BOXUN SW-CJ-1CU Horizontal Laminar Flow Clean Bench

Overview

The BOXUN SW-CJ-1CU Horizontal Laminar Flow Clean Bench is an ISO Class 5-certified local environmental control system engineered to deliver unidirectional, particle-free airflow across the operator-facing work surface. Operating on the principle of horizontal laminar flow—where filtered air moves uniformly from the rear plenum toward the user at a controlled velocity (0.3–0.6 m/s)—this clean bench establishes a sterile microenvironment ideal for non-hazardous applications requiring protection of samples and processes from ambient particulate contamination. Unlike vertical flow hoods or biosafety cabinets, the SW-CJ-1CU does not provide personnel or environmental protection against biohazards or volatile chemicals; its design prioritizes sample integrity in aseptic techniques, making it suitable for microbiological culture handling, pharmaceutical formulation staging, precision electronics assembly, and reagent preparation under controlled particulate conditions.

Key Features

• Robust structural architecture: Housing fabricated from cold-rolled steel with electrostatic epoxy powder coating ensures long-term corrosion resistance and mechanical stability; work surface constructed from electropolished SUS304 stainless steel for chemical inertness and ease of decontamination.
• Dual-stage filtration system: Incorporates a pre-filter (medium-efficiency panel type) upstream of two independently mounted HEPA filters (600 × 575 × 50 mm and 815 × 575 × 50 mm), each certified to EN 1822-1:2019 with ≥99.99% efficiency for particles ≥0.5 µm—extending service life and maintaining consistent airflow uniformity.
• Precision airflow management: Equipped with a brushless centrifugal blower delivering stable, low-vibration output; six-step adjustable fan speed via tactile membrane interface enables optimization for varying procedural demands (e.g., sensitive cell manipulation vs. routine media pouring).
• Integrated dual-lighting system: Separate controls for 40 W fluorescent illumination (≥300 lux at work surface per IEC 61265) and 40 W UV-C germicidal lamp (253.7 nm peak emission); UV timer supports programmable exposure from 0 to 999 minutes with automatic shutoff and interlocked safety cutoff upon sash movement.
• Ergonomic and compliant access design: Full-width horizontal sliding sash provides unobstructed entry while minimizing turbulence ingress; 8 mm tempered glass side panels offer optical clarity, impact resistance, and minimal static charge accumulation.

Sample Compatibility & Compliance

The SW-CJ-1CU is validated for use with non-pathogenic biological materials, sterile pharmaceutical intermediates, semiconductor wafers, optical components, and calibration standards where airborne particulate control is critical. It complies with ISO 14644-1:2015 (Class 5), GB/T 25220–2010 (Chinese national standard for clean benches), and aligns with Good Manufacturing Practice (GMP) Annex 1 principles for aseptic processing environments. While not certified to NSF/ANSI 49 or EN 12469, its horizontal flow configuration conforms to ISO 14644-7:2004 requirements for clean air devices used in non-hazardous applications. Routine validation—including airflow velocity mapping, particle counting (ISO 14644-1), and illumination uniformity assessment—is recommended per institutional SOPs and applicable regulatory frameworks (e.g., FDA Guidance for Industry: Sterile Drug Products Produced by Aseptic Processing).

Software & Data Management

The SW-CJ-1CU features embedded firmware with no external software dependency. All operational parameters—including fan speed setting, UV timer status, and real-time LED indicators for lamp operation—are managed via the integrated LCD interface. The system logs no audit trail data and does not support network connectivity, remote monitoring, or electronic recordkeeping. For laboratories operating under 21 CFR Part 11 or EU Annex 1 requirements, manual logbooks must be maintained for UV exposure cycles, filter replacement dates, and periodic performance verification results. Optional third-party environmental monitoring systems may be interfaced externally using analog voltage outputs (if retrofitted), though such integration falls outside factory specifications.

Applications

• Aseptic transfer of microbial cultures, plant tissue explants, and mammalian cell lines in academic and industrial biotechnology labs.
• Preparation and dispensing of sterile buffers, growth media, and analytical standards in QC/QA laboratories supporting pharmaceutical and diagnostic manufacturing.
• Assembly and inspection of microelectromechanical systems (MEMS), photomasks, and fiber-optic connectors where sub-micron particle exclusion is mandatory.
• Environmental monitoring sample processing—including air filter analysis, water microbiology membrane filtration, and sedimentation plate incubation—in compliance with ISO 14698-1.
• Calibration and handling of reference materials in metrology labs where electrostatic discharge (ESD)-safe surfaces and low-vibration operation are required.

FAQ

What ISO cleanliness class does the SW-CJ-1CU meet?

It meets ISO Class 5 (formerly “100-level”) for airborne particulate concentration when tested per ISO 14644-1:2015, with ≥99.99% removal efficiency for particles ≥0.5 µm.
Can this unit be used for handling hazardous biological agents?

No. As a horizontal laminar flow device without negative pressure containment or exhaust ducting, it offers no protection against aerosolized pathogens or toxic vapors.
How often should the HEPA filters be replaced?

Filter replacement frequency depends on usage intensity and ambient air quality; typical service intervals range from 12 to 24 months, verified by differential pressure monitoring and particle challenge testing.
Is UV irradiation time logged automatically?

No. The UV timer is manually set and lacks data export or event logging capability; operators must record exposure duration and date in a controlled logbook.
Does the unit comply with FDA 21 CFR Part 11?

No. The SW-CJ-1CU contains no electronic signature functionality, audit trail generation, or secure user authentication—features required for Part 11 compliance.