Clean room compressed air requirements

Analysis of compressed air requirements in clean rooms

As a special environment with extremely high requirements for air cleanliness, clean rooms need to meet a series of strict standards to ensure the stability of the production process and product quality. The following analyzes the specific requirements for compressed air in clean rooms from the three core dimensions of pressure, flow and purity.

1. Pressure requirements: stabilize supply and drive equipment to operate accurately

1. pressure range
   Equipment in clean rooms, such as pneumatic tools, automation equipment, clean workstations, etc., usually requires stable compressed air pressure to ensure normal operation. Pressure requirements are generally between 0.5 and 0.8MPa (about 5-8 kg), depending on equipment type and process requirements.

2. pressure stability
   Pressure fluctuations need to be controlled within a very small range (usually within ±0.05MPa) to avoid abnormal equipment operation or product quality problems caused by unstable pressure. This requires the compressed air system to have efficient pressure regulation and stable output capabilities.

2. Flow requirements: Adequate supply to avoid insufficient gas supply

1. flow calculation
   Flow requirements depend on the number of equipment in the clean room and the amount of air used. In order to ensure sufficient gas supply, it is usually necessary to increase the margin by 20%-30% based on the total gas consumption of the equipment. For example, if the total gas consumption of the equipment is 100m³/min, the system design flow rate should be no less than 120-130m³/min.

2. instantaneous flow response
   Some equipment (such as pulse dust collectors) may have instantaneous high flow requirements, and the compressed air system needs to have rapid response capabilities to meet instantaneous flow changes and avoid equipment shutdown or process interruption caused by insufficient air supply.

3. Purity requirements: no oil and no water, protecting a clean environment

1. Oil content control
   Oil in compressed air may pollute the clean room environment and affect product quality. Therefore, the system needs to use an oil-free air compressor or be equipped with a high-efficiency oil removal filter to ensure that the oil content of the output air is less than 0.01mg/m³, reaching the oil-free standard.

2. moisture content control
   Moisture may cause corrosion of equipment in clean rooms, moisture of products or process problems. The system needs to be equipped with drying devices (such as freeze dryers, adsorption dryers) to control the dew point temperature of compressed air between-20℃ and-40℃ to ensure that the output air is dry and free of moisture.

3. Particulate matter control
   Particulate matter in the air may pollute the clean room environment and need to be filtered through a high-efficiency filter (such as HEPA filter) to ensure that the output air particulate matter concentration is less than 0.1μm, meeting the strict requirements for air cleanliness in the clean room.

4. Technical solutions: integrated design to ensure system stability

In order to meet the high requirements for compressed air in clean rooms, the following technical solutions are needed:

1. oil free compressor
   Adopt oil-free lubrication technology to eliminate oil pollution from the source and ensure that the output air is pure and oil-free.

2. Efficient filtration system
   Equipped with multi-stage filters (such as pre-filters, precision filters, activated carbon filters, etc.) to gradually remove particulate matter, moisture and oil in the air to ensure air purity.

3. intelligent control system
   Sensors monitor pressure, flow, purity and other parameters in real time, automatically adjust the operating status of the system to ensure stable supply of compressed air, and have fault warning and remote monitoring functions to improve system management efficiency.

4. Dedicated pipes for clean rooms
   Stainless steel or special pipes for clean rooms are used to prevent fallout from the inner wall of the pipes from polluting the air, and at the same time ensure the tightness of the pipes and prevent the intrusion of external pollutants.

Clean rooms have extremely strict requirements for compressed air and need to be comprehensively controlled from three dimensions: pressure, flow and purity. By adopting technical solutions such as oil-free air compressors, high-efficiency filtration systems, intelligent control systems and dedicated pipelines for clean rooms, the stable and efficient operation of the compressed air system can be ensured and reliable guarantee for clean room production. When selecting a compressed air system, companies should select suppliers with corresponding technical strength based on their own clean room level and process requirements to ensure long-term stable operation of the system and product quality and safety.