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What is the leak detection standard for clean room HEPA filters?
What is the leak detection standard for clean room HEPA filters?What is the leak detection standard for clean room HEPA filters:As an important part of the air purification system, HEPA filters play a vital role in ensuring the air quality and cleanliness of the production environment. Regular leak detection tests are essential to ensure the performance and reliability of HEPA filters. Clean rooms are key environments for high-precision production in many industries, such as medicine, electronics, and food processing. In these environments, the performance of HEPA filters directly affects the cleanliness of the air, which in turn affects the quality and safety of the products. Therefore, it is essential to perform leak detection on HEPA filters. The purpose of leak detection of cleanroom HEPA filters is to detect the leakage of HEPA filters and find defects in HEPA filters and their installation processes, such as tiny pinholes, frame seals, gasket seals, and tiny cracks on the filter frame, to take corresponding remedial measures to ensure the cleanliness of the area. Leak detection standard for clean room HEPA filters: The leak detection standard for HEPA filters mainly includes the use of particle counting method, fluorescent leak detection method, and other methods to detect the leakage of filters, and set leakage rate standards to ensure the performance of filters. Detection method: The particle counting method is usually used for leak detection of high-efficiency filters. The difference in particle concentrations upstream and downstream of the filter is compared to determine whether there is a leak. In addition, the fluorescent leak detection method uses the luminous characteristics of fluorescent substances under ultraviolet light to determine the leak by observing whether there is a fluorescent substance downstream. These methods have their characteristics. For example, the particle counting method has high sensitivity and intuitive results, while the fluorescent leak detection method is simple to operate and has good visualization. Leakage rate standard: The leakage rate of high-efficiency filters should generally be controlled below 0.01% to ensure the filtering effect of the filter. For environments with special requirements, the leakage rate standard may be more stringent. For example, the ISO 14644 standard and the GB/T25915-2010 specification stipulate that for 0.3-micron particles, the maximum penetration rate of high-efficiency filters should be less than or equal to 0.01%. Operation precautions: When performing leak detection on high-efficiency filters, attention should be paid to standardizing the operating steps, such as using appropriate equipment, following specific operating steps, etc., to ensure the accuracy and reliability of the test results. |
