Cleanroom Installation

The cleanroom class requirements of different industries are mainly based on process sensitivity and contamination control requirements, typically corresponding to the ISO 14644-1 standard (or the Class 100/Class 10,000 descriptions in the national standard GB 50073), as follows:

**Food Industry:** Critical processes (such as aseptic filling and ready-to-eat food inner packaging) require ISO 5 (Class 100) to ISO 7 (Class 10,000), while general processing/packaging often requires ISO 8 (Class 100,000) or lower. China's GB 50687 classifies food cleanroom areas into Classes I to IV, with high-risk areas corresponding to Class I/II (close to ISO 5–7).

**Semiconductor Industry:** Core processes such as lithography and packaging require ISO 1–ISO 4 (Class 1–10), while general cleaning/testing requires ISO 5–6 (Class 100–Class 1,000), with ISO 4–5 being the most common overall.

Aerospace Industry: Assembly and precision instrument integration often use ISO 5-7 (Class 100-10,000). High-reliability components (such as optics/sensors) may reach ISO 4, but overall, the standard is lower than semiconductors, with greater emphasis on anti-static and overall contamination control.

Precision Instruments (including medical devices): Sterile instruments (such as implants and syringes) require ISO 5-7 (Class 100-10,000). Non-sterile precision assembly typically uses ISO 7-8 (Class 10,000-100,000), conforming to GMP A/B/C or YY 0033 standards. Actual selection must consider specific processes, regulations (such as GMP, SC certification, AS9100), and local operating area requirements. It's not a uniform level for the entire plant, but rather a risk-zoned design. Furthermore, the aerospace industry prioritizes system-level cleanliness and anti-static measures, and may not use the highest-level cleanroom throughout the entire process.

Cleanrooms typically require the following core equipment to maintain their clean environment:

**Air Shower: Installed at the cleanroom entrance, it uses high-speed clean air to remove dust and microorganisms from personnel and object surfaces, preventing contamination from entering the clean area.

**Pass-through Window: Used for transferring small items between the cleanroom and non-clean areas, equipped with a double-door interlocking system to prevent cross-contamination.

**Laminar Flow Hood/FFU (Fan-Filter Unit): Provides a localized unidirectional flow clean space, suitable for operation areas with high cleanliness requirements, such as precision assembly or aseptic experiments.

**High-Efficiency Particulate Air (HEPA/ULPA) Filters 99.99% or more of particles larger than 0.3 microns, a key component for ensuring air cleanliness.

**Clean Bench: Provides a high-cleanliness environment for localized work areas, commonly used in laboratories or for delicate operations in electronics manufacturing.

**Cleanroom Air Conditioning System (AHU): Integrates temperature and humidity control with air circulation and filtration functions to ensure stable environmental parameters. **Cargo Shower Chamber:** A specially designed air shower channel for removing dust from raw materials, tools, and other items entering the cleanroom.

**Vacuum Cleaning System: Used to remove ultrafine dust and prevent secondary dust generation, particularly suitable for new materials workshops.

&&In addition, depending on industry requirements, auxiliary devices such as cleanroom vacuum cleaners, biosafety cabinets, and temperature and humidity control equipment may also be configured.