Zhicheng ZHJH-C1209B Vertical Laminar Flow Clean Bench

Overview

The Zhicheng ZHJH-C1209B Vertical Laminar Flow Clean Bench is an ISO Class 5-certified laboratory containment system engineered for personnel- and product-protection in non-hazardous applications requiring unidirectional, particle-free airflow. It operates on the principle of vertical laminar flow: ambient air is drawn through a coarse pre-filter to capture large particulates, then pressurized into a plenum chamber before passing through a certified HEPA filter (efficiency ≥99.995% at 0.3 µm). The resulting uniform, downward airflow—free of turbulence and recirculation—sweeps contaminants away from the work surface and out through the front grille, maintaining a sterile microenvironment compliant with US Federal Standard 209E Class 100 (≥0.5 µm particles). Designed for routine aseptic procedures in biosafety Level 1 (BSL-1) environments, this dual-workstation bench does not provide operator protection against biohazards or volatile chemicals; it is intended exclusively for clean processing where sample integrity—not personnel safety—is the primary concern.

Key Features

• Vertical laminar airflow architecture with integrated pre-filter and certified HEPA filtration (EN 1822-1 H14 or equivalent), ensuring continuous ISO Class 5 performance
• Dual independent work surfaces (900 × 650 × 645 mm each), optimized for parallel handling of sensitive biological or pharmaceutical samples
• Seven-step adjustable air velocity control (0.3–0.6 m/s) with real-time LED digital display for precise process alignment
• Self-balancing vertical sash window with frictionless counterweight mechanism, enabling stable positioning at any height between 100–400 mm
• Double-sided transparent acrylic side windows (height ≥500 mm) providing wide-angle visibility and enhanced ambient illumination without glare
• Electropolished 304 stainless steel work surface—non-porous, corrosion-resistant, and compatible with common disinfectants including 70% ethanol and sodium hypochlorite
• Dedicated UV-C germicidal lamp (254 nm, ≥15 W) with interlocked safety cutoff—automatically deactivates when sash is raised above operational threshold
• Low-vibration centrifugal blower (rated life >20,000 hours), delivering stable airflow with acoustic output ≤62 dB(A) at 1 m distance
• Static-dissipative electrostatic powder-coated steel enclosure and omnidirectional locking casters (two fixed, two swivel) for secure repositioning in shared lab spaces

Sample Compatibility & Compliance

The ZHJH-C1209B supports a broad range of non-volatile, non-toxic samples including microbial cultures, tissue explants, cell monolayers, sterile media preparations, and precision instrumentation calibration. Its airflow design meets ISO 14644-1:2015 requirements for cleanroom classification and aligns with Good Laboratory Practice (GLP) environmental controls for analytical method validation. While not certified to NSF/ANSI 49 or EN 12469, its construction and performance parameters conform to widely adopted industry benchmarks for laminar flow hoods used in QC microbiology (e.g., USP , EP 5.1.1), biopharmaceutical aseptic filling support, and academic cell culture workflows. All electrical components comply with IEC 61010-1 safety standards for laboratory equipment.

Software & Data Management

This model operates via analog voltage-regulated motor control and does not incorporate embedded firmware or network connectivity. However, its LED velocity display provides traceable, real-time operational data suitable for manual logbook entry in regulated environments. For laboratories implementing electronic recordkeeping under FDA 21 CFR Part 11 or EU Annex 11, the unit can be integrated into facility-wide environmental monitoring systems via external anemometer calibration and periodic verification logs. Routine maintenance—including HEPA filter replacement intervals (typically every 2–3 years depending on usage and ambient air quality)—must be documented per ISO/IEC 17025 clause 7.6 and internal SOPs governing equipment qualification (IQ/OQ/PQ).

Applications

• Aseptic transfer and subculturing of bacterial, fungal, and mammalian cell lines in academic and industrial research labs
• Preparation of sterile culture media, buffers, and reagents for downstream assays (e.g., ELISA, PCR setup, HPLC mobile phase filtration)
• Handling of sensitive optical components and microelectronic assemblies requiring particulate-free assembly environments
• Environmental monitoring plate exposure in pharmaceutical cleanrooms (ISO Class 5–8 background areas)
• Support role in GMP-compliant secondary packaging operations where product contact surfaces must remain free of viable contamination
• Teaching laboratories requiring durable, dual-station workspaces for undergraduate microbiology and biotechnology instruction

FAQ

Does this clean bench provide protection against hazardous biological agents or chemical vapors?
No. The ZHJH-C1209B is a vertical laminar flow device designed solely for product protection. It offers no containment for operators handling BSL-2+ pathogens or volatile solvents. Use only in BSL-1 settings with non-infectious, non-toxic materials.
What HEPA filter standard does the unit meet?
It employs a filter certified to EN 1822-1 H14 classification (≥99.995% efficiency at 0.3 µm MPPS), equivalent to ULPA-grade performance for particles ≥0.5 µm per US FED-STD-209E Class 100.
Is UV lamp intensity validated during installation?
UV irradiance (measured in µW/cm² at 1 m) is not factory-calibrated. Users must perform initial and semiannual validation using a NIST-traceable UV radiometer per CLSI M29-A3 guidelines.
Can the unit be hard-mounted or installed in a wall opening?
No. It is freestanding and designed for floor placement only. Structural modifications void warranty and compromise airflow integrity.
What is the recommended certification frequency for ISO Class 5 compliance?
Per ISO 14644-3, performance verification—including airflow uniformity, particle count, and filter integrity testing—shall be conducted annually or after filter replacement, relocation, or major maintenance.