where particulate contamination must be held below 3,520 particles/m³ (ISO Class 5). Its vertical laminar design prevents recirculation of contaminated air into the work zone, making it appropriate for applications governed by USP , EU GMP Annex 1 (Section 4.32–4.35), and ISO 14644-1:2015. While not rated for containment of hazardous agents (i.e., not a biosafety cabinet), its construction adheres to material compatibility standards for repeated disinfection with 70% ethanol, isopropyl alcohol, and quaternary ammonium compounds. Stainless steel work surface (SUS304) resists corrosion from routine chemical exposure and facilitates traceable cleaning validation per GLP/GMP documentation protocols.

Software & Data Management

The BJ-1CD employs embedded firmware without external PC dependency. All operational parameters are logged internally with timestamped records accessible via LCD navigation. Cumulative runtime, filter pressure differential trends, and HEPA alarm events are retained for maintenance scheduling and audit readiness. Though not equipped with network connectivity or FDA 21 CFR Part 11-compliant electronic signatures, its deterministic parameter logging supports retrospective review during internal quality audits and regulatory inspections (e.g., ISO 9001, ISO 13485). Filter replacement intervals can be estimated using differential pressure thresholds calibrated against initial baseline measurements — a practice aligned with ISO 14644-3 Annex D guidance for HEPA filter lifecycle management.

Applications

• Aseptic handling of mammalian and microbial cell cultures in academic and industrial biotechnology labs.
• Preparation and dispensing of sterile culture media, buffers, and reagents under controlled particle counts.
• Assembly and testing of microelectromechanical systems (MEMS), semiconductor wafers, and optical sensors requiring sub-micron cleanliness.
• Environmental microbiology workflows including air and surface sampling kit assembly and plate streaking.
• Support function in pharmaceutical QC laboratories for non-sterile product inspection and reference standard handling.
• Education and training environments where reproducible laminar flow fundamentals must be demonstrated without biosafety infrastructure.

FAQ

What ISO cleanliness class does the BJ-1CD achieve?
It maintains ISO Class 5 (formerly Federal Standard 209E Class 100) conditions in the work area, verified by ≥99.99% removal efficiency for particles ≥0.5 µm.
Is this unit suitable for handling infectious agents?
No — it provides personnel and product protection only; it lacks negative-pressure containment and is not certified as a biosafety cabinet (BSC) per NSF/ANSI 49.
How often should the HEPA filter be replaced?
Replacement frequency depends on usage intensity and ambient air quality; typical service life ranges from 12–24 months, guided by differential pressure increase (>250 Pa above baseline) or scheduled validation testing.
Can the airflow velocity be calibrated onsite?
Yes — the system includes a factory-trimmed anemometer input; certified calibration requires NIST-traceable hot-wire or vane anemometer verification at three points across the work surface per ISO 14644-3.
Does the unit comply with electrical safety standards for international deployment?
It conforms to GB 4793.1 (China’s equivalent to IEC 61010-1) for laboratory equipment; CE marking is not inherent but may be obtained via third-party notified body assessment for EU market access.