Hujing VS-1300U Vertical Laminar Flow Clean Bench for Dual Operators

Overview

The Hujing VS-1300U is a vertically oriented laminar flow clean bench engineered for dual-operator use in non-sterile but particle-controlled laboratory environments. It operates on the principle of unidirectional vertical airflow: room air is drawn through a pre-filter to remove coarse particulates, then forced by a variable-speed centrifugal blower through an ultra-thin, unpleated high-efficiency particulate air (HEPA) filter (rated at ≥99.995% efficiency for particles ≥0.3 µm). The resulting laminar stream—uniform, low-turbulence, and downward-directed—creates a localized ISO Class 5 (Fed. Std. 209E Class 100) work environment within the defined work area. This architecture isolates the operator from the process while protecting samples from ambient airborne contamination. Unlike biological safety cabinets, the VS-1300U does not recirculate air nor provide personnel protection against biohazards; it is strictly a product-protection device compliant with ISO 14644-1 for cleanroom performance verification.

Key Features

• Ultra-thin unpleated HEPA filter (1135 × 600 × 38 mm) minimizes static pressure drop and enables compact plenum design, optimizing internal workspace volume and visual openness.
• Anodized aluminum pre-filter—corrosion-resistant, washable, and mechanically robust—extends service intervals and maintains consistent upstream filtration integrity.
• Variable-frequency fan control system with LCD interface allows precise adjustment of face velocity between 0.25 and 0.45 m/s, ensuring stable laminar conditions across varying filter loading states and ambient pressure differentials.
• Integrated 30 W fluorescent lamp (≥300 lux at work surface) and separate 30 W UV germicidal lamp (254 nm) support both routine operation and periodic decontamination cycles.
• Seamless aluminum-plastic composite work surface and tempered glass side panels enhance structural rigidity, ease of cleaning, and optical clarity without compromising ergonomic access.
• Low-noise operation (≤62 dB[A] at 1 m) and minimal mechanical vibration (≤5 µm peak-to-peak) meet requirements for sensitive instrumentation setup and microbiological plating procedures.

Sample Compatibility & Compliance

The VS-1300U is validated for applications requiring particulate-free handling of non-hazardous materials—including cell culture media preparation, pharmaceutical weighing, electronics assembly, and analytical sample staging. Its ISO Class 5 performance is verified per ISO 14644-1:2015 Annex B protocols using discrete particle counters (e.g., ≥0.5 µm channels). Microbiological validation follows ISO 14698-1:2003 principles, with settling plate assays confirming ≤0.5 CFU/plate·hour under standard operating conditions. While not certified to NSF/ANSI 49 or EN 12469, the unit complies with general laboratory infrastructure standards referenced in EU GMP Annex 1 (2022) for Grade A background environments and supports GLP-aligned documentation practices when integrated into controlled lab workflows.

Software & Data Management

The VS-1300U operates via embedded microcontroller logic with no external software dependency. All operational parameters—including fan speed setpoint, UV timer, and lamp status—are managed through the front-panel LCD interface. For traceability in regulated environments, users may log operational data manually or integrate the unit into facility-wide environmental monitoring systems (EMS) via optional analog voltage output (0–10 V) for real-time face velocity trending. Audit trails for UV exposure duration and maintenance events must be maintained externally per 21 CFR Part 11-compliant recordkeeping policies where applicable.

Applications

• Preparation of sterile culture media and reagents in academic and industrial microbiology labs.
• Weighing and dispensing of active pharmaceutical ingredients (APIs) in non-aseptic formulation areas compliant with ICH Q5C stability guidelines.
• Assembly and inspection of microelectromechanical systems (MEMS) and optical components requiring sub-5 µm particle control.
• Handling of sensitive reference standards in metrology and calibration laboratories.
• Supporting ISO/IEC 17025-accredited testing procedures where sample integrity depends on ambient particulate exclusion.

FAQ

Is the VS-1300U suitable for handling infectious agents or cytotoxic compounds?

No. It provides only product protection and lacks negative-pressure containment, airflow recirculation controls, or exhaust ducting required for biosafety or chemical hazard mitigation.
What is the recommended HEPA filter replacement interval?

Under typical laboratory use (8 h/day, moderate particulate load), replace every 18–24 months—or sooner if face velocity falls below 0.25 m/s at maximum fan setting or differential pressure exceeds manufacturer-specified limits.
Can this unit be installed in a non-air-conditioned space?

Ambient temperature should be maintained between 15–30°C and relative humidity below 70% to prevent condensation on filters and ensure stable motor performance and UV lamp output.
Does the unit include certification documentation for ISO Class 5 compliance?

Factory-installed units are supplied with a Certificate of Conformance and initial performance test report (including particle count, airflow velocity, and illumination data) traceable to national standards.
Is the UV lamp interlocked with the sash or access panel?

Yes. The UV lamp circuit is hardwired to the front glass panel switch: UV emission ceases automatically upon opening the vertical access barrier, meeting IEC 61000-4-2 ESD safety requirements.