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Performance confirmation and testing standards of air shower transfer windows
Performance confirmation and testing standards of air shower transfer windowsAir shower transfer windows are used to transfer items between clean rooms and non-clean rooms. The confirmation and testing standards of their performance are related to product quality, production efficiency, maintenance of a clean environment, and health and safety of personnel.The performance confirmation of air shower transfer windows first includes the detection of wind speed and air volume. Wind speed is one of the key indicators to measure the effect of air showers. Generally, the wind speed inside the air shower transfer window should meet certain standards to ensure that particles and microorganisms on the surface of items can be effectively blown away. The air volume reflects the air supply capacity of the air shower system. Sufficient air volume can ensure that the entire transfer window can be effectively showered. During the test, professional anemometers and air volume measuring equipment are required to be used to perform multiple measurements at different locations to obtain accurate data. Filtration efficiency is another important aspect of air shower transfer window performance confirmation. The filter in the transfer window should be able to effectively block tiny particles and microorganisms. For high-efficiency filters, the filtration efficiency of particles with a particle size of 0.3 microns and above is usually required to reach more than 99.97%. By using a specific particle counter, the concentration of particles in the air before and after the filter can be detected, and the filtration efficiency can be calculated. Air shower time is also one of the key parameters for performance confirmation. Appropriate air shower time can ensure that the items are fully exposed to the air shower airflow to achieve effective cleaning effects. Generally speaking, the air shower time should be set according to factors such as the size of the transfer window, wind speed, and the degree of contamination of the items, and its rationality should be verified through actual testing. In addition, air tightness testing is also essential. Good air tightness can prevent untreated air from entering the transfer window, thereby ensuring the air quality of the clean area. The sealing of the transfer window can be checked by methods such as a pressure difference test or smoke test to ensure that there is no air leakage under normal working conditions. Noise level is also one of the performance indicators that need to be paid attention to. Excessive noise will not only cause discomfort to operators but may also affect work efficiency and environmental comfort. Generally, the operating noise of the air shower transfer window should comply with relevant national standards and industry specifications. In terms of testing standards, there are a series of specifications and standards for reference both internationally and domestically. For example, the relevant standards formulated by the International Organization for Standardization (ISO) and my country's national standard GB 50591-2010 "Clean Room Construction and Acceptance Specifications". These standards specify in detail the performance requirements and testing methods of air shower transfer windows in terms of wind speed, air volume, filtration efficiency, air tightness, noise, etc. At the same time, different industries and application scenarios may formulate more stringent internal standards based on their own special needs. For example, the performance requirements of the pharmaceutical industry for air shower transfer windows are usually higher than those of the general electronics manufacturing industry, because the cleanliness requirements of pharmaceutical production are more stringent. In summary, the performance confirmation and testing standards of air shower transfer windows are a comprehensive system that needs to be considered and tested from multiple aspects to ensure that they can meet the clean transfer requirements in different application scenarios. |
