Clean Bench (Laminar Flow Cabinet)‌

A clean bench is an air purification device that provides a locally high-cleanliness environment. It generates a unidirectional stream of purified air through a filtration system, widely used for aseptic operations. Key aspects include its core functions, working principles, and operational protocols:

‌I. Working Principle‌

1. ‌Air Purification Process‌
   Room air is initially filtered by a pre-filter, then pressurized by a fan into a plenum chamber. It undergoes secondary filtration through a High-Efficiency Particulate Air (HEPA) or Ultra-Low Penetration Air (ULPA) filter, forming a vertical or horizontal laminar airflow (typical velocity: 0.3–0.6 m/s). This effectively removes contaminants from the work zone, achieving Class 100 cleanliness (per U.S. Federal Standard 209E)
2. ‌Airflow Direction Classification‌
   • ‌Vertical Laminar Flow‌: Airflows downward, suitable for biomedical applications to minimize operator exposure
   • ‌Horizontal Laminar Flow‌: Airflows horizontally outward, commonly used in electronics industries where health risks are lower

‌II. Core Structure & Types‌

‌III. Key Application Fields‌

• ‌Biomedicine‌: Cell culture, microbial inoculation, sterile formulation filling
• ‌Electronics Manufacturing‌: Semiconductor packaging, precision component assembly (dust control)
• ‌Food & Cosmetics‌: Microbial testing, high-cleanliness product filling
• ‌Research & Agriculture‌: Plant tissue culture, animal pathogen detection

‌IV. Operating Procedures & Precautions‌

1. ‌Startup Protocol‌:
   • Wipe surfaces with ethanol and sterilize via UV irradiation for 30 min
   • Turn on fan and lighting; keep glass sash closed
2. ‌Safety Notes‌:
   • ‌Does not protect operators‌: Operates under positive pressure, safeguarding samples but not isolating users from hazards (e.g., chemical vapors, pathogens)
   • ‌Distinguish from Biosafety Cabinets‌: Biosafety cabinets use negative pressure to protect personnel and environment
3. ‌Maintenance Requirements‌:
   • Replace pre-filters and HEPA/ULPA filters regularly; install in double-door rooms in tropical climates for extended lifespan
   • Avoid blocking air inlets to ensure stable airflow

‌V. Technical Parameters Example (VD-650 Model)‌

Product Details

Shenzhen ZhongJian South Environment Co., Ltd was founded in 2003.

Which is the only high-tech technology company in Southern China with CNAS certification

We are mainly engaged in Designing Manufacturing, Testing & Verification, Manufacturing Processes and Quality Control, Engineering & Installation and After-Sale Service of clean room and devotes to control and treatment of air PM2.5, formaldehyde, benzene, VOC and other toxic and hazardous substances.

Our main clean room products and equipment include air filter, air shower/cargo shower room, high efficiency air outlet, FFU, AMC chemical filter.

We serve chip microelectronics, data centers, chemical laboratories, new energy, medical devices, pharmaceutical manufacturing, food and beverage, cosmetics, biotechnology, precision instruments, aerospace and other industries. The business fields involve clean room products and equipment, air micro-pollution services, clean design and installation, including household fields, commercial fields, industrial fields and animal husbandry fields.

We won good reputation in this industry. Products and services are highly acknowledged and recommended by customers, we hold strong influence and competitiveness in the market as well. With the mission of being the leading enterprise in Control and Treatment of Air Micro-Pollution, We strive for the leapfrog development of products, technologies and services in Spirit of The Pioneering, Innovative, Combatant and Progressive. We would constantly bring forth new ideas in the innovation and development with protection and sustainable China's environment.