Laboratory class iso5 clean room - anti-static, mesh soft curtain, iron square, AC fan
Class iso5 clean shed is a common clean environment level, which means that under specific test conditions, the number of particles with a diameter greater than or equal to 0.5 microns per cubic meter of air shall not exceed 3.5 million, and the number of particles greater than or equal to 5 microns shall not exceed 20,000. In addition, the number of planktonic bacteria per cubic meter shall not exceed 500, and the number of precipitating bacteria per petri dish shall not exceed 10.
Specific standards for clean shed
Dust particle number standard
Number of particles greater than or equal to 0.5 micron: not to exceed 3.5 million.
Number of particles greater than or equal to 5 microns: not to exceed 20,000
Allowable number of microorganisms
Number of planktonic bacteria: not to exceed 500 per cubic meter of air.
Number of precipitating bacteria: not more than 10 per petri dish.
Other requirements
Number of air changes: at least 18 to 25 times per hour to ensure adequate air exchange.
Temperature and humidity: Temperature is controlled at 18°C to 24°C and humidity is maintained at 45% to 65% RH.
Noise control: The noise level should not exceed 70 dB A during dynamic testing and 60 dB A during static testing.
Airflow organization: mainly adopts local hole plate roof air supply, high efficiency air filter with diffusion plate roof air supply and other methods.
Cleanliness level table
Air Filtration
The air filtration system is a core component of a clean room and typically includes primary, medium and high efficiency filters (HEPA or ULPA). These filters capture and remove tiny airborne particles, ensuring that airborne particulate matter is maintained at an acceptable level of cleanliness.
Positive Pressure Control
Cleanrooms typically utilize positive or negative pressure systems to maintain a clean environment by preventing outside air from entering or inside air from escaping. Positive pressure control effectively prevents the entry of external contaminants by making the supply air volume of the purification system greater than the sum of the return air volume and the exhaust air volume, keeping the indoor air pressure higher than the surrounding environment.
Cleanliness Standard
The cleanliness of a clean room is usually measured in terms of particle counts per cubic meter of air, such as the ISO 14644 standard and U.S. Federal Standard 209E. These standards specify particle count limits for different cleanliness levels to suit the needs of different industries and applications.
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