Where are FFU used?
FFUs (fan filter units) are self-powered air purification devices widely used in industrial and scientific research fields requiring high cleanliness. Their core function is to maintain a clean environment through efficient filtration and air circulation. The following are their main application scenarios and technical features:
1. Electronics and Semiconductor Manufacturing
Wafer/Chip Production: Used in Class 1000 and Class 100 cleanrooms (such as ISO Class 5), ULPA filters (≥99.999% filtration efficiency for 0.12μm particles) control particulate concentrations to prevent photolithography defects.
PCB Manufacturing: In cleanrooms, FFU arrays achieve laminar air flow with a stable air speed of 0.3-0.5m/s, ensuring a clean environment for circuit board production.
2. Biomedicine and Laboratories
GMP Pharmaceutical Factories: Used in sterile filling areas and biosafety laboratories to prevent microbial contamination, requiring chemical filters to control AMC (aerosol molecular contaminants). PCR Labs: FFUs provide unidirectional airflow to prevent cross-contamination while maintaining temperature and humidity control accuracy (±0.1°C).
3. Optoelectronics and Precision Manufacturing
LCD Panel Production: In the yellow light workshop, FFUs work in conjunction with ESD protection systems to ensure a dust-free and static-free environment for photoresist exposure.
Optical Lens Processing: FFUs maintain Class 100 cleanliness levels locally to prevent surface scratches and contamination.
4. Other Special Applications
Food Processing: Used in aseptic packaging lines, they must comply with HACCP standards to control bacteria and dust.
Aerospace: Precision component assembly areas must meet ISO 14644-1 standards. FFUs are modularly expandable to accommodate varying area requirements.
Technical Features
High-Efficiency Filtration: Typically uses HEPA/ULPA filters with a filtration efficiency of ≥99.97% for particles 0.3μm.
Flexible Configuration: Supports single or multiple units in series, and can be integrated with intelligent control systems (such as variable frequency drive and differential pressure monitoring). Energy-saving design: DC FFUs use 30% less energy than traditional AC blowers and have a noise level of ≤55dB(A).