HJ VS-840U Vertical Laminar Flow Clean Bench

Overview

The HJ VS-840U Vertical Laminar Flow Clean Bench is an ISO Class 5-certified personnel-protective workstation engineered for routine aseptic procedures in microbiology, cell culture, pharmaceutical quality control, and academic research laboratories. It operates on the principle of unidirectional vertical laminar airflow: ambient air is drawn through a robust aluminum alloy pre-filter to remove coarse particulates, then passes through a single high-efficiency particulate air (HEPA) filter (695 × 600 × 38 mm, ≥99.995% efficiency at 0.3 µm) before being delivered downward across the work surface at a controlled, uniform velocity (0.25–0.45 m/s). This design ensures continuous displacement of contaminated air away from the operator and sample zone, maintaining a particle-free microenvironment compliant with Fed. Std. 209E Class 100 (≥0.5 µm) and equivalent ISO 14644-1 requirements. The unit features a compact, low-profile plenum housing enabled by an ultra-thin, frameless HEPA module—minimizing static pressure loss while maximizing interior workspace volume and visual clarity.

Key Features

• Vertical laminar airflow architecture with dual-speed electronically regulated centrifugal blower system, enabling precise adjustment of face velocity to match procedural requirements (e.g., sensitive cell handling vs. routine media preparation).
• Integrated aluminum alloy pre-filter—corrosion-resistant, washable, and rated for extended service life under standard laboratory particulate loads.
• Optimized ergonomics: 700 mm wide × 615 mm deep × 580 mm high work area accommodates standard Petri dishes, flasks, pipette racks, and biosafety-compatible accessories without crowding.
• Front-access configuration with tempered glass side panels and seamless aluminum-plastic composite work surface—non-porous, chemically resistant, and easy to decontaminate using ethanol or quaternary ammonium solutions.
• Dual lighting system: 20 W fluorescent lamp for general illumination (≥300 lx at work surface), plus independent 20 W UV-C germicidal lamp (254 nm) with safety interlock to prevent accidental exposure during operation.
• LCD-based digital control panel with tactile switches for fan speed, lighting, and UV activation—supporting repeatable operational protocols and reducing manual variability.

Sample Compatibility & Compliance

The VS-840U is validated for use with non-hazardous biological agents (BSL-1 and select BSL-2 applications where risk assessment permits), sterile reagents, tissue culture vessels, and precision instrumentation requiring particulate-free environments. Its performance conforms to ISO 14644-1:2015 (Class 5), ISO 14698-1:2003 (biocontamination control), and ASTM E2500-13 (verification of cleanroom equipment). While not a biological safety cabinet (BSC), it meets USP environmental requirements for low-risk sterile compounding when deployed in ISO Class 7 or better background rooms. All electrical components comply with IEC 61010-1 for laboratory equipment safety; UV lamp shielding satisfies IEC 62471 photobiological safety classification (Risk Group 2).

Software & Data Management

The VS-840U is a standalone electromechanical device with no embedded firmware or network connectivity. Operational parameters—including fan speed setting, UV exposure duration, and runtime—are manually configured and do not generate audit trails. For laboratories operating under GLP or GMP frameworks, users are advised to maintain external logbooks documenting daily startup checks (airflow verification via anemometer), UV intensity validation (using calibrated radiometer every 6 months), and HEPA integrity testing (DOP/PAO scan annually per ISO 14644-3). Optional calibration certificates and IQ/OQ documentation packages are available upon request from HJ Purification’s technical support team.

Applications

• Routine aseptic transfer of microbial cultures and fungal spores in teaching and diagnostic labs.
• Preparation of cell culture media, transfection reagents, and sterile buffers prior to use in laminar flow hoods or biosafety cabinets.
• Assembly and inspection of microfluidic devices, optical components, and semiconductor prototypes requiring sub-5 µm particle control.
• Pharmaceutical QC activities including filter integrity testing, sterility test setup, and environmental monitoring plate exposure.
• Forensic evidence handling where particulate cross-contamination must be minimized during trace evidence examination.

FAQ

Is the VS-840U suitable for working with pathogenic organisms?

No. This unit provides product protection only—not personnel or environmental protection. It must not be used for handling Risk Group 2+ agents, volatile chemicals, or aerosol-generating procedures. Use only in conjunction with appropriate PPE and secondary containment as defined by institutional biosafety policies.
What is the recommended HEPA filter replacement interval?

Under typical usage (6–8 hrs/day, ISO Class 7 ambient), replace the HEPA filter every 18–24 months—or sooner if differential pressure exceeds 250 Pa or anemometric measurements fall below 0.25 m/s at the work surface.
Does the unit meet FDA 21 CFR Part 11 requirements?

No. As a non-computerized, non-data-logging device, the VS-840U does not incorporate electronic records or signature functionality. Compliance with Part 11 applies only to systems that generate, modify, or store electronic records.
Can the UV lamp be operated simultaneously with the laminar airflow?

No. The UV lamp circuit is interlocked with the fan motor; UV activation automatically disables airflow, and vice versa—ensuring operator safety and preventing ozone accumulation.
Is third-party certification for ISO Class 5 performance available?

Yes. HJ Purification provides optional factory-issued test reports (per ISO 14644-1 Annex B) verifying particle count, airflow uniformity, and recovery time. Third-party validation by accredited labs (e.g., UL, SGS) can be arranged separately.