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How to choose the air shower pass box or laminar pass box according to the actual demand?
How to choose the air shower pass box or laminar pass box according to the actual demand?The selection of an air shower transfer window or laminar flow transfer window needs to take into account the cleanliness requirements, industry norms, item characteristics cost, and other factors, the following is the specific selection guide:1. Cleanliness level requirements Air shower transfer window: The purification level is usually thousands (ISO 7), which is suitable for scenes with high surface cleanliness requirements but relatively low overall environmental cleanliness requirements (such as electronics and optoelectronics industries). Laminar flow transfer window: can maintain 100 level (ISO 5 level) or higher cleanliness, suitable for occasions with high environmental cleanliness requirements (such as biopharmaceuticals, and high-precision laboratories). 2. Industry compliance requirements Pharmaceutical industry: According to the new GMP specification, it is necessary to use a laminar flow transfer window to ensure that the clean area environment is not damaged during the transfer process, and to meet the self-purification time requirements (such as UV irradiation ≥15 minutes). Electronics/food industry: If the cleanliness requirement is 1000, the air shower transfer window can meet the demand; If you need higher cleanliness (such as 100 levels), you need to upgrade to a laminar flow transfer window. 3. Item characteristics Surface cleaning requirements: Air shower transfer window through high-speed airflow (more than 20m/s) to sweep the dust on the surface of items, suitable for items that can withstand strong winds (such as metal devices, and packaging materials). Sensitive items protection: The laminar flow transfer window maintains a clean internal environment through stable laminar flow to avoid items being exposed to polluted air, suitable for vulnerable biological samples, precision instruments, etc. 4. Cost and maintenance Initial cost: The price of a laminar flow transfer window is usually 2-3 times that of an ordinary air shower transfer window because it needs to be equipped with a laminar flow fan, a high-efficiency filter (H14 level), and a self-cleaning system. Operation and maintenance: The laminar flow transfer window needs to replace the filter regularly and check the wind speed, and the maintenance cost is high; The air shower transfer window needs to check the nozzle blockage and fan performance, and the maintenance is relatively simple. 5. Functional requirements Dynamic purge: The air shower transfer window can quickly clean the surface of the item, suitable for frequent transfer and the surface is easy to accumulate dust. Static protection: The laminar flow transfer window emphasizes continuous self-purification and is suitable for scenarios where a clean environment needs to be maintained during the transfer process (such as sterile drug delivery). 6. Installation conditions Space limitation: the air shower transfer window is compact and suitable for small space installation; A return air channel must be reserved for the laminar flow transfer window, which requires high installation positions. Airflow organization: The laminar flow transfer window needs to be matched with the clean room airflow design (as above to the next) to ensure the internal laminar flow effect. Summary and suggestion Preferred air shower transfer window: suitable for thousand-level cleanliness needs, limited budget, and need to quickly clean the surface of the scene (such as electronics factory, general laboratory). Preferred laminar flow transfer window: suitable for 100 and above cleanliness requirements, need to strictly comply with GMP specifications, transfer sensitive items (such as pharmaceutical factories, biosafety laboratories). Example scenario: Electronic components factory transfer PCB board → air shower transfer window (surface cleaning + thousand clean). Biopharmaceutical workshop transfer sterile Cillin bottle → laminar flow transfer window (maintain 100-level environment + comply with GMP) |
